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इंटरनेट मानक 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. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 9096 (2006): Preservation of bamboo for structural purposes - Code of practice [CED 9: Timber and Timber Stores] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” .., V7@v7Fm . Ti?wrmm idHtt@immiwbRWmRi Wi’lwi’ ( W37 yy!tm ) Indian Standard PRESERVATION OF BAMBOO FOR STRUCTURAL PURPOSES — CODE OF PRACTICE (First Revision ) ICS‘71.1OO.5O7;9.020 ,,,, Y’ . @BIS2006 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 Apri[ 2006 Price Group 2 I’imber andTimbers Stores Sectional Committee, CED9 FOREWORD This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized. by the Timber and Timbers Stores Sectional Committee had been approved by the Civil Engineering Division Council. Bamboo which occupy a prominent place in every day life, is used for structural purposes like”posts, pole fencing, scaffoldings, house buildings, etc. Bamboo compares favorably with suchtimber as ‘sal’ and ‘teak’ instrength properties. But bamboo has lownatural durability (1 to 3years) against attacks by fungi and insects. They are very difficuItto betreated bynormal-preservative methods indry condition since their outer andto some extent inner membranes are impermeable to liquids. The treatment of bamboo is, therefore, best carried out ingreen condition. The standard was first published in 1979. This revision is based on experience gained since publication of the standard. In this revision. preservatives such as copper-chrome-zinc-arsenic composition and chromated zinc chloride have been deleted. Copper-chrome-zinc-arsenic (CCZA) composition has been deleted as it is similar to copper-chrome-arsenic (CCA) composition and additional zinc will not have any difference intoxicity. Chromated zinc chloride has been deleted as zinc has a lower toxicity than copper. Zinc chloride being hydroscopic, any unreacted salt in wood causes sweating of treated bamboo products. Further, the recommended practice with regard to preservatives, their concentration, absorption and methads of treatment for various structural uses have also been redefined. 1n the formulation of this standard due weightage has been given to international co-ordination among the standards and practices prevailing in different countries in addition to relating it tothe practices in the field in this country. For the purpose of deciding whether a particular requirement of this standard is complied with, the. final \’alue, observed or calculated expressing the result of a test or analysis, shall be rounded off in accordance with 1S2 : 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. IS 9096:2006 Indian Standard PRESERVATION OF BAMBOO FOR STRUCTURAL PURPOSES — CODE OF PRACTICE (First Revision ) 1 SCOPE coal tar distillate with aboiling point range above200”Candiswidelyusedadmixed with 1.1 This standard covers types of preservatives and fuel oil. A creosote fuel oil mixture in the treatment procedures ofbamboos used for structural ratio of 50:50 is found suitable. The fuel purposes likepost, scaffoldings, housebuilding, walls, oils ensure stability to creosote against trusses, etc. Italso includes recommendations onthe evaporation and bleeding from the treated choice oftreatment depending upon the various uses bamboo. The creosote used shall conform to which the bamboo is put. toIS218. 1.2 This standard does not cover the treatment of b) Copper-Chrome-Arsenic Composition — A bamboo fornon-structural purposes, which iscovered typical composition of this preservative inIS 1902. comprisesofcopper sulphate (CuSOd.5~0), 2 REFERENCES arsenic pentoxicfe(As205.2H20) and sodium orpotassium &lchromate(Na2Cr207.2Hz0 or The following standards contain provisions which K2Cr2072HzO) in proportion of 3 : I : 4; through reference inthis text, constitute provisions conformingto IS I0013 (Part 2). ofthisstandard. Atthetimeofpublication, theeditions c) Acid- Curpric-Chromate Composition — indicated were valid. All standards are subject to Atypical composition of this preservative revision and parties to agreements based on this comprises of 1.68 parts chromic acid standard areencouraged to investigate thepossibility (Cr20J (equivalent to 2.5 parts of sodium of applying the most recent editions ofthe standards bichromate), 50 parts of copper sulphate indicated below: (CuSOd.5HzO) and 47.5 parts of sodium MNo. Title bichromate (NazCr207.2H20); conforming tolS 10013(Part 1). 218:1983 Specification for creosote oil for use as wood preservatives (second d) Copper-Chrome-Boron Composition — A revision) typical composition of the preservative comprises of boric acid (H3BOJ, copper 401:2001 Preservation of t imber — Code of sulphate -(CUS04.5H20) and sodium or practice ~ourth revision) potassium bichromate (NazCrz07.2Hz0 1902:2006 Preservation ofbambooandfornon- or K7Cr207.2HzO) in the proportion of structural purposes — Code of 1.5: ~: 4;conforming to IS 10013(Part 3). practice (second revision) e) Boric-Acid-Borax — This has been used successfully against Iyctusborers. Amixture 10013 Specification for water soluble inratio of 1: 1.5isfound more suitable. type wood preservatives: o Copper-Zinc-Naphth enate/A bietate,s — (Part l): 1981 Acid-copper-chrome (ACC) wood These are copper and zinc salts of preservative naphthenic/abietic acid. (Part 2): 1981 Copper-chrome-arsenic(CCA)wood 4 METHODS OF TREATMENT preservative Details of the method of treatment of bamb,oo by (Part 3): 1981 Copper-chrome-boron (CCB) wood surface application (brushing, dipping), vacuum/ preservative pressure process, hot and cold process, Fast 3 RECOMMENDED PRESERVATIVES fluctuating pressure (FFP) process -and Boucherie process aregiven inIS401. Inaddition tothe above, The following are the various preservatives diffusion process,modified Boucherie processes and recommended for treatment of bamboos Steeping or Butt end treatment method asapplicable (seealso IS401) tothe treatment ofbamboo(non-structural) given in a) Coal Tar Creosote — This is a fraction of IS 1902mayalso beemployed. 1 IS 9096:2006 5 CHOICE OF PRESERVATIVE AND METHOD ofchemical analysis. The weight,ofthe sample shall OF TREATMENT be about 100gfor every 100kg ofbamboo treated. 5.1 The choice of preservative and the method of 6.2 The sample obtained as in6.-1shall be powered treatment depend upon the use to which the treated eitherbyhandtileorbymeansofasuitable powdering material isput. machine orconverted into small chips (about 10mm long, 2 mm wide and 1mm thick) by using a knife. 5.2 The recommended practice with regard to The powder or chips thus prepared shall be preservative, their concentration, requisite thoroughly mixed and a liquid of 10 to 20 g taken absorption and method of treatment of bamboo are for chemical analysis. given inTable 1. 7 TESTING OF PRESERVATIVE IN TREATED 6 SAMPLES MATERIAL 6.1 Representative samples for test of preservative Testing of preservative in treated material shall be shall be cut from the treated bamboos for purpose carried out inaccordance with 1S1902. Table 1Recommended Preservatives, Their Concentration and Absorption and the Method ofTreatment of Bamboo for Structural Purposes (Clause 5.2) S1No. Structural Usesof Recommended Concentration Absorption MethodofTreatment Bamboo Preservatives of of (see3) Preservatives Preservatives percent kg/m3 (1) (2) (3) (4) (5) (6) i) Posts,polefencing.etc, exposed to weather and in contact with ground: a) Dry bamboo a — 80-128 Hotandcold, vacuum/Pressure process ,,,, b 6-8 8-12 Vacuum/Pressure process cand d 8-10 1O-I4 Vacuum/Pressurperocess b) Green bamboo b 8-10 8-12 Diffusion, Boucherie process cand d 8-10 10-14 ModifiedBoucherieprocess, Butt end treatment ii) Scaffoldings, ladders, bridges. etc, exposed to weather but not in contact with ground: a) Dry bamboo a — 48-80 Hotandcold, vacuum/pressure process b 5 5-8 Vacuum/Pressure process cand d 6-8 6-10 Vacuum/Pressure process b) Green bamboo Mc@tied Boucherie process for b 6-8 5-8 6h and diffusion process for cand d 6-8 6-10 } 20-25 days, FFP process iii) Housing, building. walls, rafters, trusses, purlins, etc. under cover: a) Dry bamboo a 48-80 Hot dipping, hot and cold. vacuum/pressure process cand d 5 6 Steeping, hotandcold, vacuum/ pressure process e 4 5 Steeping, hotandcold,vacuum/ pressure process 2 1S9096:2006 Table 1(concluded) S1 No. Structural Usesof Recommended Concentration Absorption MethodofTreatment Barnboo Preservatives of of (see3) Preservatives Preservatives > percent k#m3 (1) (2) (3) (4) (5) (6) 5 percent as 0.4 as Cu Dipping, brushing copper (for Copper Napthanate/ f Abietates) 6 percent as 0.6 as Zn Dipping, brushing Zinc (for Zinc Naptha ntite/ Abietates) b) Green bamboo c,d and e 5 5-6 Diffusion process, Moditled Boucherie process, FFPprocess iv) Ceiling, door and door panelling: a) Dry bamboo C, d 3 4 Steeping, hotand-cold.vacuum/ pressure process e 4 5 Steeping, hotandcold.vacuum/ pressure process 4 percent as 0.4.as Cu Dipping, brushing copper (for Copper Napthanate/ f Abietates) 5 percent as 0.6 as Zn Dipping, brusbing Zinc (for Zinc ,> Naptha nate/ Abietates) b) Green bamboo c, d, e 5 4 Diffusion process, Boucheric process, FFP process 3 ---!/. \ ‘Bureau ofIndian Standards BIS is a statutory institution established under the Bureau OJIndian Standards Act, 1986 to promote harmonious development ofthe activities of standardization, marking and quality certification of goods and attending to connected matters in the country. 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