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भारतीय मानक IS 710 : 2024

Indian Standard

समद्रु ी उपयोग के लिए प्िाईवडु — लवलिलि

( तीसरा पुनरीक्षण )

Marine Plywood — Specification

( Third Revision )

ICS 79.060.10

 BIS 2024

भारतीय मानक ब्यरू ो

BUREAU OF INDIAN STANDARDS
मानक भवन, 9 बहादरु िाह ज़फर मागग, नई लदल्िी - 110002
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI - 110002
www.bis.gov.in www.standardsbis.in

March 2024 Price Group 7

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Wood and Other Lignocellulosic Products Sectional Committee, CED 20

FOREWORD

This Indian Standard (Third Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by
the Wood and Other Lignocellulosic Products Sectional Committee had been approved by the Civil Engineering
Division Council.

Plywood used in construction, repair and maintenance of marine and river craft is required to withstand rigorous
conditions involving changes in temperature, humidity and alternate wetting and drying. In addition, they also
need to withstand attack by marine organisms. Plywood used for general purposes is found to be unsuitable for
such applications.

This standard on marine plywood was first published in 1957 and subsequently revised in 1976 and 2010. In this
revision, the following major modifications have been incorporated:

a) Material clause for timber has been modified;

b) Dimension clause has been modified;
c) Modulus of Rupture (MOR), Modulus of Elasticity (MOE) and tensile strength requirements have been
modified;
d) Requirements for formaldehyde content for oven dry board and the steady-state formaldehyde emission
(optional) have been added; and
e) Marking clause has been modified.

A scheme of labelling environment friendly products known as ECO-Mark has been instituted at the instance of
the Ministry of Environment, Forests and Climate Change, Government of India. The ECO-Mark is administered
by the Bureau of Indian Standards (BIS) under the Bureau of Indian Standards Act, 2016 as per
the Resolution No. 71 dated 21 February 1991 and Resolution No. 425 dated 20 October 1992 published in the
Gazette of the Government of India. For a product to be eligible for ECO-Mark, it shall also carry the Standard
Mark (ISI Mark) of BIS besides meeting additional environment friendly requirements. For this purpose, the
Standard Mark of BIS would be a single mark being a combination of the ISI Mark and the ECO-Mark.
Requirements to be satisfied for a product to qualify for the BIS Standard Mark for Eco-friendliness, will be
optional. Manufacturing units will be free to opt for ISI Mark alone also.

The ECO criteria is based on the Gazette Notification No. 170 dated 16 May 1996 for wood substitutes as
environment friendly products published in the Gazette of Government of India, as revised/amended from time to
time.

This standard contributes to the United Nations Sustainable Development Goal 9 ‘Industry innovation and
infrastructure’ Build resilient infrastructure promote inclusive and sustainable industrialization and foster
innovation.

The composition of the Committee responsible for the formulation of the standard is given in Annex E.

For the purpose of deciding whether a particular requirement of this standard is complied with the final value,
observed or calculated, expressing the result of a test or analysis shall be rounded off in accordance with
IS 2 : 2022 ‘Rules for rounding off numerical values (second revision)’. The number of significant places retained
in the rounded off value should be the same as that of the specified value in this standard.
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IS 710 : 2024

Indian Standard

MARINE PLYWOOD — SPECIFICATION

( Third Revision )
1 SCOPE 5 MANUFACTURE

This standard covers the requirement for materials, 5.1 Veneers

manufacture and performance of marine plywood
suitable for the construction, repair and maintenance The veneers shall be either rotary cut or sliced. The
of marine and river craft, pontoons and the like. veneers shall be reasonably smooth to permit an
even spread of glue. The veneers shall be
2 REFERENCES conditioned to a moisture content in the range of
6 percent to 10 percent before bonding.
The standards listed in Annex A contain provisions,
which through reference in this text, constitute 5.1.1 Defects in Veneers
provisions of this standard. At the time of
publication, the editions indicated were valid. All The veneers to be used for the faces shall be free
standards are subject to revision and parties to from sapwood. Core veneers may contain sound
agreements based on this standard are encouraged to knots, whose maximum dimension in any one
investigate the possibility of applying the most direction does not exceed 50 mm, and open defects
recent edition of these standards. (split and check), provided such defects do not
impair the smooth finish of the surface required for
3 TERMINOLOGY painting or staining. Dead knots shall not be
permissible. Overlaps or pleats shall not be allowed.
For the purpose of this standard, the definitions
given in IS 707 shall apply. 5.2 Assembly
4 MATERIALS 5.2.1 Glueing
4.1 Timber The glue shall be evenly spread and the veneers shall
4.1.1 Any species of timber may be used for be securely glued together without overlap. No
manufacturer of plywood. It is recommended to unglued areas or starved joints shall be found on
use wood from sources other than natural forests separation of veneers.
includes, Tree Outside Forest (TOF), rubber,
coconut, cashew, walnut, agroforestry, farm 5.2.2 Thickness of Veneers
forestry, industrial and social forestry plantations,
etc and shade trees from tea and coffee estates in The thickness of veneers shall be uniform, within a
plywood manufacturing. A list timber species is tolerance of ± 5 percent. Corresponding veneers
given in Annex B for guidance purpose. Imported on either side of the central ply and those of face
timber may also be used in manufacturing of (top) and back (bottom) veneers shall be of species
plywood. having similar physical and mechanical properties,
such as, density, modulus of elasticity, shrinkage,
4.1.2 In selecting the species for the manufacture of etc to ensure balanced construction and shall also
plywood, it is recommended that as far as possible a be cut by the same method, that is, either all rotary
single species of timber shall be used and where cut or all sliced.
combinations of different species are used, care
shall be taken to prevent incompatibility of the two In the case of 3 ply boards, the thickness of the
species. centre veneer (core) shall be at least equal to that of
one of the face (top) veneers, but shall not exceed
4.2 Adhesive the combined thickness of the two surface veneers.
The adhesives used for bonding the veneers shall be 5.2.3 Joint in Veneers
based on any suitable synthetic resin conforming to
BWP Type of IS 848. Extender shall not be added 5.2.3.1 Veneers, which require to be jointed to form
to the adhesive by the plywood manufacturer. a ply, shall be spliced before assembly. All joints
Fillers, if used, shall not exceed 10 percent by mass shall be cut square. Tapes, other than fusible tapes,
of solid content of the glue. shall not be used internally and when used for

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IS 710 : 2024

making edge joints or repairing splits in face veneers 5.3 Treatment

they shall be removed subsequently. Fusible tapes
shall be such that they are converted in the process The board shall be given treatment by pressure
of manufacture, to an adhesive that complies with impregnation with fixed type either water soluble or
the test requirements applicable to the adhesive used oil-based preservatives and having retention of
for the manufacture of the plywood. a minimum of 12 kg/m3 in case of ACC
(acid-copper-chrome) or CCB (copper-chrome-
5.2.3.2 Edge joints boron) compositions as specified in IS 10013
(Part 1) and (Part 3) respectively or 100 kg/m3 in
Edge joints in veneers shall be made on a tapeless case of creosote or creosote-fuel oil composition as
splicer or by fusible tape and staggered not less than specified in Annex A of IS 5539, with adequate
25 mm as between any veneer and the next one with penetration.
the same grain direction on both the faces.
5.4 Moisture Content
5.2.3.3 End joints
Finished plywood boards shall have moisture
End joints shall be permitted in all veneers forming content not less than 5 percent and not more than
the core ply and in the veneers of face plies of panels 15 percent at any time of the year depending on the
provided the length of such panels is over 2 m. All part of the country where the test is carried out
such joints shall be accurately scarfed with an (see IS 287).
inclination not steeper than 1 in 10 and bonded
with an adhesive complying with the requirements 6 DIMENSIONS
specified in 4.2.
6.1 Any dimensions (length and width) and number
5.2.3.4 Scarf joints of ply as agreed to between the manufacturer and
the purchaser may be used, and shall be declared
When sizes larger than available press size are by the manufacturer. Prevailing dimensions
required, boards to the required size shall be made (length × width) of plywood boards are as given
with proper scarf joints through the thickness of the below:
board, with the prior approval of the purchaser. The
number and location of scarf joints shall be as agreed a) 2 440 mm × 1 220 mm;
to between the purchaser and the manufacturer.
b) 2 135 mm × 1 220 mm;
All scarf joints shall be bonded with the same
c) 2 135 mm × 915 mm;
adhesive used for the manufacture of the plywood
and shall be made with an inclination not steeper d) 1 830 mm × 1 220 mm; and
than 1 in 10. The species of timber in corresponding
plies of adjacent board scarfed together shall be the e) 1 830 mm × 915 mm
same.
6.2 Thickness
5.2.4 Grain Direction
The thickness of the plywood boards shall be 3 mm,
Unless otherwise specified by the purchaser and 4 mm, 5 mm, 6 mm, 9 mm, 12 mm, 15 mm, 19 mm,
except in boards comprising an even number of 22 mm and 25 mm.
plies, the direction of grain of the veneer in adjacent
NOTE — Any other thickness as agreed to between the
plies shall be at right angles to each other and that of
manufacturer and the purchaser may also be used.
the outer plies shall run parallel to the length of the
sheet. In boards comprising an even number of 6.3 Squareness and Edge Straightness
plies, the grain of the centre pair shall follow the
same direction. In adjacent plies in which the grains Edge straightness and squareness shall be tested
are required to be at right angles to each other, a as per Annex C.
deviation not exceeding 10° may be permitted. In
all cases, the grain on both faces of the assembled 6.4 Tolerances
boards shall run in the same direction. The grain of
the veneer shall normally be parallel to the edges of Tolerance on the nominal sizes of finished boards
rectangular boards, but for other grain direction, for shall be as given in Table 1.
example diagonal, it may be as agreed to between
the purchaser and the supplier.

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Table 1 Tolerances on Dimensions of Plywood for General Purposes

(Clause 6.4)

Sl No. Dimension Tolerance

(1) (2) (3)

i) Length + 6 mm
– 0 mm
ii) Width + 3 mm
– 0 mm
iii) Thickness
± 10 percent
a) less than 6 mm; and
± 5 percent
b) 6 mm and above
iv) Squareness, Max 2 mm/1 000 mm or 0.2 percent
v) Edge straightness, Max 2 mm/1 000 mm or 0.2 percent

7 WORKMANSHIP AND FINISH be less. The edge of the board shall be trimmed
square.
7.1 The face (top) and back (bottom) of the finished
boards shall be free from checks, splits, gaps 8 SAMPLING AND CRITERIA FOR
(subject to provisions given in 7.4), blisters, CONFORMITY
harmful discolouration, any kind of decay, pleats
and overlaps, insect holes, dead or loose knots and The method of drawing representative samples and
live knots whose maximum dimensions in any the criteria for conformity shall be as prescribed in
direction exceed 25 mm. The plywood shall be IS 7638.
free from warp.
9 PHYSICAL AND MECHANICAL
7.2 Sound knots of diameter 25 mm and less shall be REQUIREMENTS
permitted provided the centre-to-centre distance
between any two such knots is not less than 300 mm. 9.1 The plywood shall conform to the requirements
given in 9.3 to 9.11.
7.3 The face (top) shall be free from any patches,
but on the back (bottom), patches at distances of 9.2 Unless otherwise specified in this standard, six
not less than 600 mm apart shall be permissible. test specimens, cut from each of the plywood
The maximum dimension of any one patch shall be selected as in 8 for tests specified in 9.3 to 9.9.
not more than 40 mm. For formaldehyde content and steady-state
formaldehyde emission test, specimens shall be
7.4 Splits, gaps and open joints shall not be taken as per IS 13745 and IS/ISO 12460 (Part 1)
permitted in core. These may be permitted in face respectively.
(top) provided the gap or opening does not exceed a
width of 0.5 mm. If exceeding 0.5 mm, this may be 9.3 Moisture Content
rectified by well fitted veneer inserts of a minimum
width of 5.0 mm provided the grain of the veneer The moisture content of test pieces cut from each
does not exceed in deviation by more than board selected as under 9.2 shall not exceed
10 percent from the grain direction of the 15 percent nor be less than 5 percent when
surrounding veneer. determined by the method described in IS 1734
(Part 1).
7.5 The finish shall be reasonably smooth, and
sanding shall be given to both the sides if so required 9.4 Glue Adhesion in Dry State
by the purchaser.
9.4.1 Glue Shear Strength
7.6 The minimum width of the veneers used in face
(top) and back (bottom) of the boards shall be not When tested for glue adhesion by the method
less than 75 mm except at the edges, where it may described in IS 1734 (Part 4), the average failing

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IS 710 : 2024

load shall be not less than 1 350 N and no individual described in IS 1734 (Part 5) shall be considered as decisive.
In case of even number of plies where the grains of central
value shall be less than 1 100 N. plies follow the same direction the result as obtained from
knife test shall be considered as final.
9.4.2 Adhesion of Plies
9.5.2 The specimens shall be subjected to constant
The adhesion of plies shall be tested by forcibly steam pressure for a definite duration inside a
separating the layers. The veneers shall offer vacuum steam pressure test apparatus as described
appreciable resistance to separation and the in Annex D and thereafter subjected to tests as per
fractured samples shall show some adherent fibres 9.5.1.1 and 9.5.1.2.
distributed more or less uniformly. Adhesion may
also be tested by knife test method described in 9.6 Tensile Strength
IS 1734 (Part 5).
The tensile strength when determined by the method
NOTE — In case, a definite result is not obtainable by the
method described in IS 1734 (Part 4), the result of knife test
described in IS 1734 (Part 9) shall comply with the
described in IS 1734 (Part 5) shall be considered as decisive. following values:
In case of even number of plies, where the grains of central
plies follow the same direction then the result as obtained a) Tensile strength shall be not less than
from knife test shall be considered as final.
36.0 N/mm2 in the direction parallel to grain
direction of the face veneers;
9.5 Water Resistance Test
b) Tensile strength shall be not less than
The specimens shall be subjected to any one of the 29.0 N/mm2 in the direction of right angles
tests specified in 9.5.1 and 9.5.2. The test specimen to the grain direction of the face veneers;
for carrying out test as per 9.5.1.1, shall be as and
specified in IS 1734 (Part 5). Six test pieces each of
c) Sum of the tensile strength in both directions
approximately 250 mm × 100 mm size, shall be cut
shall be not less than 84.5 N/mm2.
from any position in the board such that the grain of
the face veneer is parallel to the length of the piece
If the plywood contains scarf joints, half the
for carrying out test as per 9.5.1.2.
specimen subjected to testing shall contain the joint.
9.5.1 The specimens shall be kept submerged in a
9.7 Mycological Test
pan of boiling water for a period of 72 h. The
period of 72 h of boiling may be a continuous
The test for resistance to micro-organism shall be
period or an aggregate of smaller periods of
carried out by the method described in
boiling, if the test piece is left in cold water
IS 1734 (Part 7). When tested, the test piece shall
between these smaller periods. These test pieces
show no appreciable signs of separation at the edges
shall then be removed from the boiling water and
of the veneers and shall comply with the
cooled down to room temperature by plunging
requirements as specified in 9.5.
them in cold water. These test specimens, while
still in wet condition, shall be subjected to tests
9.8 Static Bending Strength
described under 9.5.1.1 and 9.5.1.2.
Three test specimens taken in each direction from
9.5.1.1 Glue shear strength
the sample of plywood, when tested in accordance
with IS 1734 (Part 11) shall have an average and a
When tested for glue shear strength by the method
minimum individual value of modulus of elasticity
described in IS 1734 (Part 4), the average failing
and modulus of rupture not less than the values
load shall be not less than 1 000 N and no individual
specified in Table 2.
value shall be less than 800 N.
9.9 Wet Bending Strength
9.5.1.2 Adhesion of plies
Three test specimens taken in accordance with
The adhesion of plies shall be tested by forcibly
IS 1734 (Part 11) and from each direction of a
separating the layers. The veneers shall offer
sample of plywood, shall be subjected to cyclic test
appreciable resistance to separation and the
for 3 cycles, each cycle consisting of 4 h boiling in
fractured sample shall show some adherent fibres
water and 16 h drying in an oven at 65 °C ± 2 °C or
distributed more or less uniformly. Adhesion may
of 72 h of boiling. The samples shall be then kept
also be tested by knife test method described in
in water at 27 °C ± 2 °C for 1 h and thereafter
IS 1734 (Part 5).
tested as per IS 1734 (Part 11). The duration of
NOTE — In case a definite result is not obtainable by the
boiling/drying in oven may be split into shorter
method described in IS 1734 (Part 4), the result of knife test intervals by keeping the samples at 27 °C ± 2 °C in

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IS 710 : 2024

water (in case of boiling) or in air (in case of drying). 9.11 Formaldehyde Content Test
The sample shall have an average and minimum
individual modulus of elasticity and modulus of Test of free formaldehyde content in the sample
rupture not less than the values specified in Table 3. shall be done by perforator method as per IS 13745
and test results of drawn sample shall meet the
Table 2 Minimum Values for MOE and MOR requirements of formaldehyde content as follows:
(Clause 9.8)
a) Formaldehyde < 8 mg/100 g of oven dry
Class, 𝐸1 sample; and
Sl Requirement Along Across
No. the the b) Formaldehyde > 8 mg/100 g of oven dry
Face Face Class, 𝐸2 sample and < 30 mg/100 g
Grain Grain of oven dry sample.
(1) (2) (3) (4)
i) Modulus of Elasticity 9.12 Steady-State Formaldehyde Emission Test
(MOE), N/mm2: (Optional Test)
a) Average; 6 400 4 600 Manufacturer will offer a stack of plywood made
and
under a batch (not less than 50 pieces) bearing the
b) Minimum 5 700 4 100
batch number and date of manufacture, along with
individual
details of plywood that is grade, size and thickness,
ii) Modulus of Rupture adhesive used and any other (the manufacture wish
(MOR), N/mm2: to inform). After sampling, the sample shall be
a) Average; immediately covered in airtight polythene with date
43 35
and of sampling on the plywood.
b) Minimum 38 31 Sample must be taken for test within 24 h of opening
individual the airtight cover and within one month from the
date of sampling and test shall be done by the test
Table 3 Minimum Values for MOE and MOR method as given in IS/ISO 12460 (Part 1). The test
(Wet Bending Strength) results of drawn sample shall meet the requirements
(Clause 9.9) of formaldehyde emission value as follows:

Sl Requirement Along Across a) Formaldehyde Class, 𝐸1 < 0.124 mg/m3;

No. the the and
Face Face
b) Formaldehyde Class, 𝐸2 > 0.124 mg/m3.
Grain Grain
(1) (2) (3) (4)
10 ADDITIONAL REQUIREMENTS FOR
i) Modulus of Elasticity ECO-MARK
(MOE), N/mm2:
a) Average; 3 200 2 300 10.1 General Requirements
and
b) Minimum 2 900 2 100 10.1.1 The plywood shall conform to the
individual requirements of quality specified in this standard.

ii) Modulus of Rupture 10.1.2 The manufacturer shall produce to

(MOR), N/mm2: Bureau of Indian Standards, the environmental
a) Average; 21 17 consent clearance from State Pollution Control
and Board as per the provisions of the Water
(Prevention and Control of Pollution) Act, 1974
b) Minimum 19 15 and Air (Prevention and Control of Pollution) Act,
individual 1981 and Water (Prevention and Control or
Pollution) Cess Act, 1977 along with the
9.10 Retention of Preservative authorization, if required under the Environment
(Protection) Act, 1986, while applying for
When tested as per IS 2753 (Part 1 and Part 2) the Eco-Mark appropriate with enforced rules and
plywood shall have a retention of preservative as regulations of Forest Department.
specified in 5.3.

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10.2 Specific Requirements 11.2 Following additional information may be

marked on each plywood:
The plywood shall conform to the specific
a) Number of plies; and
requirements given for ECO-Mark under relevant
clauses of the standard. b) Trade name of timber species used in
manufacturing of plywood (see IS 1150).
NOTE — The manufacturer shall provide documentary
evidence by way of certificate or declaration to Bureau of
Indian Standards, while applying for ECO-Mark.
11.3 BIS Certification Marking

11 MARKING The product(s) conforming to the requirements of

this standard may be certified as per the conformity
11.1 Each plywood board shall be legibly and assessment schemes under the provisions of the
indelibly marked or stamped with the following: Bureau of Indian Standards Act, 2016 and the
Rules and Regulations framed there under, and the
a) Manufacturer’s name and his initials or his products may be marked with the Standard Mark.
recognized trade-mark, if any;
b) In words ‘MARINE PLYWOOD’; 12 DELIVERY
c) Formaldehyde Class; Unless otherwise specified, the plywood boards
d) Nominal length, width and thickness of shall be delivered in a clean condition and shall be
plywood; suitably packed according to normal trade. For
ECO-Mark, the material used for packaging of the
e) Month and year of manufacture; plywood shall be recyclable, reusable or
f) Batch No.; and biodegradable.

g) Criteria for which the plywood has been

labelled as ECO-Mark (if applicable).

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ANNEX A

(Clause 2)

LIST OF REFERRED STANDARDS

IS No. Title IS No. Title

IS 287 : 1993 Permissible moisture IS 2753 Methods for estimation of

content of timber used for preservatives in treated
different purposes — timber and in treating
Recommendations (third solutions:
revision)
(Part 1) : 1991 Determination of copper,
IS 707 : 2011 Timber technology and arsenic, chromium, zinc,
utilization of wood, boron, creosote and fuel oil
bamboo and cane — (first revision)
Glossary of terms (third
revision) (Part 2) : 2014 Determination of copper
(in copper organic
IS 848 : 2006 Synthetic resin adhesives preservative salt) (second
for plywood (phenolic revision)
and aminoplastic) —
Specification (second IS 5539 : 1969 Specification for preservative
revision) treated plywood

IS 1150 : 2000 Trade names and IS 7638 : 1999 Wood/lignocellulosic

abbreviated symbols for based panel products —
timber species (third Methods of sampling
revision) (second revision)

IS 1734 Methods of test for IS 10013 Specification for

plywood: water soluble type
wood preservative:
(Part 1) : 1983 Determination of density
and moisture content (Part 1) : 1981 Acid-copper-chrome (ACC)
(second revision) wood preservative

(Part 4) : 1983 Determination of glue (Part 3) : 1981 Copper-chrome-boron

shear strength (second (CCB) wood preservative
revision)
IS/ISO 12460-1 : Wood based panels —
(Part 5) : 1983 Test of adhesion pf piles 2007 Determination of
(second revision) formaldehyde release:
Part 1 Formaldehyde
(Part 7) : 1983 Mycological test (second emission by the 1-cubic-
revision) metre chamber method

(Part 9) : 1983 Determination of tensile IS 13745 : 2020 Method for determination

strength (second revision) of formaldehyde content in
wood-based panels by
(Part 11) : 1983 Determination of static extraction method called
bending strength (second perforator method (first
revision) revision)

To access Indian Standards click on the link below:

https://www.services.bis.gov.in/php/BIS_2.0/bisconnect/knowyourstandards/Indian_standards/isdetails/

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ANNEX B
(Clause 4.1.1)
LIST OF PREVALENT TREE OUTSIDE FOREST (TOF) SPECIES FOR PLYWOOD

Sl No. Botanical Name Trade Name Abbreviation

(1) (2) (3) (4)

i) Acrocarpus fraxinifolius Mundani MUN
ii) Ailanthus spp. Maharukh MAH
iii) Albizia chinensis Merr. Siris SIR
iv) Alstonia scholaris Chatian CHT
v) Anacardium occidentale Cashew CAH
vi) Bischofia javanica Uriam URI
vii) Chukrasia tabularis Chickrassy CHI
viii) Delonix spp. Gulmohur GUM
ix) Duabanga grandiflora Lampati LAP
x) Eucalyptus Eucalyptus EUC
xi) Grevillea robusta Silver oak SOA
xii) Hevea brasiliensis Rubber wood RUB
xiii) Khaya spp. Lambu LAB
xiv) Leucaena leucocephala Subabul SUB
xv) Macaranga spp. Vatta MCR
xvi) Maesopsi seminii Umbrella tree UMB
xvii) Melia azedarach Linn. Bakain PLI
xviii) Melia composita/dubia Malabar neem MNE
xix) Neolamarckea cadamba Kadam KAD
xx) Pinus spp. Pine PNE
xxi) Populus spp. Poplar POP
xxii) Samanea saman Saman SAM
xxiii) Toona ciliata Toon TOO
xxiv) Swietenia spp. Mahogony MAG

ANNEX C
(Clause 6.3)
METHOD OF TEST FOR EDGE STRAIGHTNESS AND SQUARENESS

C-1 PROCEDURE FOR EDGE STRAIGHTNESS be measured to the nearest milimetre and recorded.

The straightness of the edges and ends of plywood C-2 PROCEDURE FOR SQUARENESS
shall be verified against a straightedge not less than
the full length of the plywood. If the edge on the The squareness of plywood shall be checked with a
end of plywood is convex, it shall be held against 1 200 mm × 1 200 mm square, by applying, one
the straightedge in such a way also give arm of the square to the plywood. The maximum
approximately equal gap at each end. The largest width of the gap shall be recorded.
gap between the straightedge and the edges shall

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ANNEX D
(Clause 9.5.2)
ALTERNATE METHOD FOR WATER RESISTANCE TEST

D-1 Pure water shall be filled in boiler of the chamber, the vacuum pumpshall be switched off, the
vacuum steam pressure test (VPT) apparatus as vacuum inlet valve closed and boiler valve
shown in Fig. 1 to the marking of minimum water connected to main chamber opened. The time shall
level on glass water level indicator and the boiler be noted the moment the steam pressure in the
shall be switched on with the valve connecting the main chamber reaches 220+10 kPa and same
boiler and main chamber in closed condition. The −0
pressure shall be maintained for 6 h. The system
test specimen(s) shall be placed in the working
(main) chamber and shall be closed air tight with and boiler then shall be switched off. The steam
cover. The vacuum pump shall then be switched release valve and vacuum release value shall slowly
on and vacuum inlet valve shall be kept in open be opened until the steam in the chamber is
condition. The steam release valve shall be kept in completely evacuated. The samples shall then be
closed condition. After the required vacuum of kept in water for 1 h at 27 °C ± 2 °C. The samples
110
+10
kPa has been created inside the main shall thereafter be tested as per 9.5.1.1 and 9.5.1.2.
−0

FIG. 1 TYPICAL SKETCH OF VACUUM STEAM PRESSURE TEST (VPT) APPARATUS

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IS 710 : 2024

ANNEX E
(Foreword)
COMMITTEE COMPOSITION
Wood and Other Lignocellulosic Products Sectional Committee, CED 20

Organization Representative(s)

Institute of Wood Science & Technology, Bengaluru DR M. P. SINGH (Chairperson)

Balaji Action Buildwell, New Delhi SHRI RAJESHWAR NAIR

SHRI VIVEK JAIN (Alternate)

Bamboo Society of India, Bengaluru SHRI PUNATI SRIDHAR

DR S. R. SHUKLA (Alternate I)
DR JAGADISH VENGALA (Alternate II)

Central Building Research Institute, Roorkee SHRIMATI HEMALATA

DR JEESHAN KHAN (Alternate I)
SHRI PRASANTA KAR (Alternate II)

Central Institute of Coir Technology, Bengaluru DR O. L. SHANMUGASUNDARAM

SHRIMATI SUMY SEBASTIAN (Alternate)

Central Public Works Department, New Delhi CHIEF ENGINEER (CSQ)

SUPERINTENDENT ENGINEER (TAS) (Alternate)

Century Plyboard India Ltd, Kolkata SHRI AJAY BALDAWA

SHRI JAGANNATH DAS (Alternate)

CSIR - Advance Materials and Processes Research DR ASOKAN PAPPU

Institute (AMPRI), Bhopal

Federation of Indian Plywood & Panel Industry, DR C. N. PANDEY

New Delhi SHRI JAYDEEP CHITLANGIA (Alternate)

Greenpanel Industries Limited, Tirupati SHRI SUBHASH KUMAR AGARWAL

DR PURSHOTTAM (Alternate)

Greenply Industries Ltd, Kolkata SHRI ARABINDA SAHA

Institute of Wood Science & Technology, Bengaluru SHRI ANAND NANDANWAR

MS SUJATHA D. (Alternate)

Mutha Industries, Agartala SHRI NEERAJ MUTHA

SHRI ANIL MUTHA (Alternate)

National Test House, Kolkata DR SOMIT NEOGI

SHRI S. PANERIA (Alternate)

The South Indian Plywood Manufacturers Association, SHRI MOIZ VAGH

Chennai

The Western India Plywood Limited, Kannur SHRI P. K. MAYAN MOHAMED

DR E. SREENIVASAN (Alternate)

Timpack Private Limited, Byrnihat SHRI INDER PAL SINGH BHUSRI

SHRI ANGAD SINGH BHUSRI (Alternate)

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IS 710 : 2024

Organization Representative(s)

Wood Technology Association, Yamuna Nagar SHRI S. C. JOLLY

BIS Directorate General SHRI ARUNKUMAR S., SCIENTIST ‘E’/DIRECTOR AND

HEAD (CIVIL ENGINEERING) [REPRESENTING
DIRECTOR GENERAL (EX-officio)]

Member Secretary
SHRI PRADEEP SINGH SHEKHAWAT
SCIENTIST ‘D’/JOINT DIRECTOR
(CIVIL ENGINEERING), BIS

Plywood, Veneers and Adhesives for Wood Products Subcommittee, CED 20 : 1

Organization Representative(s)

Institute of Wood Science and Technology, MS SUJATHA D. (Convener)

Bengaluru

Allied Resins and Chemicals Limited, Kolkata SHRI RAJESH MUNDRA

SHRI ASHIM KUMAR DAS (Alternate)

Central Public Works Department, New Delhi CHIEF ENGINEER (CSQ)

SUPERINTENDENT ENGINEER (TAS) (Alternate)

Defence R & D Organization, Kanpur DR D. N. TRIPATHY

Directorate of Standardisation, Ministry of SHRI V. K. CHHABRA

Defence, DTE of Standardization Government, SHRI S. K. SAXENA (Alternate)
New Delhi

Federation of Indian Plywood and Panel Industry, SHRI C. N. PANDEY

New Delhi SHRI JAYDEEP CHITLANGIA (Alternate)

Forest Research Institute (FRI), Dehradun DIRECTOR

Greenply Industries Limited, Kolkata SHRI ARABINDA SAHA

Hunsur Plywood Works Private Limited, Hunsur SHRI MOIZ VAGH

Institute of Wood Science and Technology, DR NARSIMHAMURTHY

Bengaluru

Kanara Wood & Plywoods Industries Limited, SHRI P. H. G. REDDY

Mangaluru SHRI Y. MOHAMMED FARHAAD (Alternate)

National Test House, Kolkata SHRI SOMIT NEOGI

SHRI S. PANERIA (Alternate)

Nuchem Limited, New Delhi SHRI SUDEV BARAR

SHRI ARUSH BARAR (Alternate)

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IS 710 : 2024

Organization Representative(s)

Sarda Plywood Industries Limited, Kolkata SHRI SUNDEEP CHITLANGIA

SHRI S. L. YADAV (Alternate)

The South Indian Plywood Manufacturers SHRI MOIZ VAGH

Association, Mysuru

The Western India Plywood Limited, Kannur SHRI P. K. MAYAN MOHAMED

DR E. SREENIVASAN (Alternate)

In Personal Capacity (S-9, Sangath Alarcity Flats, DR R. N. KUMAR

M.G.R. Nagar, Second Main Road, Velachery,
Chennai)

In Personal Capacity (House No. 12, HIG, 1st Stage, SHRI S. S. ZOOLAGUD
K.H.B. Colony, Basaveswara Nagar,
Bangaluru)

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Amend No. Date of Issue Text Affected

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