supply of aluminum laddersaluminum ladders,aluminium ladder 08 feet height with hook on top. the stiles of the ladder should be mad e of alu-cross sections size 66.6x31.7x4 mm while the steps made of heavy duty aluminum fluted pipe dia 01 inch corrugated non-slippery are fitted at 12 inches [300mm] interval. the top and bottom end ar e fitted with rubber. steps must be strong enough to support at a time weight of 02 men (140 kg total) with warranty as per is 4571/1977 or latest. make/brand: skyward, sumer, sj, barsat, beatfire or similar [ warranty period: 30 months after the date of delivery ] ] , magic pole ladder 8 feet made out of aluminium side section minimum of size 66.6mm x 3 mm thick with step made of minimum 25.4 mm dia fluted pipe with rubber shoes both ends. make: s umer or similar [ warranty period: 30 months after the date of delivery ] ] , mobile aluminium ladder 36 feet sides of aluminium [shape channel 75x35x3.5 mm (and upper corner thickness 6.5mm) step : aluminium 26 mm square corrugated tube as per is:733-1983 temper t-6, fitted with safety lock, pulley and rope. closed height : 20 feet extended ; 36 feet ladder will be in two fold . make :- sumer / s.j. laders or similar. [ warr anty period: 30 months after the date of delivery ] ] , aluminum straight ladder height 8mtrs with hook on top. 1.aluminum straight ladder wit h hook made of al. section (c- 66.67x31.75x3.18mm) with phase corrugated pipe diameter, 25.4mm dis tance of phase 305mm with rubber shoes on top and bottom. length 8 m (in one piece without joints). ( 1) oem tc gc required. 2.following document submitted by supplier at time of supply of material: - (1) manufacturer material internal / routine test certificate. make: nilkamal, shashank, sumer, skyward, sj king. or similar [ warranty period: 30 months after the date of delivery ] ]