supply of aluminium single ladder 9.14 meter (30 feet with hook on top) long without joint aluminium ladder made out of high tensile aluminium alloy c section as per is 773/1983 of size: 66.6mm x 31.8mm thickness of section 4mm with step 25.4mm dia aluminium non slippery corrugated pipe at 10 center double riveted to channel to ensure maximum safety steps must be strong enough to support at a time weight of 2 men (140 kg) with warranty as per is 4571/1977 & rubber shoes to be fitted on both ends.aluminium single ladder 9.14 meter (30 feet with hook on top) long without joint aluminium ladder made out of high tensile aluminium alloy c section as per is 773/1983 of size: 66.6mm x 31.8mm thickness of section 4mm with step 25.4mm dia aluminium non slippery corrugated pipe at 10 center double riveted to channel to ensure maximum safety steps must be strong enough to support at a time weight of 2 men (140 kg) with warranty as per is 4571/1977 & rubber shoes to be fitted on both ends.,aluminium single ladder 9.14 meter (30 feet with hook on top) long without joint aluminium ladder made out of high tensile aluminium alloy c section as per is 773/1983 of size: 66.6mm x 31.8mm th ickness of section 4mm with step 25.4mm dia aluminium non slippery corrugated pipe at 10 center double riveted to channel to ensure maximum safety steps must be strong enough to support at a time weight of 2 men (140 kg) with warranty as per is 4571/1977 & rubber shoes to be fitted on both ends. [ warranty per iod: 30 months after the date of delivery ] ]