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है”ह”ह

IS 14960 (2001): Preservative treated and seasoned sawntimber from rubber wood (Hevea Brasiliensis) - [CED 9:Timber and Timber Stores]

Indian Standard

PRESERVATIVE TREATED AND SEASONEDSAWN TIMBER FROM RUBBER WOOD( Hevea brasiliensis ) — SPECIFICATION

Ics 79.040

0 BIS 2001

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Aug#st 2001 Price Group 3

Timber and Timber Stores Sectional Committee, CED 9

FORE WORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Timber andTimber Stores Sectional Committee had been approve’d by the Civil Engineering Division Council.

With the need to conserve natural forests for ecological reasons, we have to look for other sources of timber.One major alternative source of timber supply is plantations. Different fast-growing species like eucalyptus,poplar, babul, acacia, etc. have been planted in different parts of the country under schemes like social forestry,agroforestry, wasteland development, etc. Another source of timber supply is rubber ( Hevea brasiliensis )plantations. Utilization of timber from these species need to be promoted as this will help in decreasing thepressure on natural forests.

h40st of the fast-growing species are perishable and have problems with growth stresses and tension wood; theseneed to be properly processed ( preservative-treated and kiln-dried ) to make value-added products. It wasconsidered necessary to have a separate specification for preservative treated and seasoned sawn timber whichwill help in promoting quality value-added products from these species in gaining consumer acceptance andconfidence.

In the formulation of this standard, due weightage has been given to international coordination among thestandards and practices prevailing in different countries in addition to relating it to the practices in the field inthis country.

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

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 ( revised )’. The number of significant places retained inthe rounded off value should be the same as that of the specified value in this standard.

:2001 —

Indian Standard

PRESERVATIVE TREATED AND

IS 14960

SEASONED

SAWN TIMBER FROM RUBBER WOOD( Hevea brasiliensis) — SPECIFICATION

1 SCOPE

This standard covers the requirements of preservativetreated and seasoned rubber wood for different purposeslike furniture, cabinet, door and window shutters andframes, panel ling, flooring, toys, turnery, carving,household goods, etc.

2 REFERENCES

The Indian Standards listed at Annex A containprovisions which, through reference in this text,constitute provisions of this standard. At the time ofpublication, the editions indicated were valid, Allstandards are subject to revision, and parties. toagreement based on this standard are encouraged toinvestigate the possibility of applying the most recenteditions of the standards given at Annex A.

3 TERMINOLOGY

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

3.1.1 Tapping Mark

Dark brown marks due to wounds resulting from tapping,nailing and physiological reasons. Loose ingrown barkwhich will split during processing will not come underthis.

3.1.2 Mineral Streak

Whitish streaks due to the presence of starch or otherminerals.

4 REQUIREMENTS

4.1 Preservation

The timber shalI be treated as per IS 401 with thespecified preservative chemicals. The dry salt retention( DSR ) and penetration of the preservative chemic?l’sshall conform to the following values whendetermined in accordance with the methods given inIS 2753( Part 1):

Level of Chemical Retention and Penetration

Hazard Hazard DSR ( kg/m3J)

Class Condition CCA/CCB Boron]) Cu/Zn napnthenates2) PenetrationAbietates

H, Interior, protected from 5.0 5.0 0.5/0.6 throughoutweather, painted

H2 Interior, intermittent wetting 8.0 — 0.5/0.8 throughout

H~ Exposed to weather, not in 12.0 — 0.5/0.8 throughoutground contact

.-

Hq in ground contact 16.0 — — throughout

‘)Boric acid equivalent ( 1.54 parts of borax is equivalent to 1.0 part of boric acid ).

2,Calculated as Cu/Zn.

1

IS 14960:2001

4.2 Drying

The preservative-treated timber shall be seasoned asgiven in IS 1141. The dried timber shall be inspectedfor conformity to specifications of moisture contentand residual case hardening stresses.

4.2.1 Moisture Content

The moisture content of the seasoned timber, whendetermined in accordance with the method given inIS 11215, shall not exceed the specified value. If notspecified, the moisture content, at the time of inspectionat any time in the year and at any place in India, stiallconform to the limits specified in 1S 287 for differentend uses and zones of the country.

4.2.2 Case Hardening Stresses

The dried timber shall be inspected for residual casehardening stresses, wherever it is intended to be resawnor planed asymmetrically on opposite faces for precisionjobs or turned or carved to produce intricate shapesand designs, The timber shall be free from residualstresses when determined in accordance with themethod given in IS 1141.

4.3 The preservative-treated and seasoned timber shallbe sawn straight and square trimmed at the ends. Itshal Ibe free from brashness, knot holes, shakes, insectattack, borer holes, any kind of decay ( rot ), pitchpockets, and any other defect (except those permitted)( see 6 ), which is likely to reduce the strength anddurability.

5 DIMENSIONS AND TOLERANCES

5.1 Dimensions

The dimensions shall be as agreed to betweenmanufacturer and the purchaser.

5.2 Tolerances

5.2.1 The sawn and processed cut sizes shall be graded

into three grades, A, B and C, depending on toleranceand permissible defects.

5.2.2 The tolerances in sizes for different grades shailbe permissible as follows:

Grade A Grade B Grade C

+Smm +3mtn +3mm

–lmm –lmm –lmm

NOTE — The minus tolerance in width shall not bepermitted in more than 10 percent of the supplies acceptedat any one time.

6 PERMISSIBLEDEFECTS

The permissible defects for different grades are givenin Table 1. The measurement of defects shall be doneasper IS 3364 (Part2 ).

7 MARKING

7.1 Each bundle of processed timber shall be legiblyand indelibly branded on the coloured straps, theindication of the source of manufacture, the year ofsupply using at least 20 mm size letters for this purpose.Grade A shall have green strap, Grade B blue strapand Grade C white strap.

7.2 BIS Certification Marking

7.2.1 Each bundle may also be marked with the StandardMark.

7.2.2 The use of the Standard Mark is governed bythe provisions of the Bureau oflndian Standards Act,1986 and the Rules and Regulations made thereunder.The details of conditions under which the Iicence forthe use of the Standard Mark may be granted tomanufacturers or producers maybe obtained from theBureau of Indian Standards.

..--

2

A-

IS 14960:2001 —

Table 1 Permissible Defects for Processed Rubber Wood

1(“Clause 6)

—e.-~SINo,

(1)

i)

Grade A Grade B Grade CDefects

(2)

Live knots”( maximum size )number per metre

Dead knots

Checks ( maximum depth )

a) Up to 50 mm thickness

b) 51-100 mm thickness

c) Above 100 mm thickness

End splits ( ~argest at the endand added together )

tip

Spring

Twist

Bow

Centre heart

Tapping marks

Mineral streaks

Sapstain

(5)

40 mmOne on either face only

(3)

25 mmOne on one face only

Nll

(4)

30 mmOne on either face only

N1l Pin knots upto6 mm

ii)

iii)

2 mm

3mm

6 mm

3 percent of length

2 mm

3 mm

1 mm

2 mm

4 mm

Nll

6 mm

3 percent of lengthiv)

3 mm perv) 1 mm per

100 mm

2 mm per m

2 mm per m

2mmperrn

2 mm per

100 mm

3 mm per m

3 mm per m

100 mm

vi)

vii)

viii)

ix)

5 mm per m

5 mm per m

3 mm per m

Nil

5 mm per m

May be permittedwithout a split

NII

Tight tapping markson two faces

Nll

Tight tapping markson all four faces

150 mm in 1 m

x) Tight tapping markson one face only

Nllxi)

xii) Shall not be Shall not be Shall not bepermitted unlessotherwise specified

permitted unlessotherwise specified

permitted unlessotherwise specified

.-

ANNEX A

( Clause 2 )

LIST OF REFERRED INDIAN STANDARDS

IS NO. Title IS No. Title

in treating solutions: Part 1Determination of copper, arsenic,chromium, zinc, boron, creosote andfuel oil (Jrsr revision)

Method of measurement andevaluation of defects in timbe~Part 2 Converted timber (firstrevision )

Method for determination ofmoisture content of timber andtimber products

287:1993 Recommendations for permissiblemoisture content fir timber used fordifferent purposes ( third revision)

Code of practice for preservation oftimber [ third revision )

401:1982

707:1976 Glossaryofterms applicable to timber 3364 ( Part2 ):

technology and utilization (second 1976

revision )

1141:1993 Code of practice for seasoning oftimber (second revision ) 11215:1991

Methods for estimation ofpreservatives in treated timber and

3

2753 (Part 1):1991

IS 14960:2001

ANNEX B

( Foreword)

COMMITTEE COMPOSITION

Timber and Timber Stores Sectional Committee, CED 9

Chairman

SHRI SH~A~ SUNDER

Members

SHRI S. KUMAR

SHRI S. C. MALHOTRA( Alternate )

SHRI A. C. LAKSHAMANA

DR K. A. KUSHALAPPA( Alternate )

SHRI R. C. P~ASAD

SHRI B. M. PRASAD( Alternate )

DRY. SINGH

DR L. K. AGARWAL( Alternate )

SHRtN. M. WALECHA

SHRI ANAND PRAKASH( Alternate )

DEPUTY DIIWCTOROF NAVALARCHtTEYXU~E

ASSISTANTDIRECTOROF NAVALARCHtTSCTURE

( Alternate)

SHRI D. B. JAIN

SHRI DARIIARASINGH ( Alternate )

SHRI M. R. GHAI

LT-COL M. V. RANGAIAH

SHRI B. B. SHAMBARKAR

SHRI A. K. AGARWAL( Alternate )

SHRI S. P. GOENKA

SHRI JAYDEEPCHITLANGIA( Alternate )

CHIEF CONSERVATOROF FORESTS( MGT )ADDITIONALCHIEF CONSERVATOROF FORESTS

( Alternate)

SHRI B. A. MATNEWS

SHRI SHIVAPRAKASH( Alternate )

REPRESENTATIVE

CHIEF CONSERVATOROF FORESTS

CONSERVATOROF FORESTS( Alternate )

CHIEF CONSERVATOROF FORESTS

SHRI G. P. BADOLA

SHRI ATUL KHERA ( Afternafe )

DIRECTOR

SHRI K. S: SHUK~ ( Alternate )

SHRI A. K. BANSAL

SHRI K. DAMODARAN( Alternate )

SHRI P. T. S. MENON

Representing

In Perso~al Capacity ( 29891D 12th Main, HAL II Stage, Barrgalore560008 )

Andaman Chamber of Commerce and Industries, Kolkata

Bamboo Society of India, Bangalore

Bihar State Forest Development Corporation Ltd, Patna

Central Building Research Institute, Roorkee

Directorate General of Civil Aviation, New Delhi

Dkectorate of Naval Architecture, New Delhi

Directorate General of Supplies and Disposal, New Delhi

Directorate General of Grdinance Factories, Gun Carriage Factory,Jabalpur

Dkectorate General of Border Roads, New Delhi

Engineer-in-Chief’s Branch, Army Headquarters, New Delhi

Federation of Indian Plywood mrd Panel Industries, New Delhi

Forest Department, Government of U P, Nainital

Forest Department, Andaman and Nicobar Islands, Port Blair

Forest Department, Government of Arunachal Pradesh, Itanagar

Forest Department, Government of Himachal Pradesh, Simla

Forest Department, Government of Karnataka, Bangalore

Forest Department, Government of Madhya Pradesh, Bhopal

Forest Research Institute, Debra Dun

Indkur PtywcmdIndustries Research and Training Institute, Bangalore

Indian Plywood Manufacturing Co Ltd, Mumbai

( Continued on page 5 )

4

_&

1S 14960:2001 —

( Confirruedjirom page 4 )

Representing

Indian Tea Association, Kolkrrta

Members.

SHtU S. GHOSH

SHIU M. DAS GUPTA ( Alternate )

SHRIA. K. ANANTHANARAYANA

SHWMATIB. S. KAMALA( Alternate )

Institute of Wood Science and Technology, Bangalor’e

Kerala Forest Research Institute, Peechi

Kutty Flush Doors and Co Pvt Ltd, Chenrmi

D~ R. GNANAHARAN

SHRIK. SANKARAKUISHNAN

SHRI D. R. ANANTHAKIUSHANANA( Alfernate )

Ministry of Defence, Director of Standardization, New Delhi

Ministry of Defence ( DRDO ), Kanpur

LT-COL S. DUTTA

SHIU B. S. NAIOJLA( Afrernafe )

Sriru ANIL AtiARWAL

SHFUH. C. PANT ( Alternate )

Minislry of Environment and Forest, New DelhiINS~ECTORGENEItALOI’ FOWXTS

ADIXTIONALINSPUCTORGENIZRALOF FORESTS( Alternare )

National Test House ( ER ), KolkataSHRI D. K. KANUNCiO

SHIO B. K. MAN~Al ( Alternate )

Railway Board, New DelhiDIRECTOR( TRACK)

JOINT DIIWTOR CE ( TM ) ( Alternate ) ,.,Tea Board, KolkataDRT. C. CHOU~HARY

The Karrmtaka State Forest Industries Corporation Ltd, Bang:doreSHRI ERApPA

SHRI S. K. CHAKRABURTY( Alternate )

WIMCO Limited, New DelhiSHtU S. SUIJRAMONI

SHW S. S. AKBAR ( Alternate )

In Personal Capacity (C-59 Inderpuri, New Delhi 110012 )

In Personal Capacity ( Pratap Narsery lane, Pmrdirwari, Dekra DLUZ248007 )

Forest Department, Mizoram, Aizawl

Indian Tobacco Company, Secundembad

Director General, BIS ( Ex-officio Member)

DR A. N. NAYEN

SHRI K. S. Pw+u

REPRESENTATIVE

REPRESENTATIVE

SHRI S. K. JAIN,

Director ( Civ Engg )

Member-Secretary

SHRIMATIRACHNASEHGAL

Deputy Director ( Civ Engg ), BIS

( Conlinued on page 6 )

5,

$,—

-1S 14960:2001

( con/i/wd@/11page 5 )

Mmbers

SHIU P. P. GUPTA

SHWA. V.11. MuwrY(Ahrnafe)

W M. D. MI:III<OTI{A

SHIU S. N. KHAN ( A/fernafe )

DR INDRA DIW

Titmber Treatment Subcommittee, CED 9:12

Representing

Kerala Forest Research Institute, Peechi

Si+u T. CHAWRA MCXJLCLSWARAM

SHRI B. L. GOKLU.OAS( Alternate )

DIRI:CTtM< ( TRACK )

JOINT lhRI:cT(N< ( TRACK ) ( A/rernofe )

Stll{ls. PANI)I.Y

StlluJ. t? Btmlu)wM ( A/ternare )

DR S. P. SINCiIi DHAKAIWY

SIIRI J. K. SINIIA ( A/termfe )

SHIU P. T. S. MINON

SIHU S. PADMANAIHIAN

SHHIMATI KAMAI, ( A/fernafe )

SIIHI C. BHASKAHE NAIL+

Stuu V. J. MATHI;WS ( Alternate j

SHIU A. P. MISHRA

RIWUWNTATIVI;

RILVIU,SI;NTATIW

RI: VIU;SI.NIATIVIi

RIWIWSI.N txrlvl:

Rl;l)l<liSl;N”rATIVl;

ASCU Hickson Limited, Kolkata

Forest Pathology Division, Forest Research Institute, Debra Dun

Forest Products Division ( Wood Preservation ), Forest Research

Institute, Dehrtr Dun

Borax Morarji, Mumbai

Ministry of Railways, New Delhi

Directorate of Standardization, Ministry of Defence, New Delhi

Control lerate of Quality Assurance ( General Stores). Ministry of

Defence, Kanpur

The Indian Plywood Manufacturing Co Pvt Ltd, Mumbai

Indian Plywood Industries Research and Training Institute, Bangalore

Indian Rubber Wood Task Force, Kottayam

Gujarat State Forest Development Corporation, Vadodara

Andaman Timber Industries, Port Blair

U. P. Export Corporation, Saharanpur

Madhya Pradesh Forest Development Corporation, Bhopal

Karnotoka State Forest Industries, Bangalore

Building Materials Technology Promotion Council, New Delhi

Indian Wood Science turd Technology, Bangalore

i

1’

6

.

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Amendmerits are issued to standards as the need arises onthe 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 issueof ‘BIS Catalogue’ and’ Standards: Monthly Additions’.

This Indian Standard has been developed from Doc : No. CED 9 ( 5766 ).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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