This standard outlines the specifications for bamboo supports utilized in concealing military apparatus, detailing requirements for materials, dimensions, workmanship, allowed imperfections, and preservation techniques. It mainly serves manufacturers and procurement bodies involved with defense applications, ensuring the bamboo supports meet quality and durability standards essential for effective camouflage.
Overview
This standard outlines the specifications for bamboo supports utilized in concealing military apparatus, detailing requirements for materials, dimensions, workmanship, allowed imperfections, and preservation techniques. It mainly serves manufacturers and procurement bodies involved with defense applications, ensuring the bamboo supports meet quality and durability standards essential for effective camouflage.
Audience
Contents
Structure
Frequently Asked
The standard defines two primary sizes for bamboo supports used in camouflage: a large size with a length of 1830 ± 10 mm and a diameter of 32 + 6 mm, and a small size measuring 915 ± 10 mm in length and 25 + 6 mm in diameter. The internal cavity must not exceed 8.5 times the diameter for large supports and 6 times for small ones, ensuring structural strength and reliability.
Any bamboo species can be utilized provided the material is mature, sound, reasonably straight, and adequately seasoned. The bamboo must be free from holes caused by 'Ghoon' insects, rot, collapse, splits, significant cracks, transverse cuts, excessive charring, or other defects that could impair its usefulness, except for those allowances explicitly stated in the standard.
Bamboo supports should be thoroughly cleaned, ensuring all metal parts are free from rust and contaminants before treatment. Preservation involves complete immersion in creosote oil (Type II as per IS 218-1961) either by soaking at room temperature for a minimum of 18 hours or by immersing in hot creosote oil (~90°C) for 30 minutes followed by a 30-minute soak in room temperature creosote. Metal components receive additional treatment with corrosion preventive fluids afterward.
Permissible imperfections include natural defects such as dead skin and water marks limited to four internodes with a maximum depth of 3 mm. Biological defects like Xylocopa holes are restricted to one hole per support, and Estigmina attacks must not exceed 3 mm in depth. Manufacturing defects, including knife cuts, rasping, and chipping, are allowed only up to a depth of 3 mm, maintaining the overall structural integrity.
Metal components should be fabricated from mild steel wire with diameters between 3.2 and 4 mm appropriate to the bamboo size. Welding must be clean and continuous, with metal parts free from burrs, sharp edges, or cracks. Wire loops and rivet ends need smooth finishing. For assembly, small slots are cut into the bamboo to fit wire 'V' ends, secured with metal bands. The bamboo surface for metal fitting should be rasped no deeper than 1 mm and treated with undiluted creosote oil to protect it.
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