MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG, NEW DELHI 110002

व्यापक परिचालन मसौदा

हमारा संदर्भः सीईडी 09/टी – 11 30 ददसंबर 2022

तकनीकी सदमदत: टिम्बर और टिम्बर स्टोर्स टिषय र्टिटि, र्ीईडी 09

प्राप्तकताभ :

क) टर्टिल इं जीटियरी टिभाग पररषद् , र्ीईडीर्ी के र्भी र्दस्य

ख) टिम्बर और टिम्बर स्टोर्स टिषय र्टिटि , र्ीईडी 9, उप-र्टिटियां र्ीईडी 9:1 और र्ीईडी 9: 13 के र्भी र्दस्य
ग) रूटि रखिे िाले अन्य टिकाय

िहोदय/िहोदया,

टिम्िटलखखि भारिीय िािक का िर्ौदा र्ंलग्ि हैं :

प्रलेख संख्या र्शीषक

सीईडी 09 (21631)WC प्लाईवु ड के दलए लॉग्स - दवदर्शदि
का र्ारतीय मानक मसौदा
(IS 656 का िौथा पुिरीक्षण)
ICS 79.040

कृपया इर् िािक के िर्ौदे का अिलोकि करें और अपिी र्म्िटियॉ यह बिािे हुए भे जे टक यटद यह िािक के
रूप िें प्रकाटिि हो िो इर् पर अिल करिे िें आपके व्यिर्ाय अथिा कारोबार िें क्या कटििाइयााँ आ र्किी हैं ।

र्म्िटियॉं भे जिे की अंटिि टिटथ : 29 जनवरी 2023

र्म्िटि यटद कोई हो िो कृपया अधोहस्िाक्षरी को उपररटलखखि पिे पर र्ंलग्ि फोिे ि िें भे जें या ced9@bis.gov.in
पर ईिे ल कर दें ।

यटद कोई र्म्मटि प्राप्त िही होिी है अथिा र्म्मटि िें केिल भाषा र्म्बन्धी त्रु टि हुई िो उपरोक्त प्रलेख को यथािि
अंटिि रूप टदया जाएगा। यटद र्खम्मि िकिीकी प्रकृटि की हुई टिषय र्टिटि के अध्यक्ष के पराििस र्े अथिा उिकी इच्छा
पर आगे की कायसिाही के टलए टिषय र्टिटि को भे जे जािे के बाद प्रले ख को अंटिि रूप दे टदया जाएगा ।
यह प्रले ख भारिीय िािक ब्यूरो की िैबर्ाइि www.bis.gov.in पर भी उपलब्ध हैं ।

धन्यिाद ।
भिदीय,

(अरुण कुमार एस.)

िैज्ञाटिक ‘ई’ एिं टिदे िक
(प्रिु ख, टर्टिल इं जीटियररं ग टिभाग)
र्ंग्लि : उपररटलखखि
 MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG, NEW DELHI 110002

DRAFT IN WIDE CIRCULATION

Ref: CED 09/T- 11 30 December 2022

TECHNICAL COMMITTEE: Timber and Timber Stores Sectional Committee, CED 09

ADDRESSED TO:

a) All Members of Civil Engineering Division Council, CEDC

b) All Members of Timber and Timber Stores Sectional Committee CED 09, Sub-Committees
CED 9:1 and CED 9:13
c) All others interests.

Dear Sir/Madam,

Please find enclosed the following document:

Doc No. Title

CED 09 (21631)WC Draft Indian Standard
Logs for Plywood - Specification
(Fourth Revision of IS 656)
ICS 79.040

Kindly examine the draft standard and forward your views stating any difficulties which you are
likely to experience in your business or profession, if this is finally adopted as National Standard.

Last date for comments: 29 January 2023

Comments if any, may please be made in the attached format and mailed to the undersigned at
the above address or preferably through e-mail to ced9@bis.gov.in.

In case no comments are received or comments received are of editorial nature, you may kindly
permit us to presume your approval for the above document as finalized. However, in case of comments
of technical in nature are received then it may be finalized either in consultation with the Chairman,
Sectional Committee or referred to the Sectional Committee for further necessary action if so desired by
the Chairman, Sectional Committee.

The document is also hosted on BIS website www.bis.gov.in.

Thanking you,
Yours faithfully,

(Arunkumar S.)
Scientist ‘E’ & Director
Encl: as above (Head Civil Engineering Department)
 FORMAT FOR SENDING COMMENTS ON BIS DOCUMENTS

(Please use A-4 size sheet of paper only and type within fields indicated. Comments on each
clause/sub-clause/table/fig etc. be started on a fresh box. Information in column 3 should include
reasons for the comments and suggestions for modified working of the clauses when the existing
text is found not acceptable. Adherence to this format facilitates Secretariat’s work) {Please e-
mail your comments to ced9@bis.gov.in.

Doc. No.: CED 09 (21631) WC

TITLE: Draft Indian Standard on Logs for Plywood - Specification

(Fourth Revision of IS 656) ICS 79.040

LAST DATE FOR COMMENT: 29 January 2023

NAME OF THE COMMENTATOR/ORGANIZATION: _________________________

Sl. Clause/Sub- Comments/Suggestions Modified Wordings Reasons/
No. clause/Para
No. Justifications for the
Proposed Changes

(1) (2) (3) (4) (5)

Draft Standard for comments only CED 9 (21631)WC
December 2022

BUREAU OF INDIAN STANDARDS

DRAFT FOR COMMENTS ONLY

(Not to be reproduced without the permission of BIS or used as an Indian Standard)

Draft Indian Standard

LOGS FOR PLYWOOD - SPECIFICATION

(Fourth Revision of IS 656)

ICS 79.040
___________________________________________________________________________
Timber and Timber Stores Last date for comments
Sectional Committee, CED 09 29 January 2023

FOREWORD

(Formal clauses will be added later)

The supply of logs is of great economic and technical importance for plywood trade, it was
realized that the logs for plywood as offered to the plywood factories varied considerable in
quality. Normally, logs are required to be supplied to the factories fresh after felling, and the time
allowed between their felling and supply to the factories is three months. When trees are felled
by axe, it is customary to square cut the ends before supplying. However, if the ends are not
square cut, it is permissible for the purchaser to eliminate the uneven ends in the measurements
of the log. With a view to providing the factories a guide for the selection of logs for the
manufacture of plywood conforming to the relevant Indian Standards, this standard was
published in 1955 and further revised in 1964, 1975 and 1988.

In this revision, following modifications have been incorporated;

1) Scope has been modified as applicability of the standard has increased including with
respect to newer standards on plywood,
2) Sampling and criteria for conformity have been included,
3) BIS certification marking clause has been updated,
4) Cross-referred standards have been made up-to-date, and
5) Additional requirement of Eco-mark has been added.

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

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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 logo.
Requirements to be satisfied for a product to qualify for the BIS Standard Mark for
ecofriendliness, 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.

The standard contributes to the Sustainable Development Goal 9 – Industry, innovation and
infrastructure: Build resilient infrastructure, promote inclusive and sustainable industrialization
and foster innovation.

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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Draft Indian Standard

LOGS FOR PLYWOOD - SPECIFICATION

(Fourth Revision)

1 SCOPE

This standard specifies the minimum requirements for logs for making veneers for the
manufacture of various grades of plywood, namely, tea-chest [IS 10 (Part 2)], general purposes
(IS 303), medium strength aircraft (IS 709), high strength aircrafts (IS 4859), marine (1S 710),
veneered decorative (IS 1328), decorative (IS 7316), concrete shuttering works (IS 4990), fire
retardant (IS 5509), structural (IS 10701), museum (IS 15791) and veneered particle boards (IS
3097), block boards (IS 1659), and flush doors [IS 2191 (Part 1) and IS 2202 (Part 1)] conforming
to the relevant standards.

2 REFERENCES

The standards listed in Annex A contain provisions which through reference in this text,
constitute provision of this standard. At the time of publication, the editions indicated were valid.
All standards are subject to revision, and parties to agreements based on this standard are
encouraged to investigate the possibility of applying the most recent editions of the standards
indicated in Annex A.

3 TERMINOLOGY

3.1 For the purpose of this standard, the definitions and terms given in IS 707 shall apply.

4 SPECIES OF TIMBER

4.1 Logs for the manufacture of veneers for plywood, etc, shall be from any of the species of
timber agreed upon between the supplier and the purchaser from among the specified in the
corresponding standards.

For ECO Mark only species of wood from sources other than natural forests such as social
forestry plantations etc shall be used.

5 DIMENSIONS OF LOGS

5.1 Length

The length of ply-logs shall be not less than 1.50 m.

5.2 Girth

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Unless otherwise agreed between the supplier and the purchaser, the girth (see 5.3.2) of a log
measured under the bark shall be not less than 1.20 m.

5.3 Measurement

The length and the girth of the log shall be measured as specified in 5.3.1 and 5.3.2. The length
and the girth of the log shall be measured in metres. The length shall be rounded off to the
nearest lower 0.01 m.

5.3.1 Length

When the ends are snouted, the length of the logs shall be measured from the first felling cut,
that is, the cut extending farthest into the length from the butt end, to the nearest cut at the top
end (see Fig. 1).

5.3.1.1 Where there is a napha or chain groove on one end, the length of the log shall be
measured between the other end to the middle of the outer edge of napha or chain groove and
the first felling cut of the snouted end near it (see Fig. 1).

FIG. 1 MEASUREMENT OF LENGTH OF LOGS

5.3.2 Girth

5.3.2.1 The mean girth of a log, in the case of logs of regular taper, shall be measured at mid-
length of the log.

5.3.2.2 In a log with an irregular taper, these girth measurements shall be taken, that is, one
near the mid-girth at a place free from any protuberances, and one at each end, the mean girth
being obtained by taking the average of these three measurements.

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5.3.2.3 In measuring girth, measurements shall be taken without the bark on and excluding any
protuberances. Where girth measurements are taken with bark, 10 percent reduction of mean
girth shall be made from mid girth on account of bark.

5.3.3 Volume

The volume of the log shall be calculated by the following formula:

𝐺 2
𝑉 = (4) × 𝐿

where

𝑉= volume in m3
𝐺= girth in m, and
𝐿= length in m.

6 QUALITY REQUIREMENT

6.1 The logs shall not be knobby. They shall be free from buttresses, crotches, brash wood any
kind of decay (rot) including dote, insect attack and any other defect (except those permitted
under 6.2) which may reduce the usefulness of logs for plywood or veneer production. The
plugging of defects shall not be permissible.

6.2 Permissible Defects

6.2.1 Curvature

A deviation in straightness up to 30 mm in 1 m length, as measured from a line passing through

the ends, shall be permissible.

6.2.2 Taper

A taper up to 25 mm in girth for every 1 m of girth for 1 m length of log shall be permissible.

6.2.3 Hollow or Spongy Heart

When hollow or spongy hearts are present, they shall be permissible up to a diameter of 50 mm.

6.2.4 End Splits and Heart Shakes

The longest end splits and heart shakes on both sides added together shall be permissible up
to a total length of 40 mm for every 1 m of the log.

6.2.5 Cup Shakes

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Cup shakes visible on one or both ends and located within 50 mm from the centre heart (pith) of
the log shall be permissible.

6.2.6 Knots

6.2.6.1 Live knots

Live knots measuring up to 50 mm in diameter and occurring not more than one in number in a
length of 1 m shall be permissible.

6.2.7 Wounds, Bird Pecks or Bark Pockets

Wounds, bird pecks or bark pockets not exceeding 10 mm in diameter and 25 mm in depth shall
be permissible up to one in number per metre length of the log.

6.2.8 Flutes

As agreed upon between the purchaser and the supplier, where flutes occur, appropriate
reduction in girth shall be made.

6.2.9 Notwithstanding the permissible defects referred to under 6.2.6 and 6.2.7 (knots, wounds,
bird pecks or bark pockets), the total number of defects shall not collectively exceed 4 per 3 m
length of the log.

7 PROTECTION OF PLYWOOD

7.1 Timber species shall be given prophylactic treatment in accordance with Table 2 Group 9 of
IS 401. The treatment shall be given immediately after felling.

7.2 Besides the prophylactic treatment of logs in accordance with 7.1, the end coating shall also
be given in accordance with IS 1141 to prevent end splitting and other drying defects.

8 SAMPLING AND CRITERIA FOR CONFORMITY

8.1 Lot

In any consignment, all the logs for plywood manufactured and treated under similar conditions
of production shall be grouped together to constitute a lot.

8.2 Sampling procedure shall be a subject of agreement between the bulk buyers and the
supplier. The sample selected shall conform to the requirements given in this standard.

9 ADDITIONAL REQUIREMENTS FOR ECO-MARK

9.1 General Requirement

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9.1.1 Logs shall conform to the requirement specified in this standard.

9.1.2 The manufacturer shall produce to BIS, the environmental consent clearance from State
Pollution Control Board as per the provisions of the Water (Prevention and Control of Pollution)
Act, 1974 and Air (Prevention and Control of Pollution) Act, 1981, Water (Prevention and Control
of Pollution) Act, 1981 and Water (Prevention and Control or Pollution) Cess Act, 1977 along
with the authorization, if required under the Environment (Protection) Act, 1986, while applying
for ECO-Mark appropriate with enforced rules and regulations of Forest Department.

9.2 Specific Requirement

Logs shall conform to the specific requirements given for ECO-Mark under relevant clauses of
this standard.

NOTE — The manufacturer shall provide documentary evidence by way of certificate or declaration to
Bureau of Indian Standards, while applying for ECO-mark.

10 MARKING

10.1 Each log shall be legibly and indelibly marked on both the ends with the following:

a) Supplier’s identification mark by abbreviated initials,

b) Length and mid girth of log,
c) Species of timber (see 4.1),
d) Batch no./ Lot no, and
e) Criteria for which the log has been labelled as ECO-Mark.

10.2 BIS Certification Marking

The product(s) may be marked with Standard Mark as per the conformity assessment schemes
governed by the provisions of the Bureau of Indian Standards Act, 2016 and the Rules and
Regulations made there under. The details of conditions for the Licence may be obtained from
the Bureau of Indian Standards.

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ANNEX A
(Clause 2)
LIST OF INDIAN REFFERED STANDARDS

IS No. Title

10 (Part 2) : 2013 Plywood tea-chests — specification part 2 plywood

(sixth revision)
303: 1989 Plywood for general purposes- Specification
(third revision)
401: 2001 Preservation of timber - Code of practice
(fourth revision)
707: 2011 Timber technology and utilization of wood, bamboo and cane
— Glossary of terms (third revision)
709: 1974 Specification for medium strength aircraft plywood
(first revision)
710: 2010 Marine plywood - Specification (second revision)

1141: 1993 Seasoning of timber - Code of practice (second revision)

1328: 1996 Veneered Decorative Plywood –Specification

(third revision)

1659: 2004 Block boards - Specification

(fourth revision)

2191 (Part 1 ): 2022 Specification for wooden flush door shutters

(cellular and hollow core type) : Part 1 Plywood face panels
(fifth revision)

2202 (Part 1) : 2022 Wooden Flush Door Shutters (Solid Core Type) —
Specification Part 1 Plywood Face Panels
(seventh revision)

3097: 2006 Veneered Particle Boards –Specification

(second revision)
4859: 1968 Specification for high strength aircraft plywood
With Amendment
4990: 2011 Plywood for concrete shuttering works - Specification
(third revision)

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5509: 2021 Fire Retardant Plywood - Specification

(third revision)
7316: 1974 Specification for decorative plywood using plurality of
veneers for decorative faces
10701: 2012 Structural Plywood – Specification (first revision)

15791: 2007 Museum Plywood – Specification