DEAS 1066 -1:2021 
ICS 91.060.50  
 
© EA C 2021                                                                                                                              First Edition 2021  
 DRAFT EAST AFRICAN STANDARD  
Wooden flush door shutters  of cellular and hollow core type  — 
Specification for — Part 1: Plywood face panels   
EAST AFRICAN COMMUNITY  DAES 1066 -1:2021 
ii © EAC 2021  – All rights reserved  
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Viola tors may be prosecuted . DEAS 1066 -1:2020 
© EAC 2021 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  1 
4.1 Types and designation ................................ ................................ ................................ ..........................  1 
4.2 Size and tolerance  ................................ ................................ ................................ ................................ . 2 
4.3 Materials  ................................ ................................ ................................ ................................ .................  4 
4.3.1  General  ................................ ................................ ................................ ................................ ...................  4 
4.3.2  Timber  ................................ ................................ ................................ ................................ .....................  4 
4.3.3  Plywood  ................................ ................................ ................................ ................................ ..................  4 
4.3.4  Cross -bands  ................................ ................................ ................................ ................................ ...........  4 
4.3.5  Face veneers  ................................ ................................ ................................ ................................ ..........  5 
4.3.6  Adhesive  ................................ ................................ ................................ ................................ .................  5 
4.3.7 Particleboard  ................................ ................................ ................................ ................................ ..........  5 
4.4 Construction  ................................ ................................ ................................ ................................ ..........  5 
4.4.1  Cellular core  ................................ ................................ ................................ ................................ ...........  5 
4.4.2  Hollo w core  ................................ ................................ ................................ ................................ ............  6 
4.4.3  Stiles and rails  ................................ ................................ ................................ ................................ ....... 7 
4.4.4  Levelling  ................................ ................................ ................................ ................................ .................  7 
4.4.5  Face panel  ................................ ................................ ................................ ................................ ..............  7 
4.4.6  Lipping  ................................ ................................ ................................ ................................ ....................  7 
4.4.7  Rebating  ................................ ................................ ................................ ................................ .................  7 
4.4.8  Opening for glazing  ................................ ................................ ................................ ...............................  8 
4.4.9  Venetian  ................................ ................................ ................................ ................................ ..................  8 
4.5 Fitting of locks  ................................ ................................ ................................ ................................ ....... 9 
4.6 Workmanship and finish  ................................ ................................ ................................ .......................  9 
5 Test methods  ................................ ................................ ................................ ................................ .........  9 
5.1 End immersion test  ................................ ................................ ................................ ...............................  9 
5.2 Knife test  ................................ ................................ ................................ ................................ ................  9 
5.3 Adhesion test  ................................ ................................ ................................ ................................ .........  9 
5.4 Type tests  ................................ ................................ ................................ ................................ .............  10 
6 Sampling and criteria for conformity  ................................ ................................ ................................  10 
6.1 Type tests  ................................ ................................ ................................ ................................ .............  10 
6.2 Sampling and acceptance tests  ................................ ................................ ................................ .........  10 
6.3 Criteria for conformi ty................................ ................................ ................................ .........................  10 
7 Marking  ................................ ................................ ................................ ................................ .................  11 
Bibliography  ................................ ................................ ................................ ................................ ......................  12 
 DAES 1066 -1:2021 
iv © EAC 2021  – All rights reserved  
 Foreword  
Development of the East African Standards has been neces sitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standards Bodies in Partn er States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, c onsumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporated before finalization o f standards, in 
accordance with the Principles and procedures for development of East African Standards. XXXXXX.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expec ted to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC/TC: 022 ,  
Attention is drawn to the possibility that some of the elements of this docum ent may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
 WORKING  DRAFT EAST AFRICAN STANDARD  DEAS 1066 -1:2021 
 
© EAC 2021 – All rights reserved  1 
 Wooden flush door shutters  of cellular and hollow core type  — 
Specification — Part 1: Plywood face panels   
1 Scope   
This Draft East Afri ca Standard specifies requirements , sampling and test methods  of cellular and hollow core 
wooden flush door shutters with face panels of plywood or cross -band and face veneers . 
2 Normative references   
The following referenced documents referred to in the t ext in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
ISO 13608, Specification for veneered decorative plywood  
EAS 324, Copper/chromium/arsenic compositions for the preservation of timber — Method for timber 
treatment  
ISO 1804, Doors — Terminology  
ISO 16893 , Wood -based panels — Particleboard  
EAS 24 , Timber ind ustry — Glossary of terms  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions  in EAS 24 and ISO 1804  apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp   
4 Requirements   
4.1 Types and designation  
Cellular or hollow core flush door shutters shall be of the decorative type or non -decorative (paintable) typ e. 
The nature of construction of these shutters shall, therefore, be specified based on the type and construction 
of core as given in Table 1 .  
  
2 © EAC 2021  – All rights reserved  
 Table 1 — Nature of construction of wooden flush door shutter (cellular and hollow core type)   
Core  Type  Abbrev iations  
Cellular  Decorative  CD 
Non-decorative  CN 
Hollow  Decorative  HD 
Non-decorative  HN 
 
4.2 Size and tolerance   
4.2.1  Sizes of the wooden flush door shutters shall generally conform to the modular sizes specified in 
Table 2 (see Figure 1). Sizes ot her than modular sizes, as agreed to between the manufacturer and the 
purchaser, may also be permitted; however, the thickness of shutters in such cases shall not be less than that 
specified against the nearest higher modular size given in 4.2.3 .  
Table 2 — Dimensions of wooden flush door shutters   
Designation of doors  Width  
mm Height  
mm 
min. max.  
8 DS 20  710 1 945  1 945  
8 DS 21  760 1 980  2 045  
9 DS 20  810 2 005  2 030  
9 DS21  860 2 005  2 030  
10 DS 20  900 2 005  2 100  
10 DS 21  915 2 005  2 100  
12 DT  20 1 100  1 905  2 100  
12 DT 21  1 500  2 005  2 100  
NOTE 1  D - Door, S - Single shutter, and T - Double shutter.  
NOTE 2  The designation indicates the size of door openings, the first number referring to width in modules of 100 mm 
and the last number is the height in modules.  
NOTE 3  In arriving at the standard widths and height for wooden flush doors shutters, an allowance of 60 mm has been 
made for door frames, 40 mm for floor finish and 5 mm for clearance all round (see Figure. 1) between door opening and 
door frame and 15 mm for rebate all round for the shutter into the frame.  
 
4.2.2  In case the modular height is taken from the finished floor level, the height of the wooden flush door 
shutters shall be the one given in column 3 of Table 2 for maximum heig ht. In the case of double shutters, the 
rebate and clearance between the shutters shall be as given in 4.4.7 .  
© EAC 2021 – All rights reserved  3 
 
 
Figure 1 — Sketch illustrating dimensions of wooden flush door shutter  
4.2.3  Nominal thickness of shutter shall be 25 mm, 35 mm, 38 mm, 40 mm , 45 mm  or 50 mm . 
4.2.4  It is recommended that as far as possible the thickness adopted for flush door should be as given in 
Table 3.  
Table 3 — Thickness of wooden flush door shutters  
Wooden flush door 
designation  Thickness  
mm 
8 DS 20 and 8 DS 21  25 or 35  
9 DS 20 and 9 DS 21  38 
10 DS 20 and 10 DS 21  40 
12 DT 20 and 12 DT 21  45 or 50  
 
4.2.5  Tolerances shall:   
4 © EAC 2021  – All rights reserved  
 a) on nominal width and height, be +3 and -0 mm ; and  
b) on nominal thickness, be ± 1 .2 mm.  
The thickness of the wooden flush door shutter shall be uniform throughout with a permissible variation of not 
more than 0.8 mm when measured at any two points.  
4.3 Materials  
4.3.1  General  
All plywood, cross -bands and veneers used shall be treated in accordance with 4.3.2.5 b) and 4.3.2.5 c). 
4.3.2  Timber  
4.3.2.1  The t imber for use in the core of wooden flush door shutters shall be of suitable hardwood and/or 
softwood species.  
4.3.2.2  For stiles, rails and lipping only suitable timber species  shall be used.  
NOTE  The suitability of timber for stiles, rails and lipping is  normally based on the screw holding properties of the 
timber. However, in the absence of detailed data relating to screw holding properties of the species, the density of the 
species and the data relating to screw holding properties can be used.  
4.3.2.3  The moisture content in timber used in the manufacture of wooden flush door shutters shall not 
be more than 12 %.  
4.3.2.4  Timber shall be free from decay and insect attack. Knots and knot holes less than half the width 
of cross section of the members in whi ch they occur may be permitted. Pitch pockets, pitch streaks and 
harmless pin -holes shall be permissible except in the exposed edges of the core where members shall be cut 
out and filled in with carefully fitted glued pieces of wood of similar species and character with their grain 
running in the same direction.  
4.3.2.5  Timber and sapwood shall be preservative -treated before assembly as specified below:  
a) trimmed and cut ends shall be given a protective treatment by brush or spray application;  
b) for preservativ e treatment, the timber shall be treated in accordance with EAS 324; and  
c) timber shall be stacked for at least half an hour before drying.  
Timber should be dried to a suitable moisture content before bonding.  
4.3.3  Plywood  
4.3.3.1  Commercial plywood used in  wooden flush door shutters shall be Boil Weather Proof (BWP) 
grade at least Type BC.  
4.3.3.2  Decorative plywood used in wooden flush door shutters shall conform to Grade 1 of ISO 13608.  
4.3.4  Cross -bands  
Cross -bands used in wooden flush door shutters shal l conform to the requirements laid down for BWP grade 
plywood.   
© EAC 2021 – All rights reserved  5 
 4.3.5  Face veneers  
4.3.5.1  Commercial face veneers used in wooden flush door shutters shall conform to the requirements 
laid down for veneers for BWP grade plywood.   
4.3.5.2  Decorative face ven eers used in wooden flush door shutters shall conform to the requirements of 
decorative veneers specified for Grade 1 decorative plywood.  
4.3.6  Adhesive  
Adhesive used shall be phenol formaldehyde synthetic or any other suitable adhesives conforming to Boil  
Weather Proof (BWP) type.  
4.3.7  Particleboard   
Particleboards used for the core of the wooden flush doors shall be either flat platen pressed or extrusion 
pressed type conforming to ISO 16893  and shall be made using phenol formaldehyde adhesive  or any oth er 
suitable adhesives . The swelling of the particleboards in thickness and length when tested shall not exceed 5 
%. 
4.4 Construction   
4.4.1  Cellular core   
Timber frame for holding the core shall be constructed from stiles; and top and bottom rails, each no t less than 
75 mm wide including concealed Iipping where provided . The cellular core shall be of any of the following 
types of construction as specified by the purchaser:  
a) Type A: particleboard, hardboard, wooden or plywood battens, tubular, strips of block s or battens 
strips of not less than 25 mm in width so fixed that each of the voids formed does not exceed 25 cm2 
in area and the volumetric contents of the voids do no t exceed 50 % of the total core volume, that is, 
when measured from edge to edge; or   
b) Type B: rolls, strips, coils or corrugation of veneers not less than 1 mm thick and not less than 100 
mm in length (when fully flat), so fixed that the distance between any two faces of the rolls, strips, 
coils or corrugations, at any place is such that at l east one strip is intercepted by a square of side 200 
mm in any position.   
The voids shall be uniformly distributed throughout the core (see Figure 2).   
6 © EAC 2021  – All rights reserved  
 
 
Figure 2 — Cellular core flush door shutter  (Width and Height in accordance with Table 2)  
4.4.2  Hollow  core  
The timber frame for holding the core shall be constructed from stiles and top, bottom and minimum two 
intermediate rails, each not less than 75 mm wide including concealed lipping where provided  as shown in 
Figure 3. In. each segment, battens not le ss than 25 mm wide shall be fixed in such a way that the voids are 
equally distributed and the void area in any segment is less than 500 cm2. Battens may also be replaced by 
suitable rolls or strips of veneers.  
 
Figure 3 — Hollow core flush door shutter  (Width and Height in accordance with Table 2)    
© EAC 2021 – All rights reserved  7 
 4.4.3  Stiles and rails   
Stiles and rails of wooden flush door shutters shall be of one -piece construction or laminated one -piece 
construction using BWP type of adhesive. Butt (end) joints shall not be permitted  for making -up the length of 
the frame.  
4.4.4  Levelling   
Levelling of surface (not necessarily by planning) shall be carried out during each stage of construction, that 
is; fabrication of core and bonding of the plywood. Thickness of the core, shall be che cked for uniformity 
before bonding the cross -bands and face veneers as the case may be.  
4.4.5  Face panel   
4.4.5.1  The plywood forming the face panel shall not be less than 3 mm in thickness in the case of 
cellular core flush door shutters, and not less tha n 6 mm in thickness in the case of hollow core flush door 
shutters except for 25 mm thick door in which case 4 mm thickness may also be permitted. Two -ply face skin 
construction in a combination of cross -band and face veneers may also be adopted for cellul ar core flush door 
shutters only but in that case, the combined thickness of one cross -band and one face veneer shall not be 
less than 4 mm. The thickness of the face veneers in the plywood shall be between 0.5 mm and 1.5 mm for 
commercial veneers and betw een 0.5 mm and 1.0 mm for decorative veneers. The plywood face skin  
assembly, conforming to these requirements shall be glued  under pressure on both faces of the core.   
4.4.5.2  Application of a decorative face veneer on a finished face panel having veneer in the same 
direction as the proposed veneer shall be avoided. However, where this is unavoidable due to special 
circumstances, the already existing veneer, whether commercial or decorative, shall be so sanded that the 
total thickness of both the existing and applied face veneers together shall not exceed the maximum thickness 
specified, and provided that the thickness of decorative veneer is in no case less than 0.5 mm.  
4.4.6  Lipping  
4.4.6.1  General  
Lipping shall be provided on wooden flush door shutters . Lipping shall be concealed and designated as edge -
band; or exposed as specified by the purchaser. Joints shall not be permitted in the lipping.  
4.4.6.2  Edge -band/internal lipping  
Edge -band/ concealed  lipping shall have a total depth of not less than 25 mm. Edge -band, may be provided 
separately, when it is of a species different from that of backing, or as one piece with the stile, designated as 
frame -cum-lipping, when edge band and backing are of the same species. The overall width shall be as given 
in 4.4.1  unless specifically asked for by the purchaser.  
4.4.6.3  External lipping  
Where provided, shall be solid and measure at least 6 mm on the face of the door.  
4.4.7  Rebating  
In the case of double -leaved wooden flush door shutters, the meeting of the stiles sh all be rebated by one -
third the thickness of shutter. The rebating shall be either splayed or square type as shown in Figure 4. Where 
lipping is provided, the depth of lipping at the meeting of stiles shall not be less than 35 mm.   
8 © EAC 2021  – All rights reserved  
 
 
a) Splayed type            b) Square type  
Figure 4 — Meeting of stiles for double -leaved door shutters  
Where   
t thickness of shutter.  
4.4.8  Opening for glazing  
When required by the purchaser, opening for glazing shall be provided and unless otherwise specified, the 
opening provid ed shall be 25 0 mm in height and 20 0 mm in width. Unless otherwise specified by the 
purchaser, the bottom of the opening shall be at a height of 140 0 mm from the bottom of the shutter as shown 
in Figure 4, for which the glazing shall be lipped internally w ith solid timber opening.  
 
Figure 4 — Typical location of openings for glazing and Venetian  
4.4.9  Venetian  
When required by the purchaser, a Venetian opening shall be provided and unless otherwise specified, the 
height of the opening shall be 30 cm from t he top of the bottom rail. The width of’ the opening shall be as  
© EAC 2021 – All rights reserved  9 
 specified by the purchaser but shall provide a clear space of at least 75 mm between the edge of the door and 
the venetian opening.  
4.5 Fitting of locks  
Wooden flush door shutters shall be sh op-prepared for taking mortice locks or latches as may be ordered. 
Shop -prepared wooden flush door shutters with morticed holes for lock fixing shall be done only when desired 
by the purchaser. Where the purchaser so desires, suitable blocks of wood may be  provided for fixing the 
hardware.  
4.6 Workmanship and finish  
4.6.1  All the four edges of the wooden flush door shutter shall be square. The wooden flush door shutter 
shall be free from twist or warp in its plane.  
4.6.2  Both faces of wooden flush door shut ter shall be sanded to a smooth even texture. If required by the 
purchaser, all surfaces of wooden flush door shutters which are required to be painted shall be covered evenly 
by painting with a priming coat of primer. In the case where shutters are to be polished or varnished, a priming 
coat of suitable polish or varnish shall be given before delivery. However, only unpainted doors shall be 
subjected to the tests mentioned in Clause 5.  
4.6.3  Workmanship and finish of the face panels shall be of commercial type and decorative type.  
5 Test methods  
5.1 End immersion test  
Wooden flush door shutters shall be tested for resistance of their base to immersion in water. The door shutter 
shall be immersed vertically to a height of 30 cm in water at room temperature o f 27 °C ± 2 °C and relative 
humidity of 65 % ± 5 % for 24 h and then allowed to dry for 24 h. The cycle shall be repeated eight times. 
There shall be no delamination at the end of the test.  
5.2 Knife test  
The face panel, when tested shall pass the test.  
5.3 Adhesion test  
5.3.1  The wooden flush door shall be tested for adhesion in accordance with 5.3.2  
5.3.2  Two square sections, 150 mm x 150 mm shall be cut from the corners of the door. These corner 
sections, as cut from the door, shall be immersed in boilin g water at 100 °C for four hours, then dried at 27 °C 
± 2 °C and relative humidity of 65 % ± 5 % for 24 h. At the end of the drying period, the samples shall be 
examined for delamination. Glue lines in all the four exposed edges of the plywood on both face s of a 
specimen and the glue lines between the plywood faces and the stile and rail shall be examined for 
delamination.  
5.3.3  A specimen shall be considered to have passed the test if no delamination has occurred in the glue 
lines in the plywood and if no single delamination more than 50 mm in length and more than 3 mm in depth 
has occurred in the assembly glue lines between the plywood faces and, the stile and rail. Delamination at the 
corner shall be measured continuously around the corner. Delamination a t a knot, hole, pitch pocket, worm 
hole, or other permissible wood defects shall not be considered in assessing the sample. A door shall be 
deemed to have passed this test if both the specimens tested pass the test.   
10 © EAC 2021  – All rights reserved  
 5.4 Type tests  
The manufacturer may also  have the performance test of the flush door tested by the type tests. The type 
tests shall only apply to the specific design of the flush door and need not be applied as routine tests.  
6 Sampling and criteria for conformity  
6.1 Type tests  
6.1.1  The manufa cturer shall get the type tests done on at least three samples by the standard test 
methods of specified in 5.4.  
6.1.2  The manufacturer shall, on the request of the purchaser, give free of charge, the type test certificate 
regarding type, construction and finish of the wooden flush door shutters.  
6.2 Sampling and acceptance tests  
6.2.1  All wooden flush door shutters of the same type and manufactured under similar conditions of 
production shall be grouped together to constitute a lot.  
6.2.2  The number of woo den flush door shutters to be selected at random from a lot shall depend upon its 
size and shall be in accordance with column 1 and 2 of Table 4.  
Table 4 — Sample size and criteria for conformity  
Lot size  Sample size 
defective  Permissible number 
of defecti ve samples  Sub sample size  
Min Max 
26 50 8 0 1 
51 100 13 1 2 
101 150 20 1 2 
151 300 32 1 3 
301 500 50 2 4 
501 and above  80 2 5 
 
6.2.3  Number and tests of wooden flush door shutters to be carried out shall be in accordance with 6.2.3.1 
and 6.2.3. 2. 
6.2.3.1  The wooden flush door shutters selected as in 6.2.2 shall be inspected for dimensions and 
workmanship and finish.  
6.2.3.2  One end of the shutter shall be tested for using end immersion test. Two samples of 150 mm x 
150 mm shall be cut from the t wo corners at the other end for carrying out glue adhesion test. The knife test 
shall be done on the remaining portion of the flush door shutter. The number of shutters for these tests shall 
be in accordance with column 4 of Table 4 and shall be selected f rom those found satisfactory when inspected 
as-in 6.2.3.1.  
6.3 Criteria for conformity  
6.3.1  The lot shall be considered as conforming to the requirements of this standard, if conditions laid down 
in 6.3.2 and 6.3.3 are satisfied.   
© EAC 2021 – All rights reserved  11 
 6.3.2  The number of woode n flush door shutters failing to satisfy the requirements of any characteristic 
mentioned in 6.2.3.1 shall not exceed the permissible number mentioned in column 3 of Table 4.  
6.3.3  All the wooden flush door shutters when tested according to 4.6, shall sati sfy the requirements of the 
tests. If the number of shutters found unsatisfactory for a test is one, twice the number of shutters initially 
tested shall be selected and tested for that test.  
All the shutters so tested shall satisfy the requirements of the test. If the number of shutters found 
unsatisfactory for a test is two or more, the lot shall be considered as unsatisfactory.  
7 Marking  
Each shutter shall be legibly and indelibly marked on any of its edges with the following information:  
a) name of the manu facturer and trademark, if any;  
b) abbreviation indicating the nature of construction of the shutter;  
c) whether the size of the shutter is ‘Modular ’ or ‘Non -modular’;  
d) designation for modular sizes; or the actual size (width and. height) for modular sizes along with 
appropriate symbols for flush door shutters;  
e) thickness of door shutters ; and  
f) products complying with requirements of this standard shall be marked with a number for this 
standard   
12 © EAC 2021  – All rights reserved  
 Bibliography  
[1] US 1657 -1:2017, Wooden flush door shutters — Specificat ion for cellular and hollow core type — Part 
1: Plywood face panels   
 DEAS 1066 -1:2021   
 
© EAC 2021 – All rights reserved