Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 1659 (2004): Block Boards -Specification [CED 20: Woodand other Lignocellulosic products]

IS 1659:2004

Indian Standard

BLOCK BOARDS — SPECIFICATION

(Fourth Revision)

ICS 79.060.01

0 BIS 2004

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

August 2004 Price Group 8

Wood and Other Lignocellulosic Products Sectional Committee, CED 20

FOREWORD

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

Block boards are being used in increasing quantities in the construction of railway carriages, bus bodies, marineand river crafts and for l%miture making, partitions, panelling, prefabricated houses, etc. This standard wasoriginally formulated in 1960 and subsequently revised in 1969, 1979 andl 990 to lay down the method ofmanufacture, tests for such boards and review of species of timber with a view to assuring the optimum performancerequirements for different uses. The fourth revision is based on the experience gained in the manufacture and useof block boards over the years and the modifications mainly relate to incorporation of amendments in earlierversion, specifying mycological! test for MR Grade Boards only and adding spot test for checking preservativetreatment; provision of modulus of rupture and modulus of elasticity requirements and its test method; includinggiving dimensions and tolerances in this specification.

In the formulation of this standard, due weightage has been given to international co-ordination among standardsand practices prevailing in different countries in addition to relating it to the practices in the field in this country.

A scheme of Iabelling environwnt friendly products to be known as ECO-Mark has been introduced at theinstance of the Ministry of Enviro~ent and Forests (MEF), Government of India. The ECO-Mark shall beadministered by the Bureau of Indian Standards (BIS) under the BLSAct, 1986 as per the Resolution No. 71 dated21 February 1991 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 of the BIS besides meeting additional optional environment friendlyrequirements.

The composition of the technical committee responsible for the formulation of this standard is given at Annex M.

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 withIS 2: 1960 ‘Rules for rounding off numerical values (revise~’. The number of significant places retained in therounded off value should be the same as that of the specified value in this standard.

AMENDMENT NO. 1 NOVEMBER 2009

TO

IS 1659 : 2004 BLOCK BOARDS ― SPECIFICATION

( Fourth Revision )

(Page 2, clause 7.3) ― Add the following at the end:

‘NOTE – Edge straightness and squareness shall be tested as per Annex D.’

(Page 2, clause 8.1.5, last line) ― Substitute ‘Annex E’ for ‘Annex D’.

(Page 3, clause 8.2.3, fourth line) ― Substitute ‘Annex E’ for ‘Annex D’.

(Page 3, clause 9.2.1, first line) ― Substitute ‘Annex F’ for ‘Annex E’.

(Page 3, clause 9.2.2.1) ― Substitute the following for the existing:

‘9.2.2.1 Test specimens for BWP grade block boards, after soaking in boiling water for 72 h and tested as

in Annex G shall comply with the requirements of 9.2.3. Alternatively, the specimens shall be subjected to

constant steam pressure inside a vacuum steam pressure test apparatus as described in G-1.1.2 and shall

thereafter comply with the requirements of 9.2.3.

(Page 3, clause 9.2.2.2, third line) ― Substitute ‘Annex G’ for ‘Annex F’.

(Page 3, clause 9.2.3, first line) ― Substitute ‘Annex H’ for ‘Annex G’.

(Page 3, clause 9.2.4, second line) ― Substitute ‘Annex J’ for ‘Annex H’.

(Page 3, clause 9.2.5, second line) ― Substitute ‘Annex K’ for ‘Annex J’.

(Page 3, clause 9.2.6, second line) ― Substitute ‘Annex L’ for ‘Annex K’.

(Page 8, Annex C) ― Insert the following Annex at the end and rename the subsequent Annexes

accordingly:

‘ANNEX D

(Clause 7.3)

METHOD OF TEST FOR EDGE STRAIGHTNESS AND

SQUARENESS

D-1 PROCEDURE FOR EDGE STRAIGHTNESS

D-1.1 The straightness of the edges and ends of plywood shall be verified against a straight edge not less

than the full length of the plywood. If the edge on the end of the plywood is convex, it shall be held against

the straight edge in such a way as to give approximately equal gap at each end. The largest gap between the

straight edge and the edge shall be measured to the nearest millimetre and recorded.

1

Amend No. 1 to IS 1659 : 2004

D-2 PROCEDURE FOR SQUARENESS

D-2.1 The squareness of plywood shall be checked with a square with arms 500 mm long, by applying one arm

of the square to the plywood. The maximum width of the gap shall be recorded.’

(Page 9, renamed Annex G, clause G-1.1) ― Add the following at the end:

‘G-1.1.2 Alternate Method of Test

Pure water shall be filled in boiler of a vacuum steam pressure test (VPT) apparatus to the marking of

minimum water level on glass water level indicator and the boiler shall be switched on with the valve

connecting the boiler and main chamber in closed condition. The test specimens shall be placed in the

working (main) chamber and shall be closed air-tight with cover. The vacuum pump shall then be switched

on and vacuum inlet valve shall be kept in open condition. The steam release valve shall be kept in closed

condition. After the required vacuum of 110 ± 10 kPa has been created inside the main chamber, the

vacuum pump shall be switched off, the vacuum inlet valve closed and boiler valve connected to main

chamber opened. The time shall be noted the moment the steam pressure in the main chamber reaches 220

± 10 kPa and same pressure shall be maintained for six hours. The system and boiler then shall be switched

off. The steam release valve and vacuum release valve shall slowly be opened until the steam in the

chamber is completely evacuated. The samples shall then be kept in water for 1 hour at 27±2°C. The

samples shall thereafter be tested as per 9.2.3.’

(Page 14, renamed Annex K, clause K-2) ― Substitute ‘b = breadth of the test specimen, in mm;’ for

‘B = breadth of the test specimen, in mm;’

(CED 20)

Reprography Unit, BIS, New Delhi, India

2

AMENDMENT NO. 2 NOVEMBER 2011TO

IS 1659 : 2004 BLOCK BOARDS ─ SPECIFICATION

( Fourth Revision )

[Page 3, clause 9.2.6 (see also Amendment No. 1)] — Substitute thefollowing for the existing:

‘When preservative treated in accordance with 6.1, the block board shall betested according to the method given in Annex L. The preservative treatment atany given place after cutting across entire cross-sectional area for the width ofthe block board shall show through and through penetration of preservativechemical.’

(CED 20)

Reprography Unit, BIS, New Delhi, India

1S 1659:2004

Indian Standard

BLOCK BOARDS — SPECIFICATION

(Fourth Revision )

1 SCOPE

This standard covers the essential requirements ofcommercial and decorative block boards meant bothfor interior and exterior uses.

2 REFERENCES

The standards listed in Annex A contain provisionswhich through reference in this text, constituteprovisions of this standard. At the time of publication,the editions indicated were valid. All standards aresubject to revision and parties to agreements based onthis standard are encouraged to investigate thepossibility of applying the most recent editions of thestandards indicated.

3 TERMINOLOGY

3.0 For the purpose of this standard, the definitionsgiven in IS 707 and the following shall apply.

3.1 Block Boards

Block board is a board having a core made up ofstrips of wood, not exceeding 30 mm in width, whichmay or may not be glued together and the core is gluedto two or more veneers, on either side with graindirect ion of core and veneers running at right angles toone another.

4 GRADES AND TYPES

4.1 Block boards shall be of the following two grades:

a) BWP Grude — Such block board may be usedfor bus bodies, railway coaches, prefabricatedhouses, etc, where it is likely to be exposed tohigh humidity and for external use.

b) MR Grade— Such block board maybe used forinterior use such as furniture, partition, panelling,ceiling, etc.

4.2 Each of the grades specified in 4.1 shall be of thefollowing two types:

a) Decorative Type — These are block boards withdecorative face veneers on one or both sides foruse in high class furniture, panelling, interiordecoration, partitions, etc.

b) Commercial Type — These are block boards withveneers of commercial timber on both sides andare used for ordinary furniture, table tops,partitions and panelling to be painted overflooring and seats of bus bodies, railwaycarriages, etc.

4.3 The grades and types of block boards shall berepresented by the symbols given below:

Grade and Type Symbol

BWP Grade, Decorative type BWP-DEC

BWP Grade, Commercial type BWP-COM

MR Grade, Decorative type MR-DEC

MR Grade, Commercial type MR-COM

5 MATERIALS

5.1 Timber

5.1.1 Any suitable species of timber may be used forblock board manufacture. A list of species formanufacture of block board is given in Annex B forguidance only.

For ECO-Mark only species of wood from sources otherthan natural forests such a~wood from rubber, cashewindustrial and social forestry plantations, etc, and shadetrees from tea and coffee estates, shall be used for themanufacture of block board.

5.1.2 Face Veneers for Decorative Type of BlockBoards/

The species of timber for the decorative face veneer indecorative type of block board shall be specified bythe purchaser while placing the order. The species oftimber commonly used for face veneers of decorativetype of block boards is given in Annex C for guidanceonly.

For ECO-Mark only species of wood from sources otherthan natural forests such as wood from rubber, cashewindustrial and social forestry plantations, etc, and shadetrees from tea and coffee estates shall be used.

5.2 Adhesives

The adhesives used for bonding purposes shall be theBWP type conforming to IS 848 for BWP Grade blockboards. For MR Grade block boards, the adhesivesshall be MR type conforming to IS 848.

6 MANUFACTURE

6.1 Preservative Treatment

Species of timber marked with (*) in Annex B andAnnex C and sapwood of all species, and all non-durablespecies shall be treated as mentioned in 1S 401.Trimmed and cut ends of a finished block board maybe given a protective treatment.

1S 1659:2004

6.2 Core

The wooden strips for core shall be cut fromtimber seasoned to a moisture content not exceeding12 percent according to IS 1141. The width of eachstrip of wood shall not exceed 30 mm and such stripshall be placed edge to edge without significant gaps.These strips may be of small lengths placed end to endwhere the end joints shall be staggered. However, forthe edge strip along the length, the width of strip maybe up to 45 mm.

6.3 Cross Bands and Faces

Veneers used for cross bands and faces shall beeither rotary cut or sliced and shall be smooth. Themoisture content in the veneers shall be between 8and 12 percent.

6.3.1 Cross band shall be not less than 1.0 mmbut not more than 3.0 mm in thickness. Faceveneers shall be between 0.5 to 1.5 mm in thicknessf-or commercial type of block boards and 0.5 to1.2 mm in thickness for decorative type of blockboards.

6.3.2 The construction shall be well balanced aroundthe central line.

6.3.3 Permissible defects and tolerances on thicknessshall conform to IS 303 and IS 1328 for commercialand decorative veneers, respectively.

7 DIMENSIONS AND TOLERANCES

7.1 Thickness

The thickness of block boards shall be 12, 15, 19,25,30, 35, 40, 45 or 50 mm.

7.2 Sizes

Block boards shall be of sizes as specified below:

Length Widthmm mm

2440 1220

2140 1220

2140 920

1830 1220

1830 920

NOTE — Any other dimensions(length,breadthandthickness)as agreed to between the manufacturer and the purchaser mayalso be used,

7.3 Tolerance

Tolerances on nominal size of finished boards shall beas given below:

Dimension To[erance

Length -i-6

–Omm

Width +3_Omm

Thickness &5 percent

Variation in thickness Not more than 0.5 mmon a board

Edge straightness 2 mm per 1000 mmor 0.2 percent

Squareness 2 mm per 1000 mmor 0.2 percent

8 SAMPLING AND INSPECTION

8.1.1 Lot

In any consignment, all block boards of the same grade,type and thickness and manufactured under similarconditions shall be grouped together to constitute a lot.

8.1.1.1 The conformity of a lot to the requirements ofthis standard shall be ascertained on the basis of testson block boards selected from it.

8.1.2 The method of drawing representative samplesand the criteria for conformity shall be as prescribed in1S 7638.

8.1.3 Defects

All block boards selected as in 8.1.2 shall be inspectedvisually for surface defects (see 6.3.3) and if one ormore block boards are found unsatisfactory, the lot shallbe declared as unacceptable.

8.1.4 Length and Width

All block boards selected as in 8.1.2 shall have lengthand width within the tolerances specified under 7.3.

8.1.5 Thickness

All block boards selected as in 8.1.2 shall have its meanthickness and variation in thickness between any twopoints on a block board as specified under 7.3 whentested by the method described in Annex D.

8.2 Test Specimens and Number of Tests

8.2.1 The selected block boards as in 8.1.2 shall betaken up for cutting of test specimens for further testing.

8.2.2 From each of the block boards selected, followingtest specimens shall be cut from the portion 150 mmaway from the edges:

a) Six test specimens of size 200 mtn X 12 mm forthe test mentioned in 9.2.1;

b) Three test specimens of size 200 mm x 100 mmfor the test mentioned in 9.2.2;

2

c) Three test specimens of size 200 mm x 100 mmfor the test mentioned in 9.2.3;

d) Three test specimens of size 150 mm x 100 mmfor the test mentioned in 9.2.4;

e) Three test specimens of size (50 mm + 20 d)length and 75 mm width in full thickness ofboard for the test mentioned in 9.2.5, where d isthe nominal thickness in mm. Greaterdimensions shall be in the direction along theface grain; and

f) One test specimen of entire cross-sectional areaacross its full width for the test mentioned in9.2.6.

8.2.3 The test specimens so obtained shall beconditioned in accordance with 9.1 and the thicknessof each test specimen shall be measured by themethod given in Annex D and the mean of all suchmeasurements calculated. The test specimens shallthen be tested for the corresponding tests.

8.3 Criteria for Conformity

A lot shall be considered as conforming to therequirements of this standard, if the requirementsmentioned in 9.2.1 to 9.2.6 are all satisfied.

9 TESTS

9. I Preparation and Conditioning of Test Pieces

The required test specimens shall be cut to the specifiedsize as given in 8.2.2. Each test specimen shall berectangular with all edges cut square to the surface.Before any tests are made, the prepared test pieces shallbe suitably conditioned.

NOrE — Exposure for 24 h to the air of a well-ventilatedroom will often suffice but when a greater degree of accuracyis required, the test piece shall be exposed to an atmospheremaintained at a temperature of 27 + 2°C and at a relativehumidity of 65 + 5 percent until they are substantially constantin mass.

9.2 The block boards shall be subjected to the followingtests and shall satisfy the requirements specified undereach test.

9.2.1 Dimensional Changes Caused by Humidip

When tested according to Annex E, the dimensions shallnot change by more than +1 mm at relative humiditiesof 90 percent and 40 percent compared to thedimensions of the specimens conditioned at 65 percentrelative humidity. There shall be no delamination atthe extreme ranges of humidity and the changes in localplaneness measured as d/L shall be as follows:

~L < 1/150

where

d = vertical gap between any two points, and

L = horizontal distance between these points.

IS 1659:2004

9.2.2 Resistance to Water

When tested according to the methods specifiedin 9.2.2.1 and 9.2.2.2, the block boards shall satisfythe requirements given therein.

9.2.2.1 Test specimens from BWP Grade block boards,after soaking in boiling water for 72 h and tested as inAnnex F shall comply with the requirementsof9.2.3.

9.2.2.2 Test specimens from MR Grade block boards,after soaking of test pieces for 3 h in water at atemperature of 60 + 2°C and tested as in Annex F shallcomply with the requirements of 9.2.3.

9.2.3 Adhesion of Plies

The adhesion of plies shall be tested as in Annex G andthe fractured surface of the specimen shall showadherent fibres of a ‘pass standard’.

9.2.4 Mycological T&t

MR Grade block board specimens, when testedaccording to Annex H shall show no visible signs ofseparation at the edges.

9.2.5 Modulus of Rupture and Modulus of Elas~icity

The modulus of rupture and modulus of elasticity whentested according to the method given in Annex J, BWPGrade and MR Grade boards shall have average andminimum individual values as given below:

Modulus of rupture, N/mm2:

Average

Minimum, individual

Modulus of elasticity, N/mm*:

Average

Minimum individual

9.2.6 Spot Test

B WP MRGrade Grade

50 40

42 34

5000 4000

4200 3400

The preservative treatment when tested according tothe method given in Annex K, at any given place aftercutting across entire cross-sectional area for the widthof block board shall show through and throughpenetration of preservative chemical.

10 ADDITIONAL REQUIREMENTS FORECO-MARK

10.1 General Requirements

10.1.1 The block board shall conform to therequirements of quality and performance as specifiedin this standard.

10.1.2 The manufacturers shall produce to BISenvironmental consent clearance from the concerned

3

1S 1659:2004

State Pollution Control Board as per the provisionsof the Water (Prevention and Control of Pollution)Act, 1974 and Air (Prevention and Control ofPollution) Act, 1981 and Water (Prevention andControl of Pollution) Act, 1977 along with theauthorization, if required under the Environment(Protection) Act, 1986 while applying for ECO-Mark,appropriate with enforced rules and regulations ofForest Department.

10.2 Specific Requirements

The block board shall conform to the specificrequirements given for ECO-Mark under relevantclause of the standard.

NOTE — The manufacturers shall provide documentaryevidence by way of certificate or declaration to Bureau ofIndian Standards while applying for ECO-Mark.

11 MARKING

Each block board shall be legibly and indelibly marked

on any of its face with the following:

a) Indication of the source of manufacture;

b) Grade and type of block board;

c)

d)

e)

Size (length, width and thickness);

Batch number and year of manufacture; and

The criteria for which the block boards havebeen Iabelled as ECO-Mark.

11.1 BIS Certification Marking

The product may also be marked with the StandardMark .

11.1.1 The use of the Standard Mark is governed bythe provisions of Bureau ofIndian Standards Act, 1986and the rules and regulations made thereunder. Thedetails of conditions under which the licence for theuse of Standard Mark maybe granted to manufacturersor producers maybe obtained from the Bureau of IndianStandards.

ANNEX A

(Clause 2)

LIST OF REFERRED INDIAN STANDARDS

1S No. Title

303:1989 Specification for plywood for generalpurposes (third revision)

401:2001 Preservation of timber — Code ofpractice ~ourth revision)

707:1976 Glossary of terms applicable for timbertechnology and utilization (secondrevision)

848:1974 Specification for synthetic resin

IS No.

1141:1993

1328:1996

7638:1999

Title

adhesives for plywood (phenolic andaminoplastic) (jirst revision)

Code of practice for seasoning of timber(second revision)

Specification for veneered decorativeplywood (third revision)

Wood/Lignocellulosic based panelproducts—Methods of sampling(second revision)

4

IS 1659:2004

ANNEX B

(Clauses 5.1.~ and 6.1)

TIMBER FOR BLOCK BOARD (OTHER THAN FACE VENEERS OFDECORATIVE TYPE BLOCK BOARDS)

Standard Trade Name Botanical Name Abbreviation

Aini

*Alder

Amari

Arjun

*Bahera

Benteak

Birch

Bonsum

*Cashew

*Carallia

(Maniawga)

Champ

Chaplash

Chikrassy

*Chilauni

*Chir

Cinnamon

Deodar

Devdam

*Dillenia

Dipika (Lapse)

Debdaru (Nedunar)

Ebony

Eucalyptus

Fir

Gamari

Gandelipoma

‘Gokul

Gurjan

Haldu

Hathipaila

Hollock

Hollong

*Jaman

*Jhingan

*Kadam

Artocarpus hirsuitus

Alnus spp.

Amoora spp.

Terminalia arjuna

Terminalia bellerica

Lagerstroemia Ianceolata

Betula, spp.

Phoebe spp.

Anacardium occidental

Carallia brachiata

(Syn. integerrima)

Michelia spp.

Artocarpus chaplasha

Chukrasia velutina (Syn. C. tabularis)

Schima wallichii

Pinus roxburghii (Syn. P. Iongijolia)

Cinnamomum spp,

Cedrus deodara

Dysoxylum binectarijerum

Dillenia spp.

h4ansonia dipikae

Po@althia spp.

Diospyros spp.

(other than D. Diospyros marmorata)

Eucalyptus spp.

Abies spp.

Gmelina arborea

Dyso@um hamiltonii

Ailanthus integrfolia (Syn. A. grandis)

Dipterocarpus spp.

(other than D. macrocarpus)

Adina cordijolia

Pterospermum acerl~olium

Terminalia myriocarpa

Dipterocarpus macrocarpus

Syzygium spp.

Lannea coromandelica (Syn. Lannea grandis)

Anthocephalus cadamba

5

AIN

ALD

AMA

ARJ

BAH

BEN

BIR

BON

CAS

CAR

CHM

CHP

CHI

CHL

CHR

CIN

DEO

DEV

DIL

DIP

DEB

EBO

EUC

FIR

GAM

GEN

GOK

GUR

HAL

HAT

HOL

HON

JAM

JHI

KAD

IS 1659:2004

Starrdcud Trude Name Botanical Name Abbreviation

*Kail

Kanju

*Karani

Kathal

Kindal

Kokko

Lakooch

*Lampati

Laurel

*Machilus

Mahogany

*Maina

Makai

*Mango

Maple

Melia

Mullilam

*Mundani

Neem

Pali

*Piney

Peon

*Poplar

Pussur

Pyinma

Red Bombwe

*Red Dhup

Rosewood

*Rubber wood

*Semul

*Silver Oak

Sissoo

*Spruce

Pinus wallichiana (Syn. P. excelsa)

Holoptelea integrlfolia

Cullenia rosayroana

(Syn. C. excelsa)

Artocarpus heterophyllus

(Syn. A, integr$oiius)

Term inalia paniculata

Albizzia Iebbeck

Artocarpus [akoocha

Duabanga grandijlora

(Syn. D. sonneratioides)

Terminalia alata

(Syn. T. coriacea, T. crenulata)

Machilus spp.

Swietenia spp.

Teterameles nudljlora

Shorea assamica

Mangijera spp.

Acer spp.

Melia dubia

Zanthoxylum rhetsa

(Syn. Fagara budrunge; Z. bundurunga;

Z. limonella)

Acrocarpus fraxinl~oiius

Azadirachta indica

Palaquium ellipticum

Kingiodendron pinnatum

(Syn. Hardwickiapinnata)

Calopyllum spp.

Populus Spp.

Xylocarpus spp.

Lagerstroemia hypoleuca

Planchonia valida

(Syn. P. andamanica)

Parishia insignis

Dalbergia latl~olia

Hevea braziliunsis

Bombczx ceiba

Grevillea robusta

Dalbergia sissoo

Picea smithiana

(syn. P. morinda)

KAL

KAN

KAR

KAT

KIN

KOK

LAK

LAP

LAU

MAC

MAG

MAI

MAK

MAN

MAP

MEL

MUI

MUN

NEE

PAL

PIN

Poo

POP

Pus

PYI

RBO

RDH

ROS

RUB

SEM

SOA

SIS

SPR

6

IS 1659:2004

Standard Trade Name Botanical Name Abbreviation

Teak Tectona grandis TEA

Toon Toona ciliata Too

(Syn. Cedrela toona)

*Vatica Vatica spp. VAT

*Vellapine Vateria Indica VEL

Walnut Juglans regia WAL

*White Bombwe Term inalia procera WBO

White Cedar Dysoxylum malabaricum WCE

White Chuglam Term inalia bialata WCH

*White Dhup Canarium spp. WDH

NOTE — Species of timber to be treated (see 6.1) are indicated by star ( * ).

IS 1659:2004

ANNEX C

(Clauses 5.1.2 and 6.1)

TIMBER FOR FACE VENEERS OF DECORATIVE TYPE BLOCK BOARDS

Standard Trade Name Botanical Name Abbreviation

Birch

Bela

Champ

Chaplash

Chikrassy

Cinnamon

Devdam

Dipika (Lapse)

Gandelipoma

Kanju

Kokko

Laurel

Mahogany

Makai

Maple

Mullilam

*Narikel

Padauk

Peon

Rosewood

*Siris

Sissoo

Teak

Walnut

White Cedar

White Chuglam

Betula, spp.

A40rus laevigata

A4ichelia spp.

Artocarpus chaplasha

Chukrasia velutina (Syn. C. tabularis)

Cinnamomum spp.

Dyso.xylum binectar~erum

Mansonia dipikae

Dysoxylum hamiltonii

Holoptelea integrfolia

Albizzia lebbeck

Terminalia alata (Syn. T. coriacea, T. crenulczta)

Swietenia spp.

Shorea assamica

Acer spp.

Zantho~lum rhetsa

(Syn. Fagara budrunge; Z. budurunga; Z. Iimone[la)

Pterygota alata

Pterocarpus dalbergioides

Calophyllum spp.

Dalbergia latl~olia

Albizzia chinensis

Dalbergia sissoo

Tectona grandis

Juglans regia

Dysoxylum malabricum

Terminalia bialata (sapwooc$

BIR

BOL

CHM

CHP

CHI

crN

DEV

DIP

GEN

KAN

KOK

LAU

MAG

MAK

MAP

MUI

NAR

PAA

Poo

ROS

SIR

SIS

TEA

WAL

WCE

WCH

NOTE — Species of timber to be treated (see 6.1) are indicated by star ( ●).

8

IS 1659:2004

ANNEX D

(Clauses 8.1.5 and 8.2.3)

TEST FOR THICKNESS AND VARIATION IN THICKNESS

D-1 PROCEDURE approximately 20 mm inside the edges of the test

D-1. I Each board shall be tested for thickness.pieces, at four corners, and at midpoints of the longedges.

D-1. 1.1 Thickness D-2 REPORTING OF TEST RESULTS

The thickness shall be measured in millimetres to an The mean thickness of each of test samples shall beaccuracy of +0.02 mm. Six readings shall be taken reported.

ANNEX E

(Clause 9.2.1)

TEST FOR DETERMINING DIMENSIONAL CHANGES CAUSED BY HUMIDITY

E-1 PROCEDURE

E-1.1 The test specimens shall be conditioned in anatmosphere maintained at 27 + 2°C and 65 + 5 percentrelative humidity to constant mass. The length of eachtest specimen shall be measured to an accuracy of+0.s mm making use of a jig which permits the test

piece to be pressed against a flat plate to eliminate theeffect of any warping that may have occurred. Thethickness of each test specimen shall be measured, toan accuracy of 0.02 mm at three marked points, one ateach end and one at the mid point of its length.

E-1.2 Half the number of these test specimens shallthen be placed in an atmosphere maintained at 90 + 5percent and other half in 40 k 5 percent relativehumidity at 27 + 2°C and they shall be weighed and

measured from time to time at such intervals as may berequired until constant mass and dimensions areobtained.

E-2 REPORTING OF TEST RESULTS

The differences in length and thickness as comparedwith those of the conditioned test specimen shall bereported for each test specimen at each relativehumidity.

NOTE — If a controlled humidity chamber is not available,the required atmospheres may be obtained approximately byusing an airtight vessel containing moist salts as follows:

90 percent relative humidity : Sodium carbonate

65 percent relative humidity : Ammonium nitrate

40 percent relative humidity : Magnesium chloride or zincnitrate hexrdrydrate

ANNEX F

(clauses 9.2.2.1 and 9.2.2.2)

TEST FOR DETERMINING RESISTANCE TO WATER

F-1 PROCEDURE

F-1. I For testing of BWP Grade block boards, testspecimens shall be submerged in a pan of cold water,care being taken that the pieces do not touch the bottomof the pan. Water shall then be brought to the boilingtemperature and maintained at this temperature for 72h. The test specimens shall then be removed from theboiling water and plunged immediately into cold water.The 72 h period may be reckoned as an aggregate ofshorter periods of boiling, the test specimens being leftin cold water between such periods when the water isnot boiling.

F-1.2 For,testing of MR Grade block boards, the testspecimens shall be submerged in a pan of cold water,care being taken to see that they do not touch the bottomof the pan. Water shall then be brought to thetemperature of 60 + 2°C and maintained at thistemperature for 3 h. The test specimens shall then beremoved from the hot water and plunged immediatelyinto cold water.

F-2 REPORTING OF TEST RESULTS

The results shall be reported as ‘pass standard’,‘excellent’ or ‘poor’ after carrying out the tests as inAnnex G.

9

IS 1659:2004

ANNEX G

(Clauses 9.2;3 and F-2)

TEST FOR ADHESION OF PLIES

G-1 APPARATUS

G-1. 1 The type of knife required to be used in thetest is given in Fig. 1. It maybe made from a file. Thecutting edge should be kept chisel sharp.

G-1.2 The test shall be carried out on a stout table towhich is screwed a wooden batten against which theedge of the test specimen is placed as indicated inFig. 2.

G-2 PROCEDURE

G-2. 1 The knife is inserted with its cutting edge parallelto the grain of the outer veneer and worked into, or ifpossible, along a glue line and the veneer is piercedupward. A hard and dense species requires considerableforce to effect entry and to pierce the veneer. In a sotlspecies, the knife tends to follow any easy coursethrough the wood and in this case, it is essential thatthe knife be firmly guided along the glue line.

G-2.2 Example of cases when the bond just passes therequirements is indicated in Fig. 3 and this is judged bythe relative amounts of wood fibre left on the coreveneer, and the area pierced off. The grading is assessedchiefly on the appearance of the break but is aconcomitant requirement that the force shall be neededto effect separation.

G-2.3 The bond is excellent when it is difficult tofind the glue line and impossible to keep the toolwithin it for more than 6 mm without cutting intoadjacent wood. On piercing upwards, the veneer usuallybreaks off over width only slightly greater than that ofthe tool. Examples of excellent bond are illustrated inFig. 4.

G-2.4 The bond is poor when the knife meets little

opposition into the glue line and the pierce results inthe easy removal of almost all the veneers from oneside of the test specimen. The separated veneers areusually almost free from adherent fibre. Examples ofpoor bond are illustrated in Fig. 5.

G-3 REPORTING OF TEST RESULTS

The results shall be reported as ‘pass standard’,‘excellent’ or ‘poor’ (see Fig. 3, Fig. 4 and Fig. 5).Block boards designated as poor shall be declared asunsatisfactory.

G-4 TEST FOR GLUE ADHESION BETWEENCORE AND ADJOINING VENEERS

G-4. 1 To test the glue adhesion between the coreand the adjoining veneers, the qualitative test asgiven in G-4.1.1 maybe used.

G-4.1.1 The central core strips shall be forciblyseparated from its adjacent veneers by a chisel insertedin the bond line and affecting the separation in thedirection of the core strips. The capacity of the bondshould be judged by the relative amount of wood fibresleft by the veneer and core strips. Force shall be neededto effect the separation. The grading should be assessedon the basis of the appearance of the failure. The bondshould be considered excellent when it is difficult tofind the glue line clearly for more than 10 mm lengthalong the battens and on its entire width without tomfibres appearing on the area of separation. The bondshould be considered as poor when the chisel meetslittle opposition in the glue line and if there is an easyseparation between the core strips and the veneers. 1fthe glue adhesion between battens of the core in a blockboard in which the core strips are bonded is to be tested,a similar procedure and criteria may be followed.

10

IS 1659:2004

A KNIFE OF THIS KIND CAN BEMADE FROM 250x 25 mm FILE

FIG. 1 KNIFE FOR TESTING PLYWOOD FOR ADHESION OF PLIES

FIG. 2 METHOD OF TESTING FOR ADHESION

IS 1659:2004

FIG. 3 EXAMPLE OF ‘MINIMUM PASS’ STANDARD

..

FIG. 4 EXAMPLE OF ‘EXCELLENT’ ADHESION

12

IS 1659:2004

FIG. 5 EXAMPLE OF ‘POOR’ ADHESION

13

IS 1659:2004

ANNEX H

(Clause 9.2.4)

MYCOLOGICAL TEST

H-1 PROCEDURE

H-1.l Aflatrectangular dish ofenamelled iron, glassor porcelain (such as a photographic developing dish)shall be filled to a depth not less than 25 mm with alayer of sawdust obtained from a non-durable timber

Iike Semul (Salmalia malabarica), in its naturalcondition. The sawdust shall have previously beenmoistened with water containing 14 g/litre of sucrose(normally cane sugar would be used but if not available,30 g of commercial malt extract may be substituted) sothat it is saturaled with moisture, but not so wet thatfree water can be squeezed out of it by hand pressure.To attain this condition with dry sawdust, it is usuallynecessary to add water three times of its mass.

H-I.2 The sawdust shall then be charged with sporesof commonly occurring Indian fungi looselycompacted, and the test specimens then pressed down

into it so that their upper surfaces are in level with thetop of the sawdust layer.

H-1.3 The dish shall then be covered with a sheet ofglass and the edges of the dish sealed against glass witha strip of material, such as modelling wax, so that theatmosphere round the test specimens shall remainsaturated with water vapour.

H-1.4 The dish and contents shall be maintained at27 + 2°C for a period of 3 weeks in a suitablethermostatically controlled incubator, after which thetest specimens shall be removed, washed in cold wateruntil cool and whilst still water soaked, shall be checkedfor compliance with the requirements of 9.2.4.

H-2 REPORTING OF TEST RESULTS

The test results shall be reported as conform ing to thestandard or otherwise.

ANNEX J

(Ckwe 9.2.5)

TEST FOR MODULUS OF RUPTURE AND MODULUS OF ELASTICITY

.J-l PROCEDURE

The span shall be 20 times the nominal depth. The loadshall be applied through appropriate loading block forcentre loading with a continuous motion of the movablehead. The testing machine shall move at a constant rateof 5 mm/min throughout the test till a failure isindicated.

J-2 REPORTING OF TEST RESULTS

Data for load deflection curves may be taken todetermine the modulus of rupture and modulus ofelasticity using the formulae given below. Deflectionreadings shall be recorded to the nearest 0.02 mm.Increments of load shall be so chosen that not less than12 and preferably 15 or more readings of load anddeflections are taken to the proportional limit.

3P’LModulus of rupture, N/mm* = —

2 b~

PL3Modulus of elasticity, N/mm* = —

4b@A

where

P’=

p=

L=

B=

d=

A=

maximum load, in N;

load, in N, at the limit of proportionalitywhich shall be taken as the point in load-deflection curve above which the graphdeviates from the straight line;

span of the test specimens, in mm;

breadth of the test specimen, in mm;

depth of the test specimen, in mm; and

deflection in mm at the limit of proportionality(which is corresponding to P in the load-deflection graph).

14

IS 1659:2004

ANNEX K

(Clause ;.2.6)

METHOD FOR THE DETERMINATION OF PENETRATION ANDIDENTIFICATION OF PRESERVATIVE BY SPOT TEST

K-1 GENERAL

Preservative treatment is carried out in timber used forcore stock of block boards as per IS 401. Preservativesused are generally water soluble leachable preservativeslike boric acid or borax. Water soluble fixed typepreservatives like copper-chrome-arsenic, acid-cupric-chromate, berated-copper-chrome or ammoniacal-copper-arsenite are also used.

Method for the determination of penetration of copper-chrome-arsenic composition and acid-crupric-chromateand ammoniacal-copper-msenite composition are givenbelow. Definite colour reactions are not given by othercommon preservatives.

K-2 COPPER-CHROME-ARSENICCOMPOSITION ACID-CUPRIC-CHROMATECOMPOSITION BORATED-COPPER-CHROMECOMPOSITION AND AMMONIACALCOPPER-ARSENITE COMPOSITION

K-2. 1 Detection for Copper

K-2.1.1 Dissolve 0.5 g chrome Azurol-S, 5.0 g ofsodium acetate in 80 ml water and dilute to 100 ml.

K-2.1.2 Spray or brush the solution over split or crosssection or boring/bore dust with a fine spray on the cutsurface of treated wood. A deep blue colour shows thepresence of copper.

K-2.2 Detection for Chromium

K-2.2. 1 Dissolve 0.5 g - diphenyl carbazide in 50 mlisopropyl alcohol and 5’0ml of distilled water.

K-2.2.2 Spray or brush the solution on the boring/boredust or cross section of treated wood. Portionscontaining chromium will develop a purple colour,while unpenetrateduntreated portion will remain assuch.

K-2.3 Detection for Arsenic

K-2.3. 1 Solution 1

3.5 g ammonium molybdate dissolved in 90 ml distilled

water followed by 9 ml concentrated nitric acid.

Solution 2

0.7 g benzidine dihydrochloride dissolved in 10 mlconcentrated acetic acid and diluted to 100 ml by adding90 ml distilled water.

Solution 3

30 g stannous chloride dissolved in 100 ml I:1hydrochloric acid in distilled water.

Solution 1 maybe prepared fresh for each day testing.Solution 2 and Solution 3 maybe stored in clean glassstoppered brown glass bottles for one week.

K-2.3.2 Apply Solution 1 to the boring or cross sectionensuring that entire wood surface is saturated. After 2rein, excess solution is shaken off and allowed to dryfor about 1 min. Solution 2 is next applied in the sameway as Solution 1. After 2 rein, the excess solution isshaken off and surface is allowed to dry for 1 min.Solution 3 is last applied by pouring over cross sectionor boring beginning at untreated part. The entire woodsurface will immediately turn bluish.

K-3 METHOD FOR THE DETECTION OFBORON IN BORAX: BORIC ACID, CCB,BCCA

K-3.1 Solution 1

Extract 10 g turmeric powder with 90 g ethyl alcohol.Decant or filter to obtain clear solution.

K-3.2 Solution 2

20 ml of concentrated hydrochloric acid diluted to100 ml with ethyl alcohol and then saturated withsalicylic acid (about 13 g per 100 ml).

K-3.3 Solution 1 is applied on the dry cut surface ofwood or cross section by spraying or with a dropperand the surface is allowed to dry for a few minutes.Solution 2 is then applied in a similar manner to theareas that have been coloured yellow by the applicationof Solution 1. The colour changes shall be observedcarefully. Areas having presence of boron turn red.

15

IS 1659:2004

ANNEX M

(Foreword)

COMMITTEE COMPOSITION

Wood and Other Lignocellulosic Products Sectional Committee, CED 20

OrganizationIndian Plywood Industries Research and Training Institute,

BangaloreAll lndia Agro-Board Association, Pune

Building Materials & Technology Promotion Council, New Delhi

Central Building Research Institute, Roorkee

Central Public Works Department, New Delhi

Civil Aviation Department (Technical Centre), New Delhi

Coir Board, BangaloreCouncil of Architecture, New DelhiDirectorate General of Supplies & DLsposals,HyderabadDirectorate of Standardization, New Delhi

Engineer-in-Chiefs Branch, New Delhi

Federation of Indian Plywood& Panel Industry, New Delhi

Forest Research Institute, Debra Dun

Indian Academy of Wood Science, Debra ~un

Indian Plywood Industries Research & Training Institute,Bangalore

Institute of Wood Science & Technology, BangaloreJolly Board, Mumbai

Kutty Flush Door& Furniture Co Pvt Limited, ChennaiTimpack Pvt Limited, BymihatMangalam Timber Products Limited, Bangalore

Ministry of Defence (DGQA), Krmpur

Ministry of Defence (R&D), New DelhiMinistry of Railways, Lucknow

National Test House (ER), Kolkata

Northern India Plywood Manufacturer Association, Jalandhar

Novopan India Limited, Hyderabad

Nuchem Limited, New Delhi

Permalli Wallace Limited, Bhopal

The South Indian Plywood Mfrs Association, ChennaiThe Western India Plywood Limited, CannanoreIn personal capacity (H,No, 12, HIG, lsl Stage, K.H.B. Colony,

Bosaveshwora Nagar, Bongolore 560079)BIS Directorate General

Representative(s)DRC. N. PANDSY(Chairman)

Smu v. s. RAroREPRS5E~AnvE(Allernate)

SHRIJ. K. pRASADSsuuA. K. TIWASS(Alternate)

DRY. SINGHDRL. K. AGARWAL(Alternate)

Stau SURINDERKUMARSHSUS. K. VERMA(,4ffernote)

Sma B, V. JOSHSSHNN. M. WALECHA(Alternate)

JoItw DIRECTORRepresentativeSHMM. GANGARASUDR(SHIUMATI)lNOUGOPTA

Smu G. K. SHARMA(Alternate)SHRIMATSMEENAKSHI

%ruMAnAMSTAR&r(Alfernate)Smu JAYADEEPCHnLANGIA

SMUS. P. GOENKA(Alternate)DMSXTOR

REPRE5ENTATrvE(Alfernote)SECRETARY

JOINTSECRETARY(Ahernote)SMU K. SHYAMASONDAR

WrrcrS. PADMANABHAN(Alternate)DRK. S. RAOSmr Ammo JOLLY

StrruP. K. DASGOFTA(Wternote)CoLY. G. KRISHNANRSPRESE~ATtVESsmrK. SRIDHAR

SHRSANILTALWAR(Alfernofe)SHIURAMCHANDRA

SsrraJ. K. SINHA(Alternate)SNSURAVSNOERKUMARDIRECTORSTANOAROS(CARRIAGE)

ASSISTANTDIRSCTOR(Al/emote)Stmr D. K. KANUNGO

ERRAJSNDERKAPUR(Alternate)SHSUN. K. TIWAIU

Smr ANILGOSL(Alfernde)Strru S. A NAQUt

WattA. V. V. IUOHAVACHARYA(Alternate)Woo SOOEVBARAR

SHIUPRAVEENKUMAR(Alfernate)Sims S. K. KADESIA

SHSUB. S. PARMAR(A/ternote)SHRSK. SANKARAKRISHNANSwcrP. K. MOHAMSOSmu S. S. ZOOLAGUO

SHRIS. K. JAJN,DIRECTOR&HEAD(CED)[Representing Director General (Er-o~cio)]

Member-SecretorySsou J. C. ARORA

Director (CED), BIS

16

IS 1659:2004

Wood, Other Lignocellulosic Based Building Boards and SpecialityWood Products Subcommittee, CED 20:6

Organizationin personal capacity [No. 179, 24#r B-Cross, 3rd Block,

Jayanagar, Bangalore 560011]Arunachal Plywood Industries Limited, Kolkata

Bharat Heavy Electrical Limited, Bhopal

Central Building Research Institute, Roorkee

Central Coir Research Institute, KalavoorCentral Public Works Department, New Delhi

Coir Industrial Products Co-operation Society Limited,Bangalore

Council of Architecture, New DelhlDGS & D, New DelhiEngineer-in-Chief’s Branch, New Delhi

Federation of Indian Plywood and Panel Industry, New DelhiForest Research Institute (Forest Products Division), Debra Dun

Godrej & Boyce Manufacturing Company Limited, Mumbai

Indian Plywood Industries Research & Training Institute,Bangalore

Institute of Wood Science and Technology, Bangalore

Integral Coach Factory, ChennaiJolly Board Limited, Mumbai

Kutty Flush Doors and Fumiture.Company Pvt Limited, Chennai

ECO Board Industries Limited, Pune

Kerala State Bamboo Corporation, CochinNCL Industries Limited, Hyderabad

Mangalam Timber Products Limited, Kolkata

Ministry of Defence (D.GQA),Kanpur

Ministry of.Defence (R&D), Kanpur

Ministry of Railways, Lucknow

Natura Fibretech Pvt Limited, Bangalore

North India Plywood Manufacturing Association, Jalandhar

Novopan lndia Limited, Hyderabad

Nuchem Limited, Faridabad

Permali Wallace Limited, Bhopal

The Gurdit Institute Pvt Limited, Dharwad

Tl]e Mysore Chipboards Limited, MysoreThe South lndian Plywood Manufactmers’ Association,

KoyambeduThe Western India Plywood Limited, Cannarsore

In personal capacity (5/6, lsfjloor, 13th ‘B’ Main, HAL,2nd Stage, Indira Nagar, Bangalare 560008)

in personal capacity (C/o Western India Plywood Ltd.ltaliapatam,Cannanore670010)

Representative(s)DRH. N. JAGADEESH(Convener)

SHRJM. M. JALANSHRJJ. PRASHAD(Aliernote)

Strar M. V. PRABHAKARSmu S.K. GUPTA(A/teFnate)

DRL, K. AGGARWALSmu B. SINGH(Alternate)

Smu M. SUDHAKARANPILLAISUPERINTENDINGENGUWER(S&S)

Exsctrnw ENGINEER(S&S) (Afternale)SHRJMANOJKrJMAR

Smu WAY GHORPADE(Alterna/e)REPRESENTATJWSmu N. K. UPADHYAYSHRJMAmP. h4ESNAKSJSJ

COLN. A. KUMAR(A1/ernate)Rt3PRESENTATlVSHSADOFDsPARmmrr

DRS. P. S1rW.(Afternote)SHRJGUUSHV. NALAVADE

SHRJMANUBHAJM. SHAH(A/ternate)DRS. K. NATN

SHRJM. VENUGOPALNAIDtI (Afterrrafe)DRR. V. RAO

DR AJAYKARMAKAR(Alternate)REPRESE~ATIVSSHRIAmmo JOLLY

SHRIP. K. DASGuPT@hernote)SHRIK. SANKARAXAISHNAN

COLY. G. KSUSHNAN(Alternate)SHRJB. V. RAO

SNRJSIVASANKARKALJVE(Alternate)MANAGERSHRIA. R. RAJU

SHJUPRAKASHRAJO(Alternate)SHRJG. S. GUPTA

Smu G. R. PATNAIK(Alfernate)SHRJJ. K. SINHA

MAJR. N. SAIGAL(Alternate)SHSUP. S. SRIVASTAVA

SHRIRAVINDRAKUMAR(Alternate)DEPUTYDIRECTORSTANDARDS(CARRJ~GE)

ASSISTANTDIRECTOR(Alternafe)Smu TOMMYMATHEW

SHRJSUNJLVARGEESE(A/fernate)Smu SURJNDERARORA

SJUUNARESHTIWAJU(Alternate)Srrro S. A. NAQU

SmuA. V. V. RAGHAVACHARYA(AlternateSHRJSUDEVBARAR

DRR. M, MENTA(Alternate)SHJUS. K. KODSSIA

Smu B. S. PARMAR(Alternate)SHRJYASKARANSINGHLAULY ,

SHRIS. N. SHARMA(Alternate)SHRJA. ANANTHACHARSmu K. SANKARAKFOSHNAN

SECRETARY(A/fernate)Ssuu K. P. KAMALUDDIN

SHRJC. A. GAFODR(A//emote)+’

SHRJP. K. BAOCFD

SrsraP. K. MOHAMED

17

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Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of

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This lndiao Standard has been developed from Dot: No. CED 20 (7163).

Amendments Issued Since Publication

Amend No. Date of issue Text Affected

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