Section 183(a) in The Delhi Building And Other Construction Workers (Regulation Of Employment And Conditions Of Service) Rules, 2002
(a)the safety of building workers employed for the erection or dismantling of steel structures and pre-fabricated structures is ensured from danger by using appropriate means such as the following, namely:-(i)ladder, gangways or fixed platforms;(ii)platforms, buckets, boatswain's chair or other appropriate means suspended from lifting appliances;(iii)safety harness, life lines, catch nets or catch platform;(iv)power-operated mobile working platforms;