Bamboo Mat Corrugated Sheets -Specification
2004 Edition

The standard specifies sheets in lengths of 1800, 2140, and 2440 mm with a width of 1050 mm. Thickness is nominally 3.8 mm with a tolerance of ±10%. Corrugation depth is set at 30 mm with a permissible +2 mm / -0 mm deviation, and the pitch of corrugation is 120 mm with a tolerance of ±2 mm measured over six pitches. Thickness measurements are averages of six random points excluding valleys, while depth and pitch are measured using appropriate gauges and over defined corrugation counts.

Phenolic resin of BWP grade conforming to IS 848 is recommended for bonding bamboo mats, ensuring water resistance and strong adhesion. Bamboo mats are soaked in this resin, and a second coat consisting of phenolic resin mixed with an appropriate filler is applied on outer layers to enhance surface characteristics. Although the standard does not explicitly prescribe preservatives, industry practice includes using compatible preservatives to protect against fungal and insect damage during production.

IS 15476 does not detail a specific fire resistance test for bamboo mat corrugated sheets. Generally, fire performance is evaluated following related standards such as IS 3809 for fire resistance of building materials or IS 15061 for fire-retardant treatments. Testing involves exposing specimens to flame or radiant heat while monitoring parameters like flame spread and smoke generation. For certification, manufacturers typically obtain third-party fire performance assessments from accredited laboratories compliant with recognized fire testing protocols.

To qualify for Eco-Mark certification, BMCS must comply with all relevant environmental clauses in the standard, including sourcing bamboo from outside natural forests. Manufacturers must secure environmental clearance from the State Pollution Control Board as per applicable water, air, and environmental protection legislation and adhere to forest department regulations. Documentation such as certificates or declarations must be submitted to BIS during the Eco-Mark application. Moreover, sheets should be treated with light organic solvent preservatives like zinc or copper naphthenate to prevent fungal growth, and the product must bear the combined ISI and Eco-Mark logos.

Sampling is conducted randomly following IS 4905 procedures, with sample sizes dependent on lot size as specified in Table 3 of the standard. Dimensional compliance is verified first; if met, further testing is performed on samples sized accordingly. Acceptance is based on defect counts not exceeding permissible limits listed in the standard. This systematic approach ensures statistically valid lot acceptance, confirming that sheets meet dimensional and performance requirements set forth in the standard.