KEYTEC PRODUCTS GUIDE No. 06

01 KEYTEC VISION

“ C I R C L E ”

輪Progressively Widening “Circle” Beyond The 60th Anniversary

KEYTEC Celebrated The 60th Anniversary In April 2018.
Our history started from the manufacturing of plywood from natural logs imported from the Southeast Asian
countries. Afterwards we had a turning point when we started the manufacturing of laminated veneer lumber(abbr.: LVL, trade name: KEYLAM®), for the ﬁrst time in Japan, which had become one of our key products andwith which we developed various composite building materials. We have been challenging various innovations,
including the installation of wood processing and remanufacturing machinery for processing and remanufacturing large dimension LVL.
Recently, environment surrounding the timber and plywood industries has been radically changing. Our company is no exception; the manufacturing of plywood from Southeast Asian wood species was shifted from our own
manufacturing in Japan to OEM (Original Equipment Manufacturer) at the local factories in Southeast Asia, andwe are gradually shifting to the use of sustainable and recyclable resources of planted trees. Also now, we are
actively working so that all of the raw materials for manufacturing plywood and scaffold planks and about 50%
for manufacturing LVL are from domestic forests. Moreover, we are promoting the “local production for local
consumption” and utilizing LVL of domestic wood for the construction of various buildings and houses in thelocal region, resulting in trust in and satisfaction with our service.
KEYTEC never stops growing. From now on, we will surely extend our “CIRCLE” by adding annual rings one by
one around it, and based on our pioneer spirit which has been cultivated over the years, we are certain that we
can continue manufacturing expertise contributing to the local community and extending well into the future.

KEYTEC VISION

02

OUR HISTORY OF 60 YEARS

20

20
NovemberMay

December

MarchConstruction of LVL Factory No.2 inMokuzai-minato, Kisarazu-shi, Chiba.

Housing Performance Type Approval
given to “KEEL METHOD”.

（ISO 9001）certiﬁcation obtained.

Acquisition of stocks of
Nihon Paneform Co., Ltd.

04
03
01
19

19

19

April

April

March

October

March

April

Construction of plywood factory in Ariake,
Koto-ku, Tokyo and establishment ofHarumi Plywood Co., Ltd.

Construction of plywood factory in Osone,
Yashio-shi, Saitama, and establishment of
Yashio Plywood Co., Ltd.

Construction of Kisarazu Factory in
Mokuzai-minato, Kisarazu-shi, Chiba.

Merger between Harumi Plywood Co., Ltd.
and Yashio Plywood Co., Ltd. and the company
name was changed to Keyo Co., Ltd.

Construction of LVL Factory No. 1 inMokuzai-minato, Kisarazu-shi, Chiba.

The company name changed to
KEYTEC CO., LTD.
and its headquarters moved to
Kiba Park Bldg. in Kiba, Koto-ku, Tokyo.

03 KEYTEC VISION

20
19
58

63

81

85

91

97

98
19

19
19

20

20

20

20

20

20

NovemberFebruary

June

October

April

April

April

April

Integration of Nihon Paneform Co., Ltd. Kisarazu Ofﬁce,
and changed its name to Kisarazu Remanufacturing Factory.

Acquisition of stocks of Akita Glulam Co., Ltd.

CoC（Chain of Custody）certiﬁcation obtained.

Headquarters moved toWood Land Tower 8F in Shinkiba, Koto-ku, Tokyo.

KEYBOARD Co., Ltd. established.

JK Industry Co., Ltd. merged.

Construction of LVL Remanufacturing Factory in
Mokuzai-minato, Kisarazu-shi, Chiba.

The 60th anniversary of KEYTECʼs foundation.

18
20

14
13
08
07
06
06
20

April

Afﬁliated company JK Industry Co., Ltd.
started operation.

05
20

05

04

KEYTEC VISIONMastering The Property Of “WOOD”

topic1This booklet is a product catalog ofInterview

KEYTEC as well as a journal with

Miyamura Veterinary Clinic

contents of interviews with various

Director

people.
This booklet is edited and published inorder to share the vision of what
KEYTEC is thinking of and is aiming at.
We hope to be able to introduce our
products and convey the concepts
conceived within.

Contents
topic

2

topic

3

Interview
Miyamura Veterinary Clinic

Architect

Structural Engineer

Local Report
Kawakami Village

Constructor

P.07

topic1 Interview Director

P.09

topic2 Architect

P.13

topic3 Local Report Kawakami Village

P.15

Our Products at Glance

P.17

Structural LVL

P.23

60-min. Quasi-Fireproof Load
Bearing Massive Wall

P.27

All-Wood Fireproof Structural
Element of LVL

P.29

I-Joist of Japanese Larch

P.35

I-Shaped/Girder and Box-Shaped/
Girder of LVL

P.39

LVL Stressed-Skin Panel

P.43

Earthquake-Resistant Frame

P.47

LVL for Interior Finishing

P.53

Plywood

P.57

Q&A

P.58

Our Company

Interview

Structural Engineer

Constructor

topic1

Interview
Miyamura Veterinary Clinic

Director

As If It Were An Art Museum!
Shaking Our Veterinary Clinic Free FromThe Conventional Image Of “CLINIC”.

Pursuit Of The Clinic Not Apparently Looking Like A "CLINIC",
Resulting In Receiving From Our Visitors The Comment“Looking Like An Art Museum!”
LVL walls standing upright in a row along the
sidewalk. The benevolent and serene expressionof wood lets you feel relaxed, when you walkalong the overwhelming yet soothing LVL walls.
There must be no people who think that this is aveterinary clinic when they see this impressivebuilding having the impact of affecting even thesurrounding townscape.
Director Takuma Miyamura of Miyamura Veterinary Clinic says “Since the opening of this clinic, I
have heard visitors to this building say more than
100 times that ʻThis building looks like an art
museum!ʼ.” This clinic was constructed andopened in December 2017, because the old clinic
building located nearby which had been used
before became too small and cramped. His
request from the beginning was that the newclinic building must be such that the visitors/attendants and their animal patients should not get
nervous caused by the conventional atmosphereof building of “CLINIC”. He intuitively liked immediately after he saw the daring design using LVL.
“I have never seen such space design anywhere in
the past. I had known and understood that its
realization would not come cheap, but I had notabandoned the idea of realizing it.”

07 KEYTEC VISION

Conclusion; The Best For Visitors/Attendants,
Animal Patients And Clinic Staffs
Make A Good Future of The Clinic.
Behind the door of the consultation room, it suddenly becomes a placeof medical practice where a life of animal is in question. Top priority
should be given to the functionality of space of the place, but an effort
to take visitorsʼ/attendantsʼ and animal patientsʼ feelings into consideration is not forgotten. We dared to use a pane of glass for thepartition wall between the consultation room and the treatment room.
The Director says, “The owner or attendant of the animal patient feels
uneasy if she or he cannot see what is being done in the treatment
room. Also, we staffs working in the next room can keep ourconsciousness high if we are being watched through the glass
partition wall.” On the other hand, the staff room has an atmosphereof resort villa securing mental and physical comfort. Diversiﬁed architectural spaces composed with sudden slow and rapid changes makethe staff maintain a high level of motivation.
He continues, “When I was a hospital veterinarian, I could see many
symptoms at the busy hospital. Then, I started private practice 7 years
ago. Professional skill is important, of course, but in addition to that I
consider human nature very important when I employ a staff. This isbecause of the fact that professional skill can be improved throughpractical experience.” After this clinic was opened, the number of thestaff of veterinarians increased to 7, making highly demanding medical
practice possible. There has been a 30% increase in the number ofvisitors/attendants and animal patients since the opening of this clinic.
The young and vigorous director may be good at a design for the
future.

Directorof Miyamura Veterinary Clinic

Takuma Miyamura

Graduated from School of Veterinary
Nursing and Technology (presently
named as, Nippon Veterinary and Life
Science University); worked at threeveterinary hospitals in Tokyo; opened
his ﬁrst private veterinary clinic on
December 14, 2009.
Opened the second private veterinary
clinic on December 14, 2015.

KEYTEC VISION

08topic2

Interview
Miyamura Veterinary Clinic

Architect

Structural Engineer

Constructor

All Were Groping Efforts,
For Pioneering The New Possibilities Of LVL.

Structural Engineer

Graduated from Graduate School ofArchitecture, Kogakuin University

Takahiro Sato
Architect

Ph.D. (Engineering)

Satoru Yamashiro

Consultation room
Space with priority given to functionality

09 KEYTEC VISION

Architect

Associate Professor at
Tohoku University of Art and Design

Takao Nishizawa

Looking from the waiting room
toward the door of consultation room

View from the southwest

The Architecture Which Cast A New AttractivenessInto Urban Landscape Was Created
By Trial And Error In The Trinity.
The “Laminated Wood Wall”, which gives the ﬁrst impression of thebuilding of Miyamura Veterinary Clinic, has such expression that has
never been seen before and that fascinates us greatly. This wood wallconstruction with quasi-ﬁreproof property was developed as a resultof hard work with concentrated challenge spirit by professionals forextending the possibility of timber buildings in urban areas.

Constructor

Kurashi Koubou Daiwa Co., Ltd. /President

Haruyuki Suzuki

During construction―Please let us know the development of design works.
Architect Nishizawa : To begin with, the narrow strip of land having
a width of 6.3 m was divided into three parts and each part 2.1m wide
was allocated to a waiting room, a consultation room and a treatment
room. Next, in consideration of the fact that required ﬂoor areas
increase gradually for upper ﬂoors and of the north side slant line
regulation, the open ceiling trapezoidal space of hall was created. In
addition, due to the special conditions required for a veterinary clinic
such as keeping out the heat and the prevention of animals fromrunning away, the ratio of the widths of the window and the wall, etc.
were determined. In the beginning, the whole building was designed to
be of LVL construction, but in consideration of rationality, we concluded to combine the LVL construction with the conventional post andbeam construction.
Architect Yamashiro : We have veriﬁed and shown clearly that the“Laminated Wood Wall” having the functions of “Structural”, “Finishing”
and “Fireprooﬁng” at the same time could be utilized in a relatively
small thickness of the wall.
―For the realization, were there any newly-tried
and worked-outs points?
Structural Engineer Sato : The characteristic of LVL is, for good orbad, “STRONG”. In the modern structural analysis, the high toughnessof structure is required and it was necessary to give special considerations to various matters such as metal connectors used for joint
connecting. For the future of the “Laminated Wood Wall”, we haveveriﬁed its structural property which is strong enough against an earthquake of an upper 6 scale on the seven-point Japanese seismic scale.
Also, the ground was soft and the crushed-stone piling method, which
is highly effective against soil liquefaction, was used in the ground andfoundation works. The piles are not regarded as “buried structure” andare advantageous for re-construction and the sales of land.
Constructor Suzuki : During the site construction work phase, we had
difﬁculties as there were no past examples of any actual works of thiskind. The structure is basically of timber framed post and beam
construction, but the process of erection works of the structural frames
is similar to that of steel frame construction, requiring high degree of
construction accuracy. However, unlike the common and conventionaltimber construction, it is not possible to make ﬁne adjustment once theframework is erected. At the construction site, there was distrust in the
new material of LVL with which we had a very short and limited experience. Because of that, we, together with the framers (steeplejacks),
went to the LVL Factory to have a factory tour. After the tour, we all feltthat “Oh, we gotta problem!” (laughing). Then, we repeatedly madestudies and did image training of how to erect, and checked how manydays are required for erection, etc. In the night, when the scaffoldings
were all removed at the work site, the workmen had their breath taken
away by the view of the whole structure. After all, there was no person
who could not or did not say “Very Good!” at the end of construction.

KEYTEC VISION

10topic2

I n terview
Miyamura Veterinary Clinic
Architect Structural Engineer

Constructor

Proceed With The Construction Of Actual Project Examples Of The Products
By Taking Advantage Of Their Fate Of “Heterogeneity” As Wood Materials.
―Any problems in promoting “Timber Buildings in
Urban Areas”?
Constructor Suzuki : For example, when we wish toconstruct timber framed public buildings in urban
areas, the process of ordering the project is commonly
based on that of RC or steel framed buildings. This
becomes a bottleneck. We hope that, in conformity withthe process of construction of timber framed buildings,
a ﬁrm order to proceed with the project of timber
framed building can be placed before the design work
is completed.
Architect Nishizawa : Properly speaking, an HVAC
system engineer, a structural engineer, an architecturaldesign engineer and a constructor must gather anddiscuss at the same table. If we exchange our ideas andviews at the design phase, we should be able to solve
coming problems in advance. By increasing the numberof example or reference projects, we wish to lower andremove barriers.

―The reasons why you are attracted by “WOOD”
and “Timber Buildings in Urban Areas”?
Structural Engineer Sato : The substance of LVL is“Living Creature”. It changes its form by shrinking andswelling, hence it cannot ﬁt into “Complete or PerfectEngineering”. My unfailing interest is in compensatingthat disadvantage with sensation and experience.
Architect Yamashiro : In the past, I regarded LVL as abuilding material which should be similar to the homogeneous material of concrete, thereby making it possible for me to express “LVL Uchihanashi” or “Fair-faced
LVL without Surface Treatment”. However, I was beginning to understand that by specifying the building
material with the commonly used word “TIMBER”, youwill face a wide variety of usages and species, etc. of“TIMBER”, each of which having its own aesthetic value.
When we understand the complexity, which is unique towood based materials and cannot be analyzed with one
fundamental rule, and gather to discuss, we can sincerely
face “SUBSTANCE” of the material. This is very creative.

Born 1969 in Shimane.
Graduated from Department of Architecture,
Faculty of Engineering, The University of Tokyo;
Completed the Masterʼs degree course at
Department of Architecture, Graduate School ofEngineering, The University of Tokyo in 1995.
1995 ~ 2002 After working at the ofﬁce of Maki
and Associates - Architecture and Planning,established as a co-founder, buildingLandscape,ltd, ﬁrst-class licensed architect ofﬁce. 2002 ~2009 Research Associate and later AssistantProfessor at Department of Architecture,
Graduate School of Engineering, The Universityof Tokyo Presently, Visiting Professor at Schoolof Architecture and Fine Art, Dalian University ofTechnology; Part-time Lecturer at Japan womenʼs
University, Tokyo. University of Science, andTokyo Denki University.

Born 1971 in Tokyo.
Graduated from Department of Architecture,
Faculty of Engineering, Yokohama National
University in 1993; Completed the Masterʼsdegree course at Department of Architecture,
Graduate School of Engineering Science,
Yokohama National University 1995.
1994 ~ Jointly founded the media art unit,
Responsive Environment.
1995 ~ 1998 After working at the ofﬁce of Itsuko
Hasegawa Atelier, jointly founded buildingLandscape, ltd, ﬁrst-class licensed architect ofﬁce. 2007
~ 2012 Associate Professor at Product Design
Department, Tohoku University of Art and Design.
2012 ~ Associate Professor at Architecture andEnvironment Design Department, Tohoku Universityof Art and Design.

buildingLandscape, ltd,ﬁrst-class licensed architect ofﬁce

Satoru YamashirobuildingLandscape, ltd,ﬁrst-class licensed architect ofﬁce

Takao Nishizawa

Born 1975 in Hokkaido.
2000 Completed the course at Graduate Schoolof Architecture, Kogakuin University.
Working as Member of Structural Design Group(SDG) and as Assistant at Koshihara Laboratory,
Institute of Industrial Science, The University ofTokyo, and from 2010 to the present, Member ofTeam Sakura. Director at team Timberize (NPO).
Main structural design works：
Seismic Retroﬁtting of Yawatahama-shi Hizuchi
Elementary School.
Apartment Building in Shimouma.
New Building of Kochi Prefectural Autonomous
Hall, etc.

Team Sakura (Group of designers and engineers)ﬁrst-class Registered Architect

Takahiro Sato

A chair carved out of a mass of LVL

11 KEYTEC VISION

Kurashi Koubou Daiwa Co., Ltd.
President

Haruyuki Suzuki

Born 1967 in Yokohama.
1989 Graduated from Faculty of Social Sciences,
Hosei University. Worked at Daiwa Koumuten Co.,
Ltd. and at the same time studied at the night
course of architecture at Chuo College ofTechnology.
BecameFirst-class
LicensedArchitect in 1996. Became the President of Daiwa
Komuten Co., Ltd. in 2007. Daiwa Koumuten Co.,
Ltd. is a 160 years old long-established company
specialized in the ﬁeld of construction of highperforming and long lasting houses incorporating
the high heat-insulating and highly airtighthousing system. In recent years, they are putting
effort into the construction of large and medium
size timber framed apartment houses andnon-residential buildings. Left Daiwa KoumutenCo., Ltd. to establish and become the President ofKurashi Koubou Daiwa Co., Ltd. in 2017.

Staff room
Extending the bearing surface of sofa to transform to a bed

Soft Glows Of Light Gathering In The Hall

Moving Rays Of Light On The Floor And WallKEYTEC VISION

12topic3

Local Report
Kawakami Village

The Future Created With “WOOD”.
Building The Village With Local “WOOD”.

Kawakami Nursery School

Kawakami Nursery School

13 KEYTEC VISION

Kawakami Nursery School

Forestry Research Center

Kawakami Nursery School

Forestry Research Center

Throughout The Three Generations,
The Villagers Living Near And Having Close Relationship With The Forest Appreciate
And Show By Themselves The Value Of Locally Grown Japanese Larch.
Kawakami Village in Nagano is proud of being Japanʼ s
No.1 producer of lettuce. The village became one of the
major producers of highland vegetables in Japan undercool climate of the highland region. It won a nation-wide
fame as “The Agricultural Village with Villagers having an
Average Annual Income of JPY 25 million.” Village Mayor
Tadahiko Fujiwara who has been responsible for theadministration of the village 26 years says, “Agriculture
and forestry are the life support device of the village,
hence the management of the forest is one of the mostimportant tasks of the management of the village.” He
has been active in promoting the revitalization of forestry.
Among his promotional activities, the unique program of“Locally Grown Natural Trees of Japanese Larch for All
Public Facilities!” is drawing attention all over the country.
In the ﬁrst place, the Japanese larch tree has been the“Tree of Our Birthplace” . In the past, for a long period oftime, it had been used as a temporary construction
material and a piling or supporting material for the mining
industry, etc., but the number of people engaged in theforestry industry decreased radically as Japanʼ s forestry
declined. On the other hand, seedlings planted extensively
after World War II are now grown to 50 - 60 years old
trees, waiting for felling. The Village Mayor came to thinkthat “There is no way not to utilize the tree we are somuch proud of!” and he introduced a guideline for thepromotion of the use of the tree in all public facilities tobe constructed in the future. This was before the “Act for
Promotion of Use of Wood in Public Buildings” that was
enforced in 2010 by the Government of Japan.
The building structure of Forestry Research Center of
Kawakami Village completed in 1997 shows clearly theusage value of the tree of Japanese larch which was

remanufactured with the most modern wood working
technology at that time. Planted and natural trees ofJapanese larch were used extensively and properly forstructural framing, interior and exterior ﬁnishing in theforms of “solid” , “glulam” and “LVL” in the building.
During the construction phase, new ways of utilizing thewood material were developed as well. They build
valuable facilities and make products with Japanese larchby themselves and show their values. For the villagers
who have been coexisting for years with the trees ofJapanese larch, this is the task what they should engage
in. Also, it is worth mentioning that 7,000 trees ofJapanese larch felled from the surrounding village-owned
forests were used for the construction of Kawakami
Junior High School, 2009. With the existence, at the same
period of time, of the three living generations ofgrandparents who planted, parents who had beencultivating, and children who were to study in the schoolbuilding after its completion, 60 years old trees ofJapanese larch were felled in the forest. The schoolbuilding is a multi-purpose facility having also thefunctions of a public facility of the village. Pupils use in
the daytime and villagers use in the nighttime.
“Forest is ʻSchool without Roofʼ . It is a place where
people learn the living nature and wisdom thoughout
generations.” This school building, in which one chainof “afforestation-felling-utilization” of trees can beexperienced, is valuable also in view of the fact that it
is a place where people of three generations withdifferent feelings about the trees of Japanese larch
gather and strengthen the bond between the forest
resources and the villagers.

The Administration Of Forestry Is The Pillar Of The Administration Of The Village,
And The Forest Resources Are The Essence Of The Country.
There Should Be Means Of Finding The Value Of
Forestry Other Than Its Economical Value.
In developing the village with the two wheels ofagriculture and forestry, it is no exaggeration to say thatthe healthy existence of forestry is a matter of life ordeath. Therefore, Village Mayor Fujiwara would not turnaway his eyes from the difﬁculty of making forestry
economically independent, but try to ﬁnd and make a
way of life and survival. “The added values of products
made of the trees of Japanese larch cannot bemeasured in terms of economical value alone. The added
values together with the basic economical value canbring out a desired effect. The added values can easily
compensate for the cost of managing the forest
resources.” The administration of forestry is the pillar of
the administration of the village, and the forest
resources are the essence of the country. While keeping
such unwavering conviction, there have been certainchanges in living of the villagers and surrounding
landscape. The future of Japanʼ s overall policies ofagriculture and forestry lies in the direction the village
mayor is looking forward to.

Kawakami-mura,
Minami-Saku-gun,
NaganoBorn 1938 in Kawakami-mura, Minami-Saku-gun,
Nagano. Studied and dropped out of Nagano
Prefectural Usuda High School. After engaged inagriculture, became a Village Ofﬁce staff. After
working as the Manager of Planning Section at thevillage ofﬁce, became the village mayor of
Kawakami Village in 1988. 24th year since taking
ofﬁce as the village mayor, now in the 6th term.
From 2005, Chairman of the Board of Directors,
Nagano Association of Towns and Villages. From2010 to 2017, Chairman of the Board of Directors,
National Association of Towns and Villages.

Village Mayor of Kawakami Village

Tadahiko Fujiwara

KEYTEC VISION

14

15 KEYTEC VISION

Product Index
P.17

Structural LVL
KEYLAM® KEYLAM CROSS®

P.23

60-min. Quasi-Fireproof● 60-min. quasi-ﬁreproof wall for 3-story
Load Bearing Massive Wall or lower non-residential building●

Structural
material

KEYLAM WOOD WALL®
P.27

P.29

All-Wood Fireproof
Structural Element of LVL
KEYLAM TAIKA®
I-Joist of Japanese Larch
KEYLAM JOIST®

P.35

●

Beam, joist, rafter, etc. used in
the wood frame and post andbeam construction methods● Also used as joist header or end joist in
the wood frame construction method●

I-Shaped/Girder and● Floor joist/beam/girder used in
Box-Shaped/Girder of LVL the wood frame and post andbeam construction methods

KEYLAM MEGA BEAM®
P.39

LVL Stressed-Skin Panel
KEYLAM SS Panel®

P.43

Earthquake-Resistant Frame
KEYLAM®
Earthquake-Resistant Portal Frame

P.47

●

Structural ﬂoor and roof panels
used in large-scale building●

A structural semi-rigid portal frame
for reinforcing openings in building

Interior ﬁnishing material
Quasi non-combustible interiorﬁnishing material● Non-combustible
interior ﬁnishing material

LVL for Interior Finishing●

Plywood●

KEYLAM Interior®

P.53

Structural element for ﬁreproof construction●

Softwood plywood
Lauan plywood● Plywood treated with insecticide● Scaffold plywood plank of domestic Wood●KEYTEC VISION

16

Stru ctura l LV L

KEYLAM
KEYLAM CROSS®

®

JAS (Japanese Agricultural Standard) certiﬁed product

F★★★★

High-Strength and High-Quality
Structural Wood Material.
KEYLAM is a structural LVL which can be manufactured
from logs with warps and bends unsuitable
for manufacturing lumber.

KEYLAM®

KEYLAM CROSS®

17 KEYTEC VISION

AQ (Approved Quality) certiﬁed productPhoto above : Fuchu-shi Regional Civic Center (Photo by: SusumuKOSHIMIZU©2014)
Photo lower left : KEYTEC Kisarazu Factory
Photo lower right : Matsuo Civic Center “Senshin-Kan”

KEYTEC VISION

18

Stru ctura l LV L

KEYLAM®
KEYLAM is an LVL (Laminated Veneer Lumber) manufactured
from rotary-peeled veneers, all of which are glued and pressed
together in the grain direction.

Advantages

Excellent Bending Strength

As all of veneers are glued in the grain direction, its property
is excellent for using as timber frames such as beams andposts. Especially, when it is used as a beam to supportvertical loads, it shows high bending strength.

Optimally Kiln Dried

Environmentally Friendly Material

B-grade logs with the defects of warps and bends unsuitable
for manufacturing lumber are reborn as structural building
materials.

Homogenous Material with Low Dispersion

Because of the fact that kiln drying of the material is done
when it is in the form of thin veneer, the moisture content ofﬁnished product of LVL is low (about 14 %), hence there isless possibility of causing problems such as deformation,
crack, loose joint connection, etc. which can lead to claim
after the completion of building.

Since KEYLAM® is manufactured by laminating multiple
sheets of thin veneer, it has a physical property of lower
dispersion in comparison with that of lumber and glulam,even if there are defects in strength such as knots in someparts of some veneers. Because of that, the lower limits ofstrength are higher in comparison with those of the othermaterials, and the allowable design stresses are higher.

Suitable for Preservative, Anti-termite
Chemical Treatments

Possibility to Manufacture Longand Straight Lumber

By mixing a preservative in the adhesive, preservation can bedone easily and thoroughly.

By scarf jointing veneers, long veneer sheets can be madeavailable for manufacturing long LVL beams and panels.
（Max. 12 m）

Application

Wood Species

Structural material

Japanese larch・Siberian larch（For Japanese cedar, red pine, and other wood species,
please contact us.）Speciﬁcations
Thickness（㎜）Width（㎜）Length（㎜）Strengthmax. 600㎜ (In case width 600㎜)

max.1200

max.12000

As per JAS criteria※ If the width of beam is equal to or
more than 600㎜,
please contact us.

Manufacturing Process

Reliable Integrated System
The structural LVL of KEYLAM® is manufactured by gluing most of dried thin veneers(approx. 3~4 ㎜ thick) in the grain direction, and its excellent properties of strength anddimensional stability have been highly valued.

Veneer(Veneers rotary-peeledfrom logs)

Strength tests
passed19 KEYTEC VISION

Primary lamella
product

Primary lamella
product(Primary lamella)Multiple glued
lamella productInspection of dimensions andtest of bonding property, passed.

Multiple glued
lamella product(Post/column,
joist/beam/girder,
thick panel and others)

Product quality inspection/
Checking of ﬁnished dimensions
Inspection passed

Inspection of dimensions andtest of bonding property, passed.

Dispatch

KEYLAM CROSS®
KEYLAM CROSS is diﬀerent from KEYLAM . The diﬀerence is that two
or more of veneer sheets are glued crosswise. This veneer composition
improves the lateral bending strength and stiﬀness of LVL lamella.
The use of LVL as a structural panel product is made possible.

Advantages

Excellent Dimensional Stability and Good Physical Property for Stronger Joints.

An ideal structural material utilizing characteristics of LVL and offering excellent dimensional stability andgood physical property for stronger joints.
KEYLAM CROSS® is the best answer to those who have been involved in construction and remanufacturingbusinesses and facing the problems inherent in design limitation and dimensional stability of wood.

Application

Wood Species

Structural material

Japanese larch・Japanese cedar

Speciﬁcations
Japanese larch

Japanese cedar

Thickness（㎜）Width（㎜）Length（㎜）Thickness（㎜）Width（㎜）Length（㎜）30max.1200

max.12000

25

max.1200

max.12000

50

max.1200

max.12000

30

max.1200

max.12000

Please contact us for details.

Please contact us for details.

Composition
Japanese Larch - Composition of Veneer Sheets
Thickness（㎜）No. of all veneer
No. of veneer sheets glued
lamination layers（nos.） in the grain direction（nos.）

No. of veneer sheets
glued crosswise（nos.）Composition of veneer sheets

30

10

8

2

｜
｜̶｜
｜
｜
｜̶｜
｜

50

16

12

4

｜
｜̶｜
｜
｜̶｜
｜̶｜
｜
｜̶｜
｜

No. of veneer sheets
glued crosswise（nos.）Composition of veneer sheets

Japanese Cedar - Composition of Veneer Sheets
Thickness（㎜）No. of all veneer
No. of veneer sheets glued
lamination layers（nos.） in the grain direction（nos.）

25

9

7

2

｜
｜̶｜
｜
｜̶｜
｜

30

11

9

2

｜
｜̶｜
｜
｜
｜
｜̶｜
｜

AQ Certiﬁcation: AQ-225-D1-1・2“KEYLAM® AQ DODAI SEKKON K3” (AQ certiﬁed Class K3 Preserved Wood
Sill) is certiﬁed by Japan Housing and Wood Technology Center as Class 2(equivalent to Category K3 of JAS) of "Approved Quality (AQ)”.
Also, it meets the requirements of Grade 2※ or better for the reduction ofdeterioration factor of the Housing Performance Indication System, hence
for housing loan, the basic rate of interest speciﬁed by Japan Housing
Finance Agency which provides housing loans is applied.
※ For the certiﬁcation of Grade 2 or better, wood sills need to be treated with a preservative to Category K3 or better.

KEYTEC VISION

20

Stru ctura l LV L

KEYLAM® - Technical Data
Design Strengths
According to the Government of Japan's Ministerial Notiﬁcation No.1024, Ministry of Land, Infrastructure,
Transport and Tourism, dated 2001, the Design Strengths of structural LVL are deﬁned as follows:

A-type Structural LVL
Out of structural LVL, those not having veneer sheets whose grain direction is orthogonal to the main grain
direction, or those having veneer sheets whose grain direction is orthogonal to the main grain direction only forthe adjacent parts of outermost layer.

Design Strengths of Compression, Tension and Bending
Classiﬁcation ofYoung's modulus
of bending

160E

140E

120E

100E

90E

80E

70E

60E

50E

21 KEYTEC VISION

Design Strengths of Horizontal Shear

Design Strength（Unit : N/㎜ ）2

Compression

TensionBending

Horizontal
shear class

Design Strength（Unit : N/㎜2）

Grade special

41.4

31.2

51.6

65V-55H

4.2

Grade-1

40.2

27.0

44.4

60V-51H

3.6

Grade-2

37.2

22.2

37.2

55V-47H

3.6

Grade special

36.0

27.0

45.0

50V-43H

3.0

Grade-1

34.8

23.4

39.0

45V-38H

3.0

Grade-2

32.4

19.8

32.4

40V-34H

2.4

Grade special

31.2

23.4

39.0

35V-30H

2.4

Grade-1

30.0

19.8

33.0

Grade-2

27.6

16.8

27.6

Grade special

25.8

19.8

32.4

Design Strength of Partial Compression

Grade-1

25.2

16.8

27.6

Grade-2

23.4

14.4

23.4

Class of marking ofpartial compression

Design Strength（Unit : N/㎜2）

Grade special

23.4

17.4

28.8

180B

18.0

Grade-1

22.8

15.0

25.2

160B

16.0

Grade-2

21.0

12.6

21.0

135B

13.5

Grade special

21.0

15.6

25.8

90B

9.0

Grade-1

19.8

13.2

22.2

Grade-2

18.6

11.4

18.6

Grade special

18.0

13.8

22.8

Grade-1

17.4

12.0

19.8

Grade-2

16.2

9.6

16.2

Grade special

15.6

12.0

19.8

Grade-1

15.0

10.2

16.8

Grade-2

13.8

8.4

13.8

Grade special

12.7

9.5

15.9

Grade-1

12.3

8.2

13.7

Grade-2

11.1

6.7

11.1

Grade

※Out of A type structural LVL, only for those
LVL marking the partial compression property(in the direction of vertical use).

Design Strengths of Partial Compression(Classiﬁcation by Wood Species)
Wood Species

Design Strength（Unit : N/㎜2）

Red pine
Siberian larch
Douglas ﬁr

9.0

Japanese cypress
Japanese larch

7.8

Radiata pine
Japanese cedar

6.0

B-type Structural LVL
Out of structural LVL, those other than A-type structural LVL andconforming to the stipulation as described below.

Item

Criteria

Location of crossgrain veneer sheets
Consecutive number oflayers of parallel
veneer sheets

１ Cross grain veneer sheets shall be placed in the 3rd layer from the outermost layer.
２ Cross grain veneer sheets shall not be placed continuously.
Consecutive number of layers of parallel veneer sheets shall not be less than 2 and not more than 5,
and there shall be a part where consecutive number of layers of parallel veneer sheets is not less than 3.
Composition of veneer sheets shall be symmetrical to the central axis in the direction of lamination.
In addition, the thickness of all composing veneer sheets shall be equal.

Composition ofveneer sheets

Design Strengths of Compression, Tension and Bending

Design Strengths of Horizontal Shear

Design Strength（Unit : N/㎜2）

Classiﬁcation ofCompression
TensionBending
Young's modulus
Stronger Weaker Stronger Weaker Stronger Weakerof bending

direction direction direction direction direction direction

140E

21.9

4.3

18.3

2.9

32.2

5.8

120E

18.7

3.7

15.6

2.5

27.5

4.9

110E

17.2

3.4

14.4

2.3

25.3

4.5

100E

15.7

3.1

13.2

2.1

23.2

4.1

90E

14.0

2.8

11.7

1.8

20.6

3.7

80E

12.5

2.5

10.5

1.6

18.4

3.3

70E

10.8

2.1

9.0

1.4

15.9

2.8

60E

9.3

1.8

7.8

1.2

13.7

2.4

50E

7.6

1.5

6.3

1.0

11.1

2.0

40E

6.1

1.2

5.1

0.8

9.0

1.6

30E

4.6

0.9

3.9

0.6

6.8

1.2

Horizontal
shear class

Design Strength（Unit : N/㎜2）
Direction ofvertical use

Direction ofhorizontal use

65V-43H

4.3

2.8

60V-40H

4.0

2.6

55V-36H

3.6

2.4

50V-33H

3.3

2.2

45V-30H

3.0

2.0

40V-26H

2.6

1.7

35V-23H

2.3

1.5

30V-20H

2.0

1.3

25V-16H

1.6

1.0

There is no category of Grade special, -1 or -2 for B-type Structural LVL.

Preservative and Anti-Termite Treatment
1）The treatment is very simple. As the adhesive is already a chemical mixture of adhesive and preservative/insecticide, thetreatment is completed when the LVL is manufactured.
2）The chemical will be uniformly distributed throughout the treated LVL. No need to treat cut and exposed faces with a new preservative/insecticide.
3）Unlike the pressure impregnation method, there is no need for the preservative/insecticide to penetrate the wood; making it
possible to manufacture and treat such hardwood LVL as Siberian larch.
4）It is environmentally friendly and much safer than the pressure impregnated type of LVL. In comparison to the pressure impregnated LVL which is treated by impregnating the preservative from the surfaces of product, in this method the ingredients of thepreservative in the mixture of adhesive and preservative permeate into the wood from glued faces inside the product and do notcome in contact with the surface of LVL product; thus, making it much safer for the end user and environmentally friendly.

KEYTEC VISION

22

60-min. Quasi-Fireproof Load Bearing Massive Wall

KEYLAM WOOD WALL®

Highly Strong and Quasi-Fireproof
Load Bearing Wall.
Laminated Wood Wall is a structural exterior wall systemwith a thick LVL panel of wood whose natural properties of physical strengthand ﬁre prevention/prooﬁng are made use of wisely.

Surface with laminated glue lines
in stripe pattern

Flat grain surface

23 KEYTEC VISION

Photo above : Nakoso Certiﬁed Kindergarten
Photo lower left : Miyamura Veterinary Clinic

Photo lower right : International Center, Kanagawa University

KEYTEC VISION

24

60-min. Quasi-Fireproof Load Bearing Massive Wall

KEYLAM WOOD WALL®
Advantages

Excellent Design Possibility & Flexibility

Excellent Structural Performance

Quasi-Fireproof Property

Applicable to Various Structures

Application

Wood Species

Walls and wall columns of woodfor wood and other types of buildings

Japanese larch・Japanese cedar

Speciﬁcations

Fire Resistance Design

KEYLAM WOOD WALL® has two expressions of surfaces withﬂat grain and laminated glue lines in stripe pattern. The
surface with laminated glue lines in stripe pattern, especially,
can give architectural space the unique expression whichcannot be given by any other wood materials.

It is known that LVL manufactured by gluing veneers with aﬁre-resistant adhesive burns slowly, even if it is a wood material. It can be used as a structural wall in quasi-ﬁreproof buildingsin accordance with the Ministerial Notiﬁcation about Fireproof
Construction issued in 2015 which stipulated “Fire ResistanceDesign Method of Solid/Massive wood Construction”.

Speciﬁcations of wood species and strength grades
A-type or B-type（with veneer sheets glued crosswise）
structural LVL
120E Grade-1 (Japanese larch A-type）
80E (Japanese larch B-type)
60E Grade-1（Japanese cedar A-type）
Equivalent to 50E (Japanese cedar B-type)※ Surface with laminated glue lines in stripe pattern is available only in A-type.

Thickness (㎜)Width (㎜)150

Making good use of its high strength properties, it is possible
to reduce the number of shear walls against earthquake, andto have large openings in walls. It can be applicable not only
to wood structures but also to steel and RC structures.

KEYLAM WOOD WALL® can be used as a structural wall inquasi-ﬁreproof buildings in accordance with the Ministerial
Notiﬁcation about Fireproof Construction issued in 2015
which stipulated “Fire Resistance Design Method ofSolid/Massive wood Construction”.

Fire Protection Cover of Charring Layer of Structural LVL
by Required Rate of Fire ResistanceCover of charring layer

Length (㎜)post / beamwall / ﬂoor / roof

30 min.
quasi-ﬁreproof­

25㎜

45 min.
quasi-ﬁreproof

35㎜

35㎜

60 min.
quasi-ﬁreproof

45㎜

45㎜

3000

90

120

In addition to the advantage of higher strengths generally,
compared with glulam, it is possible to achieve a short-termallowable shear strength of wall of 40 kN/m or more (equivalent to 20 or more of “the wall magniﬁcation factor” for shear
strength of wall). It can be used on the condition that structural
analysis is done properly for each case.

6000
1000

3000
6000

Required rateofﬁre resistance

3000
6000

The adhesive must be of phenol or resorcinol resin.
Reference:
Design Manual for Fire Resistive and Fireprooﬁng of Wood Buildings（Published by The Building Center of Japan in March 2017）
For details, please refer to P.108 of the Manual.

25 KEYTEC VISION

Structural Design
By using connectors embedded in the thick panel of KEYLAM WOOD WALL®, it is possible to design a building with strong shear
walls against earthquake. The following is an example of design of walls based on the tensile strength per connector.
Example of Calculation of Wall Magniﬁcation Factor for Shear Strength of Wall
Connector（LSB: Lag screw bolt）（GIR: Glued in rod）

2/3Pmax（kN）

Stiffness K（kN/㎜）

Speciﬁcation ofanchor bolt

Yield stress
Py（kN）

Wallmagniﬁcation
factor Pa（times）

Japanesecedar
A-typeLSB 35㎜ dia. x 445㎜ long - 2 pcs

90.3

281.4

M16 x 400㎜ long - 2 pcs

73.8

12.6

GIR 24㎜ dia. x 300㎜ long - 4 pcs

153.7

884.3

M22 x 400㎜ long - 2 pcs

142.4

24.2

Japanesecedar
B-typeLSB 35㎜ dia. x 445㎜ long - 2 pcs

121.4

220.1

M20 x 400㎜ long - 2 pcs

115.2

19.6

GIR 24㎜ dia. x 300㎜ long - 4 pcs

173.8

674.9

M24 x 400㎜ long - 2 pcs

165.9

28.2

Japaneselarch
A-typeLSB 35㎜ dia. x 445㎜ long - 2 pcs

141.8

717.3

M20 x 400㎜ long - 2 pcs

115.2

19.6

GIR 24㎜ dia. x 300㎜ long - 4 pcs

111.0

579.3

M16 x 490㎜ long - 2 pcs

102.1

17.4

Japaneselarch
B-typeLSB 35㎜ dia. x 445㎜ long - 2 pcs

256.4

528.8

M24 x 490㎜ long - 2 pcs

229.5

39.0

GIR 24㎜ dia. x 300㎜ long - 4 pcs

216.5

815.7

M27 x 400㎜ long - 2 pcs

215.7

36.7

Wood species
and Category

2/3 Pmax：2/3 of Pmax（max. stress in connector）
K：the average of initial stiffness of connector
Speciﬁcation of anchor bolt：designed so that the yield stress of anchor bolt is less than 2/3 of Pmax
Py：Yield stress of anchor bolt
Pa：Py/（3 1.96）
LSB：Manufactured by Stroog Inc.
GIR：Home Connector manufactured by SCRIMTEC JAPAN Co., Ltd.
Wall dimensions：thickness 150㎜ width 1000㎜ length 3000㎜
Calculation：Only tensile stresses at wall column bases are checked
Concept：The ductile anchor bolt is made to yield before the connector
For more information such as the tensile strength of each connector, etc., please see“The Manual of Structural Design, 2014 Report of Development of Massive Wall made from LVL of Japanese Cedar”
published by National LVL Association and available from HP of the Association at: www.lvl.ne.jp/data/index.html.

Isometric Drawing of the Construction

Embedding of Lag Screw Bolt（LSB）

Metal Connectors/Fasteners for Wall Column

Ryotaro Sakata Structural Engineers Co., Ltd.
（Metal Connectors（LSB）：Manufactured by Stroog Inc.）KEYTEC VISION

26

All-Wood Fireproof Structural Element of LVL

KEYLAM TAIKA®

Fireproof Structural Element
Composed of Engineered Woodof LVL Only.
By covering the surfaces of wood columns insizes of 150〜600mm with 60mm
thick ﬁre-retardant treated LVL panels(rated as quasi non-combustible ),a 60-min. ﬁreproof structuralelement is manufactured.

Fire Preventive and Fireproof Performance Test and Evaluation
Test specimens of column were made and ﬁre tested
under loading in a laboratory furnace of General
Building Research Corporation of Japan to develop
60-min. quasi ﬁreproof columns.
After 60 minutes of incineration, the test specimen wasleft for 4 hours in the furnace for load testing columns
until the temperature went down to near the room
temperature. The picture below shows the cut sectionof the specimen after the test.
No charred parts on the surfaces of the load bearing
glulam column of Japanese cedar were seen.

Cut section after testing

27 KEYTEC VISION

Before testing

After testingAdvantages

Possibility of All-Wood Structural Construction
As all-wood structural elements are made available, it ispossible to design and construct buildings with thesestructural and ﬁnishing materials even if higher degree ofﬁre-resistivity is required.

Application as Interior Finish Material

Replaceable at Site after Fire

If by any chance ﬁre occurs, the damaged ﬁreprooﬁng covermaterial can be replaced with a new one at site.
Charred ﬁreretardant treated
LVL to be replaced

New ﬁreretardant treated
LVL for replacement

By choosing the beautiful looking LVL panels of LVL as aﬁreprooﬁng material, they can be used as decorative ﬁnish
materials at the same time. That means the development of
the material functioning both as a ﬁreprooﬁng and decorativeﬁnish material has been realized.

Possibility of Site Fabrication/Installation

The ﬁreprooﬁng material is basically fabricated at factory, butfabrication and installation at construction site are also
possible.

Application

Wood Species

Column for 60-min.
ﬁreproof construction

Load bearing member:
Japanese cedar (lumber, glulam and LVL)
Fire-protection covering:
LVL of Japanese cedar

Speciﬁcations

Composition

270

Cross sectional dimensions ofload bearing member（㎜）150〜600※ In case of a dimension exceeding
240㎜, there is a vertical joint.

60

Load bearing
member

150

60

Fire retardant treated LVL

270

By covering the surfaces ofwood columns in sizes of150~600㎜ with 60㎜ thickﬁre-retardant treated LVL
panels （rated as “quasi
non-combustible”）,a 60-min.
ﬁreproof structural element
can be manufactured.

Fire retardant treated LVL
Glulam60

Fire retardant treated LVL
Non-combustible material

Aluminum tape

Ministerial Certiﬁcation

720

Load bearing member

600（Dimension of load bearing member : 150㎜）

FP060CN-0706：Fire-protection covering of LVL, treatedwith a phosphorous & nitrogen-based
ﬁre retardant, on surfaces of column ofJapanese cedar.

60

General Incorporated Association of “National
LVL Association” has received the ministerial
certiﬁcation.

720※ For the sizes of over 150 ㎜ ~ 600 ㎜, the certiﬁcation will beobtained in the near future.

KEYTEC VISION

28

I-Joist of Japanese Larch

KEYLAM JOIST®

Structural Wood Material Assembled
from Flange of LVL and Web ofPanel Glued Together.
An innovative structural material most suitable for use in ﬂoor
and roof constructions, reassuring that there is no possibility of leading
to a claim against defects such as shrinkage, twist, warp, bow, etc.

29 KEYTEC VISION

Photo above : Residential house built with the conventional post and beam structural system
Photos lower left & lower right : Actual application examples of KEYLAM JOIST®

KEYTEC VISION

30

I-Joist of Japanese Larch

KEYLAM JOIST ® ROOF

KEYLAM JOIST®

KEYLAM JOIST ® FLOORKEYLAM JOIST®

31 KEYTEC VISION

Advantages

Reliable Quality

Deﬁnition of Shear Strength

Use of Domestic Wood

Easy Installation

This reliable structural product is certiﬁed by the Minister ofLand, Infrastructure, Transport and Tourism in accordancewith the Article 37 of the Building Standard Law of Japan.

KEYLAM® （LVL：Class 120E） manufactured from domestic
wood of Japanese larch is used for the ﬂange of the I-joist.

High Stiffness

The stiffness of ﬂoor and wall structures can be improved forless twisting and warping of the structures.

Possibility of Longer Spans

It is possible to use in large-scale buildings having long spansof frame structures to create large architectural space.

The shear strength properties of the horizontal plane ofstructure and of the load bearing metal joint connectors aredeﬁned clearly.

Light and easy to handle so that installation can be completed
in shorter time. It is possible to simplify the works of installation onto beams and bearing walls.

Certiﬁed 60-min. Fireproof Floor Construction(with or without Heat Insulating Material)

A 60-min.ﬁreproof ﬂoor construction certiﬁcation has beenobtained. Please contact us for details.
[FP060FL-0125] [FP060FL-0131]

Drilling Holes

It is possible to drill holes of up to dia. 220㎜ in the web for
installation of ventilation ducts in typical residential houses.

Application

Wood Species

Beam, joist, rafter, etc. used in the wood frameand post and beam construction methods
Also used as joist header or end joist in thewood frame construction method

Flanges : Japanese larch

Speciﬁcations
Web：
OSB

Length（㎜）53Length（㎜）3660（12 ft）

9.5

241

3660
（12 ft）
302

Height（㎜） Width（㎜）534575（15 ft）

4575（15 ft）
5490（18 ft）

9.5

7320（24 ft）

5490（18 ft）

302

53

7320（24 ft）

35

Height（㎜） Width（㎜）302

KEYLAM JOIST® 53-302(Regular)

KEYLAM JOIST® 53-241(Order-made product)

241

Flange53

53

Manufacturing Process

Ripping LVL lamella to make a ﬂange

Making a groove in the ﬂange

Bevelling the edges of the web

Assembling the ﬂange with the
web by gluing together

KEYTEC VISION

32

I-Joist of Japanese Larch

KEYLAM JOIST ®
Span Table for Floor Joist
Span Table

Spacing of ﬂoor joists（㎜）
Type

303

333

406

455

500

Span（m）

Span（m）

Span（m）

Span（m）

Span（m）

53-241

4.78

4.67

4.44

4.31

4.20

53-302

5.30

5.17

4.92

4.78

4.66

The above table is prepared on the following conditions:・ Evenly distributed loading・ Design load for ﬂoor W= Dead load WF + Live load P (N/m)

・ Dead load WF = Self-weight of ﬂoor frameworkx Spacing of ﬂoor joists + Self-weight of ﬂoor joists
・ Self-weight of ﬂoor framework ＝ 600N/m2

・ Live load = 1800N/m2
・ Allowable max. deﬂection of ﬂoor joists is 10㎜.

Design Strength
Design Strength

Design Strength
Heighth（㎜）Weight（N/m）

Bending moment

Shear

M（N・m）

V（N）

Reaction force R（N）
45㎜

89㎜

Bending stiffness
EI （ 109N・㎜2）（End support） （Mid-span support）

241

32.4

11200

15300

10500

23000

570

302

36.3

14000

18000

10500

23000

870

・ The reaction forces shown above are based on the condition that the length of support is 45 ㎜ at the ends and 89 ㎜ at the mid-span.
・ The formula below is used to estimate the deﬂection Δ (㎜) at the mid-span caused by the evenly distributed loading.
・ Deformation enhancement coefﬁcient = 2.0

Estimate of the Deﬂection Δ（㎜）
caused by evenly distributed loading

Δ=

5WL 4
384 EI+

WL2
74706hΔ：Deﬂection（㎜）
W：Design load for ﬂoor（N/㎜）
EI ：Bending stiffness（N/㎜2）
h ：Height（㎜）L ：Span length（㎜）Notes：74706＝1400N/㎜2 9.5㎜ hw/h CQ
1400N/㎜2：Shearing modulus of the web
9.5㎜：Thickness of the web
CQ：Coefﬁcient according to loading condition（1/8 in case of evenly distributed loading）

hw/h：Height of the web

Allowable strength shall be as per the following table:

Long term allowable strength

Short term allowable strength

Bending

Shear

Reaction force

Bending

Shear

Reaction force

1.1M/3

1.1V/3

1.1R/3

2M/3

2V/3

2R/3

M：Design bending strength（N･m） V：Design shear strength（N） R：Design reaction force strength（N）
In accordance with “The building Standard Law of Japan, Article 82, Rules No.1~No.3”, when checking structural stability under snow loading the allowable strength
in relation to long term force shall be the value shown in the above table multiplied by 1.3, and in relation to short term force shall be the value shown in the abovetable multiplied by 0.8.

Precautions for Use
It is prohibited to use the I-joist under the following conditions:
Do not drill
a hole too
close tothe point of
support.

When cutting the rafter
diagonally, the range ofcutting must be within
the thickness of the
supporting wall.

Do not make cuts
or notches
in the ﬂange.

Wall

33 KEYTEC VISION

Metal Joint Connectors/Fasteners
Simpson Strong-Tie® Wood Construction Connectors

Double I-joist − on face mount hanger

Single I-joist − on face mount hanger
Simpson I-Joist Hangers(With the Simpson Strong-Grip®
seat which secures I-joists inposition without joist nails)

KJI joistheight（㎜）
Metal
Connectors

Nailing
Allowable
Face
Joist
strength（N） (to header(to lower
or beam)ﬂange of I-joist)(Stiffeners are required at ends)

Metal
Connectors

Allowable
strength（N）

NailingFace(to header
or beam)Joist(to lower
ﬂange of I-joist)

241

IUS2.06/9.5

2990

8-ZN65­MIU4.28/9

7580

16-ZN90

2-ZN40、4-ZN65

302

IUS2.06/11.88

3740

10-ZN65­

MIU4.28/11

7580

20-ZN90

2-ZN40、4-ZN65

Simpson I-Joist Hangers (With the Simpson Strong-Grip® seat which secures I-joists in position without joist nails)
Steps of Installation
Step 1
Step 2（Simpson IUS I-Joist Hanger）
Slide the KEYLAM JOIST®
downward into the IUS
hanger until it rests
above the large teardrop.

Attach the IUS
hanger to
the header.

Step 3Firmly push or snap
KEYLAM JOIST®
fully into the seatof the IUS hanger.

Yamabishi Kogyo I-Joist Hangers (With the protrusion on the bottom secures I-joists in position without joist nails)

Single I-joist − on face mount hanger

Double I-joist − on face mount hanger(Without joist nails)

KJI joistheight（㎜）
Metal
Connectors(Stiffeners are required at ends)

Nailing
Allowable
Face
Joist
strength（N） (to header(to lower
or beam)ﬂange of I-joist)

Metal
Connectors

Nailing
Allowable
Face
Joist
strength（N） (to header(to lower
or beam)ﬂange of I-joist)

241

I-JOIST55241 CZ

2990

8-ZN65­

I-JOIST 108241 CZ

7540

14-ZN906-ZN65302

I-JOIST55302 Z

2990

8-ZN65­

I-JOIST 108302 CZ

7540

14-ZN906-ZN65The allowable strength of the hanger may be more or less than that of the I-joist supported by the hanger; therefore it is recommended to check the strengths of both parts. For further information, please contact us.
Remarks
・ Allowable strength of the hanger is only for the loads on ﬂoor. For the allowable strength of the hanger incase of snow loading, please contact us.
・ Have a clearance of 1~2㎜ or more between the faces of supporting header/beam and the end of I-joist.
・ Use proper nails to ﬁx the hanger as speciﬁed in the table.
・ The height of the hanger must be more than 60% of the height of KEYLAM JOIST®.
・ If the slope of KEYLAM JOIST® is over 0.2/10, please use slopeable I-joist hangers.

Certiﬁcation by the Minister ofLand, Infrastructure,
Transport and Tourism

ＭＷＣM-0017

Design Conditions
・ Classiﬁcation of the duration of continuous loading is assumed to be the long term（equivalent to 50 years).
・ The smaller value of the allowable design strengths of ZN nails and KEYLAM JOIST® (on 45㎜ support at end)
is assumed to be the design strength.
・ The design strengths of hanger shown in the table are the values based on the condition that the supporting
beam or header is of SPF softwood lumber.
・ The width of supporting beam or header must be not less than 89㎜ to ﬁx the hanger.
For further details, please contact the following:
Simpson Strong-Tie® Wood Construction Connectors：Tanaka Co., Ltd. (The distributor in Japan)
Yamabishi Kogyo I-Joist Hangers：Yamabishi Kogyo Co., Ltd.

KEYTEC VISION

34

I-Shaped/Girder and Box-Shaped/Girder of LVL

KEYLAM MEGA BEAM®

Highly Stiﬀ I- or Box-Shaped LVL Beam and
Girder in whose Web Holes for Pipes andDucts can be Made.
Only the web (LVL) is assumed to take the bending and shear forces alone,while the ﬂange part contributes to increasing the stiﬀness of
ﬂoor construction to reduce environmental vibration.

Box-shaped
I-shaped

35 KEYTEC VISION

Tokyo Yurikago Kindergarten Project built with KEYLAM MEGA BEAM (T-Shaped Type)®
received the Prime Minister's Award of Kids Design Awards 2016
The project of “Tokyo Yurikago Kindergarten + Satoyama Educational Initiative” (orinitiative for the realization of societies in harmony with nature through conservation
and advancement of socio-ecological production landscapes and seascapes)
received the Prime Minister's Award which was the highest among the awards of“Kids Design Awards 2016”.

A single story wood building with large openings in walls andthe characteristic deep pent roof veranda of 100 m long madeof KEYLAM MEGA BEAM（I-Shaped Type）®.
The longest beams of KEYLAM MEGA BEAM（I-Shaped Type）®
extend from one end of the classroom to the edge of pent roof
to create wide open-space for various activities.
Photo above : Tokyo Yurikago Kindergarten - Front view
Photo lower left : Classroom
Photo lower right : Veranda

KEYTEC VISION

36

I-Shaped/Girder and Box-Shaped/Girder of LVL

KEYLAM MEGA BEAM®
Advantages

Possibility of Longer Spans

Design Method

Light Weight and Low Cost

Drilling Holes

Suitable for Use in Hybrid Construction Systems

Certiﬁed 60-min. Fireproof Floor Construction(with or without Heat Insulation Material)

It can be used for composing ﬂoor and roof structures having
the long spans of 6m~12m in residential houses andmedium-high multi-story and large-scale wood buildings.

It is 30% lighter in self-weight compared with a glulam withthe equivalent bending property, hence excellent cost performance.

It can be used as a ﬂoor beam/girder and roof rafter/girder inlight-weight structural elements of ﬂoor and roof of wood,steel and RC framed buildings.

Only the web（LVL）is assumed to take the bending and shear
forces alone, while the ﬂange part contributes to increasing thestiffness of ﬂoor construction to reduce environmental vibration.

It is possible to drill holes of up to dia. 220㎜ in the web for
installation of ventilation ducts in typical residential houses.

A 60-min.ﬁreproof ﬂoor construction certiﬁcation has beenobtained. Please contact us for details.
(I-Shaped/Girder only) [FP060FL-0124] [FP060FL-0128]

Application

Wood Species

Floor beam/girder・Roof rafter/girder

Japanese larch・Siberian larch

Speciﬁcations
I-shapedBox-shaped

Width（㎜）Height(㎜)Width（㎜）Length(㎜)Height(㎜)
750

356
181

450
114

500

Length(㎜)900

max.12000

1200

max.12000

550
600
Can be custom-ordered.

LVL Class 60E (Japanese cedar), 100E, 120E, 140E
（Japanese larch・Siberian larch）

Design of Sectional Dimensions of Structural Members

540

600

KEYLAM
MEGA BEAM®
120E

600

Glulam
E105

Lumber ofJapanese cedar
E70

Bending test

In comparison with glulam, KEYLAM MEGA
BEAM® can have the same bending stiffness
with a smaller sectional area of the material.
Bending property has been veriﬁed byconducting bending tests at laboratories.

37 KEYTEC VISION

120
120

114

Span Table
Span Table［Floor］

Product

Spacing（㎜）Live load

333

455

500

667

910

1000

KMB - I-shaped 356 120E

8.1

7.1

6.8

­

­

­

Residential house 1800N/m2

KMB - I-shaped 356 120E

7.1

6.1

5.8

­

­

­

Ofﬁce building 2900N/m2

KMB - Box-shaped 550 120E

­

­

10.6

9.9

9.1

8.9

Ofﬁce building 2900N/m2

2
Evenly distributed load, dead load = 1200N/m（Residential
house・Ofﬁce building）
１.Deﬂection 15㎜（Stiffness EI = With full cross sectional area)
２.Span L/ 400（Stiffness EI = With full cross sectional area)
３.Bending・shear（Checking the long term allowable stresses of the web only）

Span Table［Roof］

Product

Heavy snowfall region
General region
Spacing
of
100㎝
140㎝
200㎝
30㎝
50㎝
rafters
LowHighLowHighLowHighLowHighLowHigh（㎜） gradient gradient gradient gradient gradient gradient gradient gradient gradient gradient

KMB - I-shaped 356 120E

455

10.6

10.0

10.1

9.5

7.9

8.2

6.9

7.2

5.9

6.2

KMB - Box-shaped 550 120E

910

12.7

11.9

12.0

11.4

10.1

9.8

9.4

9.1

8.9

8.7

Evenly distributed load, dead load = 530N/m2
１.Deﬂection 20㎜（Stiffness EI = With full cross sectional area)
２.Span L/200（Stiffness EI = With full cross sectional area)
３.Bending・shear（Checking the long term stresses under snow loading of the web only）

Light-Weight Structural Member
220

Ministerial Certiﬁcation

Weight (kg) of 6 m long member

200
180
160
140
120
100

The weight of KEYLAM
MEGA BEAM® is approx.
60% of that of glulamwith the same bending
property, and because it
is light-weight, it is easier
to design, transport andinstall.

KEYLAM MEGA BEAM®
（I-Shaped Type)60-min. Fireproof Floor Construction
FP060FL-0128（with heat insulation material）
FP060FL-0124（without heat insulation material）

80
60

Approx. 60 %40
200Lumber ofJapanesecedar E70

GlulamE105

KEYLAM
MEGA BEAM®
120E

KEYTEC VISION38LVL Stressed-Skin Panel

KEYLAM SS Panel®

Composite Beam by Integrating both Faces of Framework ofBeams with Panels for Improving Eﬃciency against
Out-of-Plane Bending Moment.
This is a hollow wood slab construction suitable for creating ﬂat slab space without joists
or rafters, and can be used eﬀectively as a large ﬂoor element with a relatively longer span
while securing a greater ceiling height in non-residential buildings.

39 KEYTEC VISION

Photo above : Clubhouse of Shimonoseki Golf Club（Photo by : Shimizu Corporation）
Photo lower left : Suzunoki-dai Nursery School
Photo lower right : KEYLAM SS Panel® in construction

KEYTEC VISION40LVL Stressed-Skin Panel

KEYLAM SS Panel® Roof
The depth of KSP® (KEYLAM Stressed-Skin Panel) is smaller andit can be used for composing light-weight shed and ﬂat roofs.

KSP®

For use in ﬁreproof construction

Roof beam（Wood structure・
RC structure・
Steel structure）

Ministerial certiﬁcation of 30-min. ﬁreproof
construction for roof obtained,
Ministerial Certiﬁcation No.
FP030RF-1865 (1) Without heat insulation material
FP030RF-1865 (2) With heat insulation material● Fire protection with 21mm thick ﬁre-resistant gypsum board● Possible to use as a ﬁreproof roof of factory, warehouse, etc.
● No restriction on span

● Many types of roof ﬁnishing material can be used.

KEYLAM SS Panel® Floor

For details, please see “The Manual of Fire-Resistive Structures”
published by National LVL Association and available from HP
of the Association at www.lvl.ne.jp/data/index.html.

The depth of KSP® is smaller and it can be used forcomposing light-weight ﬂoors.

KSP®

41 KEYTEC VISION

Floor beam
（Wood structure・
RC structure・
Steel structure）

Advantages

Possibility of Longer Spans

Suitable for Use in Hybrid Construction

It can be used for composing ﬂoor and roof structures having
the long spans of 6m~12m in residential houses andmedium-high multi-story and large-scale wood buildings.

It can be used as a ﬂoor beam/girder and roof structural roof
component/girder in light-weight structural elements of ﬂoor
and roof of wood, steel and RC framed buildings.

Light-Weight and High Thermal Insulation

Design Method

As it is a hollow construction, it is lighter than large dimension
solid engineered wood, and a thermal insulation material can
be ﬁlled in the hollow space of panel.

Only the web（LVL）is assumed to take the bending and shear
forces alone, while the ﬂange part contributes to increasing thestiffness of ﬂoor construction to reduce environmental vibration.

Shorter Construction Time

Certiﬁed 30-min. Fireproof Roof Construction(with or without Heat Insulation Material)

As it is prefabricated at factory and delivered to construction
site, erection works can be completed in a shorter time,making cost reduction possible.

A 30-min. ﬁreproof roof construction certiﬁcation has beenobtained. Please contact us for details.
［ FR030RF-1865(1)、(2) ］

Application

Wood Species

Structural ﬂoor and roof panels for longer
spans used in large-scale buildings of wood,steel and RC constructions

Web：Japanese larch
Flange：Japanese larch（In case the width is more than 1200㎜, spruce is used）

Speciﬁcations
Width（㎜）Height(㎜)Length(㎜)1200

max.650

max.12000

1820

max.650

max.12000

Span Table
Span Table For Roof

Max. span Snow
（㎜）
depth

Span Table for Floor

Panel depth(㎜)General region

Heavy snowfall region

Max. span（㎜）

Panel depth(㎜)Max. allowable load（N/m2）

30㎝

50㎝

100㎝

140㎝

200㎝

2900

4000

8000

300

300

300

300

350

7000

450

500

9000

300

350

300

350

350

8000

500

550

10000

400

400

350

350

400

9000

550

600

11000

450

500

350

400

450

10000

600

650*

12000

500

550

450

450

500

※Snowfall 30㎝・50㎝ ： Bottom face of panel open, width 1820㎜, web spacing 600㎜
Snowfall 100㎝〜200㎝ ： Box-Type, width 1820㎜, web spacing 600㎜
Loading condition ： Evenly distributed load, dead load = 440 N/m2 (with pressed cement tile rooﬁng)
With the EI value of full sectional area, deﬂection 20mm or L/400,
only bending and shear stresses in the web under snow loading are considered in the structural analysis
The above is an example only for your information.

※Box-Type, width 1820㎜, web spacing 600㎜
Loading condition ：Evenly distributed load, dead load = 1200N/m2
With the EI value of full sectional area,deﬂection L/800, only bending and shear stresses
in the web are considered in the structural analysis
The above is an example only for your information.
* With a different spacing of webs.

KEYTEC VISION

42

Earthquake-Resistant Frame

KEYLAM Earthquake-ResistantPortal Frame®

Earthquake-Resistant Portal Frame requiring
No Complex Structural Analysis normally required for
Use of Conventional Rigid Frames.
For simple installation in places such as built-in garage andopen-space living room with large openings.

43 KEYTEC VISION

Photos above & lower left & lower right :KEYLAM® Earthquake-Resistant Portal Frame in construction

KEYTEC VISION

44

Earthquake-Resistant Frame

KEYLAM® Earthquake-Resistant Portal Frame
Advantages

Free & Flexible Design of Openings

Two Types of Rigid Framing System

Suitable for Use in Narrow & Small Land

Box-type frame
Connection with aramid ﬁber
sheet

KEYLAM® Earthquake-Resistant Portal Frame is made ofwood materials and easy to remanufacture so that it can bemade freely in various designs and sizes.

By using it as an alternative to load bearing walls, sufﬁcient
openings for realization of houses with light rooms can be
secured.

Two types of frame are available. You can choose either orboth according to your needs.
Portal-type frame
Connection with aramid ﬁber
sheet and bolts

Design of Openings

By reinforcing the openings to increase the resistance toshaking and twisting forces caused by earthquake, thestructural balance can be improved.

Application

Wood Species

For openings in newly built houses andbuildings of the post and beam construction,
improvement in renovation of resistance of
opening part against earthquake, spacious
built-in garages with wide openings, and for
ﬂexible design of openings in interior space

Japanese larch・Siberian larch

Speciﬁcations
Product

Sectional dimensions of frame（㎜） Distance between centerlines of post（㎜）Box-type frame

105

150

910〜3640

Portal-type frame

105

240

910〜6370

Portal-type frame /with joint at mid-span

105

240

910〜6370

Box-type frame

45 KEYTEC VISION

Portal-type frame

Portal-type frame /with joint at mid-span

Shear Strength Table▼Top of sill
Sill (girth)150

Effective width
W ­（480+post width）

240

H

240

Post

Metal connector forpost base

Sill

Girder, beam

240

240

W

Distance between centerlinesof posts at both sides

240

Effective height

Girder, beam

Distance between top of sill and bottomof girth (girder, beam, and lintel),not exceeding 2,900㎜

H

Effective width
W ­（300+post width）

Distance between centerlinesof posts at both sides

Effective height

Post

Distance between top of sill and bottomof girth (girder, beam, and lintel),not exceeding 2,900㎜

150

W

Post

Effective width
W ­（480+post width）

240

Metal connector forpost base

Sill

Foundation▼Top of foundation

Foundation▼Top of foundation

150

Effective height H ­300

H

Distance between top of sill and bottomof girth (girder, beam, and lintel),not exceeding 2,900㎜

W

Distance between centerlines
Girder, beamof posts at both sides

150※ Use only at the 1st ﬂoor level※ Jointed at mid-span with metal connector※ Use only at the 1st ﬂoor levelBox-type frame

Portal-type frame

Portal-type frame / with joint at mid-span

Distance
Allowable Magniﬁcation Magniﬁcation
betweenshear
coefﬁcient coefﬁcient
centerlines
strength of equivalent per unitof postwall
length（kN）
W（㎜）Distance
Allowable Magniﬁcation Magniﬁcation
betweenshear
coefﬁcient coefﬁcient
centerlines
strength of equivalent per unitof postwall
length（kN）
W（㎜）Distance
Allowable Magniﬁcation Magniﬁcation
betweenshear
coefﬁcient coefﬁcient
centerlines
strength of equivalent per unitof postwall
length
（kN）
W（㎜）

910.0

2.89

1.47

1.62

1820.0

9.83

5.01

2.75

1820.0

7.73

3.94

2.16

1137.5

3.24

1.65

1.45

2047.5

9.84

5.02

2.45

2047.5

7.58

3.87

1.89

1365.0

3.54

1.81

1.32

2275.0

9.86

5.03

2.21

2275.0

7.43

3.79

1.67

1592.5

3.80

1.94

1.22

2502.5

9.88

5.04

2.01

2502.5

7.29

3.72

1.49

1820.0

4.00

2.04

1.12

2730.0

9.89

5.04

1.85

2730.0

7.15

3.65

1.34

2047.5

4.16

2.12

1.04

2957.5

9.91

5.05

1.71

2957.5

7.00

3.57

1.21

2275.0

4.26

2.17

0.96

3185.0

9.91

5.05

1.59

3185.0

6.86

3.50

1.10

2502.5

4.31

2.20

0.88

3412.5

9.93

5.06

1.48

3412.5

6.73

3.43

1.01

2730.0

4.31

2.20

0.81

3640.0

9.94

5.07

1.39

3640.0

6.59

3.36

0.92

2957.5

4.25

2.17

0.73

3867.5

9.96

5.08

1.31

3867.5

6.45

3.29

0.85

3185.0

4.14

2.11

0.66

4095.0

9.97

5.08

1.24

4095.0

6.32

3.22

0.79

3412.5

3.99

2.04

0.60

4322.5

9.98

5.09

1.18

4322.5

6.19

3.16

0.73

3640.0

3.79

1.93

0.53

4550.0

9.99

5.09

1.12

4550.0

6.05

3.09

0.68

­

­

­

­

4777.5

10.00

5.10

1.07

4777.5

5.92

3.02

0.63

­

­

­

­

5005.0

10.01

5.10

1.02

5005.0

5.87

2.99

0.60

­

­

­

­

5232.5

10.03

5.11

0.98

5232.5

5.79

2.95

0.56

­

­

­

­

5460.0

10.04

5.12

0.94

5460.0

5.65

2.88

0.53

­

­

­

­

5687.5

10.05

5.12

0.90

5687.5

5.53

2.82

0.50

­

­

­

­

5915.0

10.06

5.13

0.87

5915.0

5.40

2.76

0.47

­

­

­

­

6142.5

10.07

5.13

0.84

6142.5

5.27

2.69

0.44

­

­

­

­

6370.0

10.08

5.14

0.81

6370.0

5.14

2.62

0.41

KEYTEC VISION46

LVL for Interior Finishing

KEYLAM Interior®

Unique Expression made possible Only with LVL,
completely Diﬀerent from SOLID WOOD.
Face of LVL with stripe pattern created from production
process of lamination is exposed to view for special
architectural eﬀects and interior designs.

47 KEYTEC VISION

Photo above : Yokohama Campus Building No. 29, Kanagawa University
Photo lower left : Megrez Hall, Polaris College of Nursing
Photo lower right : Sato Dental Clinic（Photo by: Satoshi Asakawa / Design by: Architect-cafe mikio tai architect & associates）

KEYTEC VISION48

LVL for Interior Finishing

KEYLAM Interior®
Interior ﬁnishing wood material withcharacteristic stripe pattern madepossible only with LVL.

KEYLAM Interior® Board
Edge glued boards of KEYLAM Interior® forinterior ﬁnishing of a wide range of surfaces.

KEYLAM Interior® T&G
Tongued and grooved boards of KEYLAM Interior® foreasier interior ﬁnishing work.

Tongue-and-groove joint speciﬁcation

KEYLAM Interior® FR
By giving KEYLAM Interior® a quasi non-combustible property,
an interior ﬁnish material for versatile interior ﬁnishing workwith fewer limitations from ﬁre regulations is now available.
KEYLAM Interior® FR is quasi non-combustible, so that it can be used inparts of building where the restriction on interior ﬁnish of the BuildingStandard Law prohibits the use of material without the quasi non-combustible property. (Quasi non-combustible property only, certiﬁed by the
Minister of Land, Infrastructure, Transport and Tourism)

LVL treated with a phosphorous & nitrogen-based
ﬁre retardant [QM-0821 (3)]（General Incorporated Association of “National LVL
Association” has received the ministerial certiﬁcation.）

49 KEYTEC VISION

Advantages

Unique Stripe Pattern

Use of Domestic Wood

Application

Wood Species

Interior ﬁnish material

Japanese cedar・Japanese larch

Face of LVL with unique stripe pattern created from production process of lamination is exposed to view for special
architectural effects and interior designs.

Domestic or local wood can be used on request.

Speciﬁcations

Quality and Property
Control System
Wood
Species

Product name

KEYLAM Interior®

Generalspeciﬁcations

Japanese cedar・Japanese larch

Thickness(㎜)

Width Length
(㎜)
(㎜)

2000

15
150
30

KEYLAM Interior® General
Boardspeciﬁcations

Japanese cedar・Japanese larch

30

T&G
KEYLAM Interior® board product
Packed in corrugated
T&G

Japanese cedar・Japanese larch

15

cardboard（10 pcs/pack）

Quasi
KEYLAM Interior® non-combustible
FR
property

600

4000

140

2000

※Effective
width※KEYLAM Interior® FR needs to be surface coated.

150
30

2000
4000

15
Japanese cedar

4000

Quality is controlled thoroughly andjointly by KEYTEC Co., Ltd. andGeneral Incorporated Association of“National LVL Association”. Reliable,
secure and safe material is supplied.
Security

Reliability

SafetyMinisterial certiﬁcation

2000（KEYLAM Interior® FR）

4000

QM-0821（3）：LVL treated with a phosphorous& nitrogen-based ﬁre retardant

2000
4000

（General Incorporated Association of“National LVL Association” has received
the ministerial certiﬁcation.）

Precautions for Use of KEYLAM Interior® FR
1.The product is for interior use only, and cannot be used outdoors.
2.The product is pressure impregnated with inorganic ﬁre retardants. If it is exposed to moisture or high humidity in storage or
during construction, an efﬂorescence phenomenon may occur, making the surface covered with whitish crystallized ingredientsof the ﬁre retardant which leached out from the inside of pressure impregnated LVL. This phenomenon can spoil the beauty ofsurface.
3.It is necessary to always surface coat the product in order to prevent an efﬂorescence phenomenon from occurring. For surface
coating, use an acrylic urethane or urethane resin coating material. Some coating materials recommended by us are; “Safety
Waltz New Rescue Coat” manufactured by Otani Paint Co., Ltd. and “Pure Flat” by Gen Gen Corporation.
4.The coating material shall be a solvent based coating material. If a water based coating material is used, an efﬂorescencephenomenon from occurring. can occur and impair the quasi non-combustible property of treated LVL.
5.As the product is dispatched soon after pressure impregnation and drying are completed without further processing for dimensional adjustment, it may be necessary to adjust the dimensions after delivery.
6.When installing the product, joints must be protected with a ﬁre-resistive material in order to prevent ﬁre from burning throughthe joints. Please be informed that without such joint protection, the product is not qualiﬁed as a quasi non-combustible material.

KEYTEC VISION

50LVL for Interior Finishing

KEYLAM Interior® FR SheetThis is an ultra-thin sheet sliced oﬀ with innovative technology
from the stripe patterned face of LVL for ﬂexible interior ﬁnishing.

Advantages

Unique Stripe Pattern of LVL

A new lineup in the series of KEYTECʼs designs of interiorﬁnishing products has been added.

Foldable

The ultra-thinness of the sheet excels in plasticity making it
possible to stick it to curved and uneven surfaces.
Around a projected corner part, the sheet can be foldedaround parallel to the stripe.

Certiﬁed Non-Combustible Material

A ministerial certiﬁcation as a non-combustible material has
been obtained. It can be used in places where ﬁre safety
restrictions on interior ﬁnishing are applied.

Ultra-thin veneer sheet

Use of Local Wood

Local wood from forests around Japan can be used.

Application

Composition

Interior ﬁnish material

Finish coating
Surface coating(Urethane resin coating, etc.)
LVL

Wood Species

Japanese cedar
Special multi-ply
backing paper

Speciﬁcations
Product nameSpeciﬁcations

Width (㎜)Length (㎜)Thickness (㎜)KEYLAM Interior® FR Sheet

Finish coating

910

2430

approx. 0.28

※Order-made product , width 630㎜ and length 2730㎜.

51 KEYTEC VISION

Manufacturing Process

Sliced to ultra-thin veneer strips

LVL is manufactured

Welding veneer strips
to make full size veneer sheets

Non-combustible veneer sheets
for interior ﬁnishing

Procedure of Installation

Sticking with lap joint

Sticking with grooved joint(Joint width 9㎜ or more)

Sectional details of
Cross-cut
lap jointtape
approx. 1㎝
Ultra-thinveneersheet

Ultra-thinveneer sheet

Base material

Base material

Underlay tape

Hat-shaped joiner（Primer applied）
9㎜ or
more

Sticking with grooved joint(Joint width less than 9㎜)
Less thanUltra-thin
9㎜veneer sheet
Base panel
material
Strip of ultra-thin veneer sheet
stuck in advanceBase material

Sticking with lap joint is a method
similar to that of sticking vinyl clothon wall with lap joint.

Groove width
9㎜ or more

①In case plasterboard is the base
Stick widthwise; along the grooved joint, the edge of veneer sheet shall bealigned. The following features are noted:
・ The use of hat-shaped joiners eliminates the need for extra layer of plasterboard.
・If the surfaces of the base material cut at construction site need to be covered
with the veneer sheets, use always hat-shaped joiners.
・ Insert a joint rod along the grooved joint until all installation work is completed.
(Recommended width of joint is 9㎜ or more, and that of depth 8㎜ or more.)②In case calcium silicate board or ﬂexible board is the baseUse boards cut with a panel saw to exact dimensions. In case the board
is cut at construction site, and for the width and depth of joint, refer to theprocedure similar to that of plasterboard.

Groove width
less than 9㎜

Stick a strip of ultra-thin veneer sheet on the base material in advance.

Certiﬁcation by the Minister of Land, Infrastructure, Transport and Tourism
The certiﬁcation is given on the condition that KEYLAM
Interior® FR Sheet is used to surface ﬁnish the non-combustible base materials listed in accordance with NM-4383:(Steel & Other Metals), NM-4384: (Aluminium based

Materials) and NM-4385: (Inorganic Materials such as Fiber
Reinforced Cement Boards, Glasses, Mortar, Stones,
Plasterboards of 12mm or thicker).
Manufacturer : BIG Will Co., Ltd.

KEYTEC VISION

52

Structural Plywood

Plywood
JAS (Japanese Agricultural Standard) certiﬁed product（Scaffold plywood plank of domestic wood excluded)

100 Years Since the Start ofManufacturing Plywood in Japan.
Plywood has for years been regarded as an indispensable
material in our wood loving Japanese lifestyle forits good workability and usability in making
DIY items, furniture, houses, buildings, etc.

Plywood

Scaffold plywood plankof domestic wood

53 KEYTEC VISION

Photos above & lower left : KEYTEC Kisarazu Factory
Photo lower right : Scaffold plank of domestic wood in use

KEYTEC VISION

54

Structural Plywood

Lauan Plywood
JAS marked plywood for general use

JAS (Japanese Agricultural Standard) certiﬁed product
Advantages

Southeast Asian Wood Species
Plywood manufactured from Southeast
Asian wood species（broad-leaf tree or
hardwood）.

Beautiful Face VeneersIts face veneers are beautiful and smooth, so that it is widely used as a base board ofdecorative panel, as well as for general and structural uses.

Softwood Plywood
JAS marked structural plywood

JAS (Japanese Agricultural Standard) certiﬁed product

Advantages

Domestic Wood

Plywood manufactured
domestic wood.

from

100%

Use of Thinned Wood

Structural plywood is manufactured
from thinned trees of softwood fromthe forest.

Use of Local Wood

Logs felled in designated areas can beused for manufacturing plywood.
Logs used are in conformity with SGEC
and FSC®.

Plywood treated with Insecticide
JAS marked plywood treated with insecticide

JAS (Japanese Agricultural Standard) certiﬁed product

Advantages

Strong against Insect Attacks
The injurious insect of Lyctus brunnus
is kept off.

Microcapsule

The insecticide contained in the microcapsule reacts only when the insect
bites, hence the ingredients of insecticide do not disperse or emit under usual
conditions.

55 KEYTEC VISION

Safe Material

It is treated with a non-organophosphorus-based insecticide and highly safe.
Also, in conformity with the criteria of
the VOC Regulation in force.

No Unpleasant Odor

Human-friendly and odorless.

Reliable Material

As the insecticide is mixed in theadhesive, it is much safer for a humanbody in comparison with surface
treated plywood.

Scaffold Plywood Plank of Domestic Wood
Strong scaffold plank of plywood

Advantages

Wide Range of Application

It can be used in the ﬁelds of chemical, electric and ceramics
industries, plant construction, etc. as well as for temporary
stands of entertainment events, etc. where metallic scaffold
planks are not suitable.

Possibility of Nailing and Easy to Cut and Drill

Unlike the metallic scaffold plank, it can be nailed, cut, drilled,etc. easily.

Application

Wood Species

Speciﬁcations

Scaffold planks in conformity withthe various forest certiﬁcation
systems can be manufactured
FSC certiﬁed scaffold planks canalso be manufactured

Japanese larch

Thickness（㎜）Width（㎜）35

240

Manufacturing Process

Storing at
Kisarazu Factory

4,000
2,000

Flow of Utilization
Scaffold planks

Thinned trees ofJapanese larch
and B-grade logs
are transported
from the forestsof various regions

Length（㎜）Veneers

Product (yield rate 50%)

Dunnage boards
and ﬂoorboards

After using as scaffold
planks, next as dunnageboards and ﬂoorboards

The remaining 50%(by-product) is burnt in
the boiler of the factory
to generate heat energy
used for drying and hotpressing veneers.

Squarefootboards

After that, cutting
further to use as
square footboards

Carbon Dioxide Fixing

Precautions for Use

Service Life・ Excessive impact loads induced by jumping up/off must be
avoided.
・ Do not overload the plank exceeding the allowable payload.

The analysis of correlation for 6-month, 12-month and24-month durabilities based on the bending test resultsof test specimens after 3-month weathering andexposure to radiation outside shows that the service lifeof the scaffold plank is estimated to be about 3 years innormal usage and under proper management.

Allowable Payload

Cross section
Thickness Width（㎜） （㎜）

35

240

Span
Load

（Source: General Incorporated Association - “Association of Safety
Technology for Scaffold Planks of Plywood”）

0.9m

1.2m

1.5m

1.8m

Concentratedload（kg）

240

180

144

120

Evenly distributed
load
（kg）

480

360

280

240

Test Results and Criteria of Safety Technology of
Scaffold Plywood Planks of Domestic Wood

Bending
strength（N/㎜2)

Young's modulus ofbending（N/㎜2)

ResultSafetyResultSafetyofstandardof
standard
experiment value experiment
value※ The distance between adjacent supporting points shall be 1.8 m or less.

New product

63.0

44.0

11,205

8,820

Product after
3-monthweatheringand exposure
to radiation

59.0

27.5

10,2617,840

KEYTEC VISION

56

Q&A
Products
Q From where does the raw material of wood come?
A Chiba, Yamanashi, Nagano, etc. in Japan, and fromoverseas, Russia, Malaysia, Indonesia are the main
suppliers.
Q What wood species?
A Japanese cedar, Japanese larch, red pine, Siberian
larch, etc. are the main wood species.
Q Can custom-made products be manufactured?
A Of course, yes. Product sizes differ depending on theintended purpose and place of use. We can manufacture custom-made products upon request if the
products of requested sizes can be manufactured.
Q What are the applicable standards of stressed-skinpanels and massive wall panels?

Q Is it possible to request to use local wood of a
speciﬁed region for manufacturing LVL or plywood?
A Generally, yes, but it depends on whether or not it ispossible to get a suitable raw material of wood fromthe speciﬁed region. Please contact us case by case.

Q What is thinned wood?
A Thinned wood is trees coming from the forest afterthinning to prevent trees growing too densely.
Q Do all products meet the requirements of F☆☆☆☆?
A Yes. All of our products are JAS graded as Ｆ☆☆☆☆
or equivalent to Ｆ☆☆☆☆.
※Except plywood for concrete formwork, which is graded as Ｆ☆☆☆.

A These products are manufactured in accordancewith the required speciﬁcations and sizes for particular projects. For further information, such as
relevant standards and application, please contact
our Division of Business Development and R&D.

Adhesives / Insecticides, Preservatives, Anti-Termite Treatments
Q Can your products be treated against rot andtermite attack?

Q When the products are burnt, no toxic substances
are emitted?

A Yes. The preservative or insecticide is mixed in theadhesive, so that the inside of product can betreated well. Like the treatment by pressure impregnation, it is an environmentally friendly and highly
safe treatment.

A No toxic substances such as dioxin are emitted when
our products are burnt.

Q Isnʼt the adhesive bad for environment anda human body?

Q Service life of adhesives?
A It depends on the usage conditions.
In USA there is a 100 years old building in whichsimilar adhesives were used.

A The adhesives used in our products are certiﬁed as
Ｆ☆☆☆☆ .

Support System
Q Please tell how to use products other thanposts/columns and joists/beams.
A Even with the posts/columns and joists/beams, you
can use construction methods, in which longer
spans of frames than those in the conventional post
and beam and wood frame construction methods,
can be constructed. In addition to structural posts/columns, joists/beams and panels, there areproducts suitable for use in massive wall construction and interior ﬁnishing. Feel free to contact uswith any questions. We can forward information onreference projects which can be of interest to you.
Q We cannot understand about structural analysis.
A We are pleased to help you. The experts at Department of Wood Structure Business of one of ourgroup companies can support you.

57 KEYTEC VISION

Q What is the extent of your business activities?
A Project by project, we can design, manufacture anduse products for a particular project. Please contact
us for details.
Q Any seminars held by your company?
A We hold seminars now and then non-periodically. We
announce any scheduled seminar in our HP on the web.
Q Before deciding to use LVL,
we want to make a factory tour.
A Those wishing to make a factory tour, please contact
us in advance.
Q Can you consider developing a new product?
A Please contact us.
We have many experiences of the developments ofvarious structural products and of research works
on ﬁre resistive construction, etc. in cooperation withoutside experts in the past and at the present.

Our Company
Company Outline
Company nameKEYTEC Co., Ltd.

Executive ofﬁcer

Hirokazu Nakanishi / President

Employees

approx. 200 persons

Establishment

April 18, 1958

CapitalJPY 268,400,000.-

Product line

Plywood for general use , Structural Plywood ,Plywood treated with insecticide , Scaffold
planks , Structural LVL , LVL for interiorﬁnishing , I-joist , I-Shaped/girder ,Earthquake-resistant frame , Laminated wood
wall , Stressed-skin panel , Fireproof
structural member/element

Business outline

Manufacturing and sales of plywood,
LVL and other wood based building materials

Major shareholders JK Holdings Co., Ltd.

Employee Stock Ownership Plan of KEYTEC
The Shoko Chukin Bank, Ltd.

Main customers
and sales contacts

SMB Kenzai Co., Ltd.
ITOCHU Kenzai Co., Ltd.
Japan Kenzai Co., Ltd.

Main businessconnections

ITOCHU Corporation
Sumitomo Corporation
Sumitomo Forestry Co., Ltd.
Oshika Corporation

Main bankconnections

Sumitomo Mitsui Banking Corporation /Nihonbashi-Higashi Branch
The Shoko Chukin Bank, Ltd. /Fukagawa Branch

Afﬁliated companies JK Holdings Co., Ltd.

Japan Kenzai Co., Ltd.
JK CARGO Co., Ltd.
Nihon Paneform Co., Ltd.
KEEL WEST JAPAN Co., Ltd.
Akita Glulam Co., Ltd.
KEYBOARD Co., Ltd.

Headquarters, Factory, Delivery Center
Headquarters

Wood Land Tower, 1-7-22 Shinkiba, Koto-ku,
Tokyo, 136-0082 Japan
TEL：03-5534-3741

Kisarazu Factory

FAX：03-5534-3750

15 Mokuzai-minato, Kisarazu-shi,
Chiba, 292-0837 Japan
TEL：0438-36-9311

FAX：0438-37-2102

http://www.key-tec.co.jp/

KEYTEC VISION58

KEYTEC Co., Ltd.
Wood Land Tower, 1-7-22 Shinkiba, Koto-ku, Tokyo, 136-0082 Japan
TEL: 03-5534-3741
http://www.key-tec.co.jp/
Date of issue : September 2018