NewNew Products
Products

Fire-Protection Kits “PUCHIROKU” Series
for the Transfer Section of Partition

1.

INTRODUCTION

necessary for small circular apertures.

The Building Standard Law requires buildings to be compartmented by fire-protection walls or floors per certain
area for the purpose of restraining the spread of fire to alimited extent. It is called a fireproof compartment. Also,
the Law requires the transfer sections in the compartments where cables or plastic pipe penetrate to be fireprotected to prevent the spread of fire along them. Theinstallation methods must obtain certifications by theMinister of Land, Infrastructure and Transportation (hereinafter called a certification).
Furukawa Techno Material has developed the installation methods which meet the various needs for fire protection in the transfer sections. We have obtained certifications for them and then commercialized them.
“PUCHIROKU” series are kit products which have beendeveloped and commercialized for the transfer sectionsof small circular apertures from φ20 mm to φ150 mm ofaperture diameter. The casing structure using a resin
sleeve with a fire protection material inside provides benefits of not only “easy installation” and “capability of reinstallation”, but also “capability of dressing”, which are
Table 1

2.

LINEUP“PUCHIROKU” series has two kinds of products (Table 1):“PUCHIROKU (part number NPR-20 - 50)” for micro aperture diameter in the wall from φ20 mm to φ50 mm, and“PUCHIROKUWIDE (part number PW-75 - 150)” for aperture diameter in the wall and the floor from φ75 mm toφ150 mm.
As shown in Figure 1, both products are the kit products which have all the necessary member of frameworkneeded for a fire-protected aperture. If the installation site
and the aperture radius are decided, the product and thepart number can be easily selected.

3.

CONSTRUCTION

Figure 2 shows the construction of “PUCHIROKU”. First,
engage the half-cut resin sleeves with the intumescentmaterial inside and insert it into the aperture area. Then,
fill up 5 mm of the heat-resistance seal material between

PUCHIROKU series lineup.
Aperture radius (mm)φ20Application
site

φ40

φ50

PUCHIROKU(Certified by the Minister ofLand, Infrastructure andTransportation)
Wall: PS060WL-0435,
0436

WallNormalaperture

NPR-20 NPR-40 NPR-50

Metallicconduit pipe

No certification

FloorNo certification

φ75φ100

φ125φ150

PUCHIROKUWIDE(Certified by the Minister of Land,
Infrastructure and Transportation)
Wall: PS060WL-0367,0368
Floor: PS060FL-0510

PW-75 PW-100

No certification
PW-125 PW-150

Resin sleeve
CablesHeat-resistanceseal material
Intumescent material

Compartmentation wall

Figure 2

Construction of PUCHIROKU.

steel dressing cap
Heat-resistance seal material
CablesIntumescent material
Compartmentation wall

Figure 1

Parts of the kit (PUCHIROKUWIDE).

Figure 3

Construction of PUCHIROKUWIDE (for wall).

Furukawa Review, No. 41

201219Fire-Protection Kits “PUCHIROKU” Series for the Transfer Section of Partition

the cables and the aperture.
“PUCHIROKUWIDE” is a large version of PUCHIROKU.
As shown in the Figure 3, a steel dressing cap is used tofix with the screw.

4

conduit pipe (PF/ CD pipe).
5.5 Good Installation Finish
Because there is almost no protuberance from the wall or
the floor, the finish is good.

INSTALLATION CONDITION

Table 2 shows the installation conditions of “PUCHIROKUseries”.
They are applicable to the transfer sections of the compartments in condominium buildings and in office buildings, the parting walls in apartment buildings, and thepartition walls in schools, hospitals and child welfare
buildings (compartments ruled in the Building Standard
Law Enforcement Order article 114). All of the above are
the main examples of the application.
Also, except for some cases, installation is possible
from one side of the wall and from above the floor.

Table 3PUCHIROKU

Installation condition.

PUCHIROKUPUCHIROKUWIDE
Construction of wall or floor
certified by the Minister of Land, Thickness Installation Thickness Installation
Infrastructure and Transportation(mm)
condition(mm)
condition

Normalaperture

Reinforced orGreater or
Autoclaved lightweight equal toaerated concrete70

One sideGreater or
equal to80

One sideGreater orBoth sides
equal to 80

Thin wall

Greater or
One sideequal to 42

Out of certification

Metallic autoclaved lightweightaerated concrete
conduitpipe
Middle-spacepartition wall

Out of certification

Greater or
equal to Both sides
80

Reinforced or
autoclaved lightweightaerated concrete

Out of certification

Greater or
equal to100

Wall

Middle-spacepartition wall

Reinforced or

Floor

5.

Above
floor

PUCHIROKUWIDE
Wall

Applicable cableand pipe

Wall

Normalaperture

Floor

Metallic
conduit pipe

Cable (Conductorcross section: mm2)

Less or equal Less or equal Less or equal Less or equal
to 38
to 150
to 325
to 250

Pliable plastics conduit pipe (nominaldiameter)

PF/CD pipe
less or equal
to 28

Application to cableand conduit

Impossible

6.
Table 2

Applicable cable and pipe.

PF pipe: lessor equal to 28

PF/CD pipe
less or equal
to 36

Possible

PURPOSE6.1 PUCHIROKUWith the spread of demand for cable and optical televisions including the Internet and the video delivery, theiradoption rates are high especially in the existing buildings such as elder care facilities, school-related facilities,
medical- related facilities and accommodation facilities.
Those buildings have the transfer sections of small aperture to install several related cables. PUCHIROKU is usedin such areas (Figure 4).
Other than that, PUCHIROKU is used in various transfer
sections of small aperture such as for the power cabletransfer sections of small aperture in apartment buildings
and interphone power cable transfer sections in condominium buildings.

PROPERTIES

5.1 Easy Installation
The installation is finished only by inserting the resin
sleeve and then filling up the heat-resistance seal (in thecase of WIDE, fixing with a screw is needed afterward).
Because no special tools and skilled techniques areneeded, anyone can easily install them.
5.2 Stable Installation Quality
Because the installation is a quantitative installation using
the resin sleeve with an intumescent material inside, anyone can install them with a consistent quality.
5.3 Capability of Reinstallation
Because the once-installed resin sleeve and heat-resistance seal can be uninstalled easily and used again, they
can be easily applied to rewiring work.
5.4 Applicable to Pliable Plastics Conduit pipe
As shown in Table 3, they can be installed in the aperturearea wired with cables and also with a pliable plastics

Figure 4

Example of PUCHIROKU installation(in welfare facility).

6.2 PUCHIOROKUWIDE
It is used in the following places: the floor transfer sec2
tions of the line cables (600 V CVT100 - 250 mm , etc.)
constructed in the meter box of condominium buildings
and in the pipe shafts of office buildings, the floor and thewall transfer sections of mixed cables (cables and pliable
plastics conduit pipe (PF pipe, etc.)) in stores, hospitals
and school-related facilities.

Furukawa Review, No. 41

201220Fire-Protection Kits “PUCHIROKU” Series for the Transfer Section of Partition

7.

PATENT, TRADEMARK“PUCHIROKU” has been patented and “PUCHIROKUWIDE”
is patent pending. Both are pending for trademark registration.

8.

CONCLUSION

We have developed and commercialized “PUCHIROKUseries”. Its casing structure has achieved easy-construction and capability of reconstruction required for thetransfer sections of small circular aperture.
In the future, we will obtain an evaluation of the Fire
Equipment and Safety Center of Japan Foundation basedon the certifications of the Minister of Land, Infrastructure
and Transportation. After obtaining the evaluation, we will
progress on the commercialization with an expanded
range of application which can be applied to the transfer
sections in apartment buildings ruled by the Fire Defense
Law.
For more information, please contact:
Market Development section
Market Development department
Fire Prevention Division
Furukawa Techno Material Co., Ltd.
TEL: +81-463-24-9341 FAX: +81-463-24-9346

Furukawa Review, No. 41201221