DRAFT U GANDA STANDARD  
  DUS 2114  
First Edition  
2018 -I0-12 
 
 
 Reference number  
DUS 2114 : 2018 
© UNBS 2018   
  
 
Preservation of Bamboo for Structural P urposes -Code of 
Practices   
  DUS 2114 :2018  
ii © UNBS 2018  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2018   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
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permission from UNBS.  
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The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 2114 :2018  
© UNBS 2018  – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 scope  ................................ ................................ ................................ ................................ ................................  1 
2 Normative References ................................ ................................ ................................ ...........................  1 
3 Recommended Preservatives  ................................ ................................ ................................ ........................  1 
4 Methods of Treatment  ................................ ................................ ................................ ................................ ..... 2 
4.1 Traditional Treatment Methods  ................................ ................................ ................................ ...................  2 
4.1.1 Leaching  ................................ ................................ ................................ ................................ .....................  2 
4.1.2. Smoking  ................................ ................................ ................................ ................................ ....................  2 
4.1.3. Lime washing  ................................ ................................ ................................ ................................ ............  2 
4.1.4. Baking  ................................ ................................ ................................ ................................ ........................  2 
4.1.5. Natural Dyes, Varnishes and Paints  ................................ ................................ ................................ ....... 3 
4.2 Chemical Preservation  ................................ ................................ ................................ ................................ . 3 
4.2.1. Water borne type/water s oluble type  ................................ ................................ ................................ ...... 3 
4.2.2. Oily Preservatives: Creosote  ................................ ................................ ................................ ..................  3 
4.3. Short -Term Chemical Protection  ................................ ................................ ................................ ...............  3 
4.3.1Spraying  ................................ ................................ ................................ ................................ ......................  4 
4.3.2. Brushing  ................................ ................................ ................................ ................................ ....................  4 
4.3.3. Dipping  ................................ ................................ ................................ ................................ ......................  4 
4.4. Long -Term Chemical Protection.  ................................ ................................ ................................ ...............  4 
4.5. Non -Pressure Treatment  ................................ ................................ ................................ ............................  4 
4.5.1 Steeping or Butt End Treatment (Capillary  Rise) Method  ................................ ................................ ..... 4 
4.5.2. Soaking/Diffusion  ................................ ................................ ................................ ................................ ..... 4 
4.5.3. Hot and Cold Treatment  ................................ ................................ ................................ ...........................  5 
4.5.4. Sap Replacement Treatment: Modified Boucherie Process  ................................ ................................  5 
4.6. Pressure Treatment  ................................ ................................ ................................ ................................ ..... 5 
4.6.1. Vacuum Process  ................................ ................................ ................................ ................................ ....... 6 
4.6.2. Full cell Process  ................................ ................................ ................................ ................................ ....... 6 
4.6.3. Empty Cell Process  ................................ ................................ ................................ ................................ .. 6 
4.6.4. Fast F luctuating Pressure Process  ................................ ................................ ................................ ........  6 
5 Choice of Preservative and Method of Treatment  ................................ ................................ .......................  6 
6 Samples  ................................ ................................ ................................ ................................ ............................  6 
7 Testing of Preservative in Treated Material  ................................ ................................ ................................ .. 7 
Bibliography  ................................ ................................ ................................ ................................ ......................  10 
 DUS 2114 :2018  
iv © UNBS 2018  – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastata l under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) an d  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the T echnical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 12, furniture  DRAFT UGANDA STANDARD  DUS 2114 :2018  
 
© UNBS 2018  – All rights reserved  1 
 Preservation of B amboo for Structural Purposes — Code of P ractice  
1 scope  
This standard covers types of preservatives and treatment procedures of bamboos used for stru ctural 
purposes like post, scaffoldings, house building, walls, trusses, etc. It also includes recommendations on the 
choice of treatment depending upon the various uses to which the bamboo is put. This standard does not 
cover the treatment of bamboo for n on-structural purposes, which is covered in DUS 2098 . 
 
2 Normative R eferences  
The following referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
DUS 2099 Preservation of timber — Code of practice  
DUS 2 098, Code of practice for preservation of bamboo for  non- structu ral purposes   
 DUS 2112 -1:2018, Water soluble type wood preservative –Part 1; Acid -copper -chrome (ACC) wood 
preservative  
DUS 2112 -2:2018, Water soluble type wood preservative –Part 2; copper -chrome -boron (CCB) wood 
preservative  
US 324, Copper -chrome -arsen ic (CCA) wood preservative  
US 323, Specification for creosote oil for use as wood preservatives   
3 Recommended P reservatives  
The following are the various preservatives  recommended for treatment of bamboos    
 
a) Coal Tar Creosote  
This is a fraction of coa l tar distillate with a boiling point range above 200oC and is widely used admixed with 
fuel oil. A creosote fuel oil mixture in the ratio of 50:50 is found suitable. The fuel oils ensure stability to 
creosote against evaporation and bleeding from the trea ted bamboo. The creosote used shall conform to IS 
218. 
 
b) Copper -Chrome -Arsenic Composition  
A typical composition of this preservative comprises of copper sulphate (CuSO 4.5H 2O), arsenic pentoxide 
(Na 2 Cr2O.2H 2O) and sodium or potassium dichromate (Na 2Cr2O, .2H 2O or K 2Cr2O 2H 2O) in proportion of 3: I : 
4; conforming to US/EAS 324  
 
c) Acid - Curpric -Chromate Composition  
A typical composition of this preservative comprises of 1.68 parts chromic acid (Cr 2O3 (equivalent to 2.5 parts 
of sodium bichromate), 50 pa rts of copper sulphate (CuSO 4.5H 2O) and 47.5 parts of sodium bichromate (Na 2 
Cr2O.2H 2O); conforming to DUS 2112 -1:2018  
 
 
  
2 © UNBS  2018  – All rights reserved  
 d) Copper -Chrome -Boron Composition  
A typical composition of the preservative comprises of boric acid (H3BOJ, copper sulphate (CuS04.5H 2O) and 
sodium or potassium bichromate (Na 2 Cr2O, .2H 2O or K 2 Cr2 O ,.2H 2O) in the proportion of 3:1:5 conforming to 
DUS 2112 -2:2018  
 
e) Boric -Acid and Borax  
This has been used successfully against Iyctus borers. A mixture in ratio of 1: 1.5 is found more  suitable . 
 
f) Copper -Zinc-Naphthenate/A bietate s 
 
These are copper and zinc salts of naphthenic/abietic acid.  
4 Methods of T reatment  
Treatment methods can be divided into traditional/time tested methods and chemical methods.  Selection of 
the treatment meth od depends on many factors:  
 State of bamboo - green or dry  
 Form - round bamboo, splits or bamboo products.  
 End applications - in ground contact, exposed to atmosphere,  
 Undercover, structural/non -structural.  
 Scale - quantity to be treated and time available . 
 Potential causes of decay - biotic (fungus/insects) and abiotic  (Cracks/weathering  
 
4.1 Traditional Treatment Methods  
These are age -old methods which have been practiced in areas where bamboo commonly grows. They are 
simple and cost -effective without the  use of supporting equipment. But these methods are not appropriate for 
long-term protection of bamboo Leaching, smoking and lime washing are age -old treatment methods which 
have been practised where bamboo is grown and used. Sometimes, for craft items, pr otection is also given by 
use of natural dyes and lacquers, which also lead to value  addition  
4.1.1 Leaching  
Leaching helps remove starch and also enhances permeability for future treatment by diffusion and pressure. 
Mechanical properties are affected for  up to 2 - 3 months of water storage. This method is appropriate for 
treating any quantity of bamboo. It is also recommended for craft and mat applications where pliability is 
required.  
4.1.2. Smoking  
Traditionally, culms are stored over the hearth or firep lace. The moisture content in smoked culms is thus 
reduced so that biological degradation cannot take place. Built -up deposits from smoke form a protective layer 
on the culm. Smoke drying also reduces splitting  
4.1.3. Lime washing  
Lime or whitewashing is m ainly used for ornamental effect. Culms and mats are painted with slaked lime 
(Ca(OH)) which is then transformed   into calcium carbonate, CaCO , which inhibits water absorption and   
delays fungal attack. Bamboo mats can also be tarred, sprinkled with san d and whitewashed after drying  
4.1.4. Baking  
Baking on open fire has been used to straighten crooked bamboo culms. Bamboo is rotated on an open flame 
to prevent localised heating. The high temperatures destroy the starch and other sugars and also produce t ar 
in the structure. It kills existing infestations if any. Stresses produced during  heating gives dimensional DUS 2114 :2018  
© UNBS 2018  – All rights reserved  3 
 stability to the culm. A lower equilibrium moisture content regime prevents any subsequent fungal attack if 
bamboo is used in interior applicatio n 
4.1.5. Natural Dyes, Varnishes and Paints  
Natural dyes have been used for ages to provide protection and colour to bamboo products. Dyes are applied 
by boiling the material with the colouring agent, during which the starch is also leached out  
Paints and varnishes are applied on to the bamboo surface to protect it from dirt and moisture, and to provide 
ornamental effects. They form a film on the surface of the bamboo. Blistering of the paint/varnish leaves the 
bamboo surface exposed, and fungal and insect attack may follow. It is therefore recommended to provide a 
protective coating of preservative before application of paints and varnishes  
 
4.2 Chemical Preservation  
Use of chemical preservatives with or without the help of special equipment ensures long -term protection. 
Depending upon the method of treatment, chemicals can impart short term or long -term protection  
Preservatives are formulations of single compounds or mixtures which protect wood/bamboo against 
biological degradation and discolouration caused  by biological attacks. With a few exceptions, chemical 
preservatives are toxic. Selection and application has to be done with care to meet performance and 
environment requirements. Depending upon the carrier solvents, preservatives are divided into differ ent 
categories  
 
4.2.1. Water borne type /water soluble type  
Water -soluble salts are dissolved in water. On treatment, the water evaporates leaving the salts inside the 
bamboo. These are further categorized into non -fixing and fixing types.  
4.2.1.1. Non -fixing type preservative  
These are leachable solutions and their use is restricted to bamboo used in dry conditions and under cover. 
Bamboo treated with these preservatives should not be exposed to rain or ground contact. Common example: 
Boric acid: Borax & co pper sulphate  
4.2.1.2. Fixing Type preservatives  
These formulations are proportionate mixtures of different salts which interact with each other in the presence 
of bamboo/wood and become chemically fixed. In principle, the degree of fixation and efficacy d epends upon 
the nature of the components and their combination. For example, Chromium is responsible for fixation, 
copper is effective against decay fungi and soft rot and the third compound acts against insect and fungus  
The process of fixation requires s ome weeks during which the material should be stored under cover. Slow 
fixation is preferred in case of bamboo as it allows diffusion and better distribution of preserving salts. 
Common example: Copper -Chrome -Boron, Arsenic Pentoxide & Boric Acid  
 
4.2.2. O ily Preservatives: Creosote  
Creosote  oil available from coal  tar is a dark brown viscous liquid. Creosote should be used exclusively for 
pressure processes or hot and cold treatment. Being oily, it imparts water repellence to the treated material. It 
is effective against fungal and insect attack. Due to its dark brown colour and bad odour, its use is restricted to 
exterior applications, especially in contact with mud/ ground  
 
4.3. Short -Term Chemical Protection  
This method of chemical treatment used depends  upon whether intermediate protection is required (raw 
material stock) or the material has to be protected over an extended period (finished product).  
Prophylactic treatment is done to prevent immediate attack when the bamboo is stored for a few days or 
during transportation, using mild doses of chemicals. Such treatment is also done to intermediate products like  
4 © UNBS  2018  – All rights reserved  
 slats, slivers and mats which are to be used in the manufacture of  composite products. Treatment methods 
like spraying, brushing and dipping give superficial protection, effective for a short period only  
 
 
4.3.1Spraying  
This method is suitable only for large stacks of bamboo stored under cover in depots.  
1 Stack bamboo horizontally on a raised platform and preferably sloping ground, and on a polythe ne sheet.  
2 For large stacks, use an industrial sprayer. For small stacks, a backpack is sufficient.  
3 Spray chemicals on the top taking special care to cover the ends and the cut surfaces (2% solution of boric 
acid: borax. Mix 1 kg of Boric acid, 1 kg of Borax in 100 litres of water).  
4 Collect the drained solution for reuse  
 
Note  
Always use protection during spraying - masks, gloves, goggles, and others  
Spraying causes environmental pollution - only non -toxic chemicals like boric acid: borax should be use d 
Always collect and reuse drained chemicals.  
Spray in the wind direction  
 
4.3.2. Brushing  
It is suitable for small handicraft and household items. 2 -3 coats of chemicals should be given using a brush. 
The size of the brush will depend on the material surf ace to be covered  
4.3.3. Dipping  
Dipping is used for medium quantities of bamboo/bamboo products. Dipping is more effective than spraying or 
brushing. A momentary dip of 30 seconds to a minute is sufficient to protect the material. The excess material 
shou ld be drained and reused  
4.4. Long -Term Chemical Protection.  
When the material is to be stored for long periods, the preservative needs to penetrate sufficiently to provide 
protection over the extended period. Th e same preservative  can give short -term or l ong-term protection 
depending upon the method of treatment. Long -term protection can be given with or without the use of 
pressure. The method is determined by the moisture content in bamboo, type of preservative and end -use 
4.5. Non -Pressure Treatment  
The methods for non -pressure treatment of bamboo are butt end treatment, soaking, hot and cold treatment, 
and sap replacement. Methods like butt end treatment and diffusion are suitable for green bamboo only. Hot 
and cold treatment requires air -dry bamboo  
4.5.1 Steeping or Butt End Treatment (Capillary Rise) Method  
Green bamboo up to 1.8 m length can be treated by this method. After removing the branches, bamboos are 
made to stand vertically in troughs or drums containing solutions of water borne preservatives.  Bottom end, up 
to 250 mm is kept immersed and any loss of preservative due to up -take or evaporation is made up daily. The 
top end is kept wet by wrapping with wet cotton cloth. Bamboo is inverted after at least 7 days. The 
preservative is sucked by vesse ls and is distributed to neighboring cells by diffusion The time for treatment will 
depend upon the moisture content and length of the culm  
4.5.2. Soaking/Diffusion  
Round bamboo, splits and slivers can be treated by keeping them submerged in water -borne pr eservative 
solution. The preservative moves into the bamboo due to concentration gradient and the cell sap moves out 
due to osmotic pressure. The method of diffusion can be varied by increasing the concentration of 
preservative to reduce treatment time, us ing two salts to increase  fixation and filling the lacuna of the culm DUS 2114 :2018  
© UNBS 2018  – All rights reserved  5 
 with solution by puncturing the nodes to fasten the diffusion process. The process is slow, requiring a large 
number of tanks. It is suitable for treating 50 -100 culms a month  
 
NOTE — The rate of diffusion depends upon the mobility of the ions, The penetration of the ions depends upon the moisture content of 
the green material, its anatomical structure. the mobility of the diffusing ions, the temperature of the solution and the per iod of immersion 
in the treating solution  
 
4.5.3. Hot and Cold Treatment   
It is based on the principle that on heating, air from the cells will expand and partially escape. During cooling a 
slight vacuum is created due to contraction of the residual air and cause s the entry of preservative into the 
cell. Large quantities can be treated at one time  
Note  
Treatment with creosote is most suitable for bamboo used as reinforcement in mud/cement  
Viscosity of preservatives like creosote decreases on heating easing penetr ation.  
Do not use Dichromate containing salts like CCA and CCB as they precipitate on heating  
  
4.5.4. Sap Replacement Treatment: Modified Boucherie Process  
In this method, the preservative is forced under pressure through the entire length of the culm, so  that the sap 
is replaced by the preservative. Up to 5 -6 bamboo culms can be treated at a time. Treatment time for 6 m long 
sections is 3 hrs for interior use and 6 hrs for exterior use  
 
A suitable container is used for keeping the treatment solution, whic h shall be of water -soluble type. The 
container is provided (at the bottom) with side tubes fitted with stop -cocks and rubber tubes to which are 
attached the green bamboos with branches on. [n order to secure leak -proof contact between the rubber 
tubes and  the bamboos, suitable metallic cla mps or other device should be used. The tanks is also fitted with 
a screw cap to which is attached a motor car tyre tube valve (see Fig. 1).  
 
The tank is filled with the treating solution to about two -thirds of the volum e and after tightening the cap, air is 
pumped in through the valve to a pressure of 0.1 to 0.14 N/lmm2 which could be easily measured by using a 
pen-gauge. Under this pressure, the treating liquid forces the sap out of the walls and septa of the bamboos 
through the open end and takes its (sap’s) place in course of time. After a few preliminary experiments, the 
concentration of the treating solution and the period of treatment can be fixed to obtain requisite absorption of 
the preservative. The bamboo is tak en off on the completion of the treatment, Branches of treated bamboo 
also get treated and are therefore required to be disposed off carefully as the same will not degrade naturally 
and are likely to pose hazard due to presence of toxic chemicals. These sh ould preferably be burnt in the 
open and ashes buried underground or be disposed off by any other suitable method.  
 
Note  
• Treated leaves and branches should be burnt in the open and ashes disposed carefully.  
• Only safe preservatives containing Boron shou ld be used.  
• Treatment can also be given without pressure. For this a single culm is treated at a time. Treatment without 
pressure for about 5 m of culm takes 6 -7 days  
4.6. Pressure Treatment  
Pressure methods are suitable for dry bamboo and ensure quick a nd uniform penetration of the preservative 
deep inside. The principle of the process is to force the preservative into the bamboo tissue. This is achieved 
either by evacuation of the air inside the culm, or by increased pressure upon the preservative in a 
pressurized cylinder, or a combination of both  
Treatment under pressure increases the durability of bamboo. Bamboo treated by this method will last for 
about 15 years in ground contact and 50 years for building components. Water -borne preservatives and 
sometime creosote are used for the treatment   
6 © UNBS  2018  – All rights reserved  
 Depending upon the pressure schedule, the four different types of pressure treatment are there and these are 
as follows  
4.6.1. Vacuum Process  
The culm is first evacuated by creating a vacuum to partly remove air wh ich may restrict entry of preservative 
solution due to air bubbles. The solution floods into the cylinder and forces into the culm on release to normal 
pressure. Another cycle of vacuum is repeated to improve penetration and preservative loading  
 
4.6.2. Fu ll cell Process  
This is similar to the vacuum process in the first stage where the culm is evacuated. In the second stage the 
preservative is pumped into the culm under a pressure of 5 -15 bar for some hours. The purpose is to fill the 
cell lumens completel y with preservative solution. At the final stage, a vacuum  
is again created for 10 minutes after draining the preservative and to eliminate bleeding by removing excess 
material  
This schedule is used for treating of bamboo culms to be used for structural ap plications, where high retention 
and penetration has to be ensured. The preservative in cell lumens is subsequently soaked into adjacent 
fibres and parenchyma cells  
 
4.6.3. Empty Cell Process  
This process is used where low retention but complete penetratio n is required. The preservative forms a 
coating on the cells and does not fill the lumen  
Cost of equipment for this method is higher than for full cell pressure and requires more operational skill  
4.6.4. Fast Fluctuating Pressure Process  
Initially a vacuum  is created followed by flooding of preservative at 5 -15 bars. This pressure is maintained for 
a few minutes and then abruptly dropped to atmospheric level. The pressure is again raised and dropped.  
Many such pressure cycles are administered and with each cycle the pressure holding period is reduced. 
Vacuum in the final stage prevent dripping. This method is adopted for green bamboo when the moisture 
content is more than 60%.  
Higher concentration salts (8 -10% CCA or 5 -6% boron salts) are used as the solutio n becomes diluted with 
sap from the culm. Some important points that must be kept in mind for establishment of pressure treatment 
facility  
Since the capacity of pressure treatment plants would be higher than non -pressure processes, there must be 
a steady d emand for treated material. Unless capacity of the facility is fully utilised, cost of treated culms 
would not be economical for most commercial purposes  
The culms have to be dry with about 20% moisture to allow free passage of the preservative  
5 Choice of  Preservative and M ethod  of Treatment  
The choice of preservative and the method of treatment depend upon the use to which the treated material is 
put. The  recommended practice with regard to preservative, their concentration, requisite absorption and 
metho d of treatment of bamboo are given in Table 1.  
6 Samples  
Representative samples for test of preservative shall be cut from the treated bamboos for purpose of chemical 
analysis. The weight, of the sample shall be about 100 g for every 100 kg of bamboo treat ed. 
 
6.1 The sample obtained as in shall be powered either by hand tile or by means of a suitable powdering 
machine or converted into small chips (about 10 mm long, 2 mm wide and 1 mm thick) by using a knife. The DUS 2114 :2018  
© UNBS 2018  – All rights reserved  7 
 powder or chips thus prepared shall be thor oughly mixed and a liquid of 10 to 20 g taken for chemical 
analysis.  
. 
7 Testing of Preservative in T reated  Material  
Testing of preservative in treated material shall be carried out in accordance with DUS 2098 . 
The net absorption of the preservative chemic als in bamboo and cane shall be determined by chemical 
analysis of treated material and shall be compared with the figures obtained from the weight of the material 
before and after treatment, wherever possible. The final sample obtained in 6.2 shall be use d for the analysis  
 
 
 
 
 
 
 
Table 1 Recommended Preservatives, Their Concentration and Absorption and the Method of 
Treatment of Bamboo for Structural Purposes  
No. Structural 
Uses of 
Bamboo  Recommended 
Preservatives  Concentration  of 
Preservatives  
percent   Absorption of  
Preservatives  
 kg/m3  Method of Treatment  
 
i Posts, pole fencing. etc, exposed to weather and in contact with ground:  
a) Dry 
bamboo  a _____  80-128 Hot and cold, vacuum/Pressure  
  b 6-8  8-12 Vacuum/Pressure proc ess 
  c-d  8-10 10-12  Vacuum/Pressure process  
b) Green 
bamboo  b 6-8  8-12 Vacuum/Pressure process  
  c-d  8-10 10-12  Vacuum/Pressure process  
 
8 © UNBS  2018  – All rights reserved  
 ii Scaffoldings, ladders, bridges. etc, exposed to weather but not in contact with ground  
a) Dry 
bamboo  a _____ 48-80 Hot and cold, vacuum/Pressure 
  
process  
  b 5 5-8 Vacuum/Pressure process  
  c-d  6-8  6-10 Vacuum/Pressure process  
b) Green 
bamboo   b 6-8 5-8 Modified Boucherie process for6 
h and diffusion process for 20 -25 
days, FFP process    c-d 6-8 6-10 
iii) Housing, building, walls, rafters, trusses, purlins, etc. under cover:  
a) Dry 
bamboo  a ______  48-80 Hot dipping, hot and cold.  
vacuum/pressure process  
  c-d  5 6 Steeping, hot and cold, vacuum/ 
pressure process  
  e 4 5 Steeping, hot and cold, vacuu m/ 
pressure process  
   5 percent as copper (for 
Copper Napthanate/ 
Abietates)  0.4 as Cu  dipping, brushing  
   6 percent as Zinc (for 
Zinc Naptha ntite/ 
Abietates)  0.6 as Zn  dipping, brushing  
b) Green 
bamboo   c, d & e  5 5-6 diffusion process modified 
Bouc herie process, FFP process.  
iv) Ceiling, door and door paneling : 
a) Dry 
bamboo   C, d 3 4 Steeping, hot and -cold. vacuum/ 
pressure process  
      
 DUS 2114 :2018  
© UNBS 2018  – All rights reserved  9 
  Table 1 continued            
     
No. Structural 
Uses of 
Bamboo  Recommended 
Preservatives  Concentration o f 
Preservatives  
percent   Absorption of  
Preservatives  
 kg/m3  Method of Treatment  
 
 Posts, pole fencing. etc, exposed to weather and in contact with ground:  
  e 4 5 Steeping, hot and -cold. 
vacuum/ pressure process  
   4 percent as copper (for
 Copper Napth anate/
 Abietates)  0.4 as Cu   dipping, brushing  
   5 percent as  Zinc (for 
Zinc Naptha ntite/ 
Abietates)  0.6 as Zn  dipping, brushing  
b) Green bamboo  c, d & e     5 4 diffusion process modified 
Boucherie process, FFP  
 process.  
 
 
 
 
  
10 © UNBS  2018  – All rights reserved  
 Bibliography  
[1] IS 9096, Preservation  of bamboo for structural purposes -Code of practices.     
  
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