This document summarizes the design of a large span lattice frame roof structure for an industrial building in India. Key points include: - The structure is a 60m span by 100m length roof for a coal storage shed. - Various structural systems were analyzed using STAAD software to determine the most economical design. - Load combinations considered dead load, live load, and wind loads according to Indian standards. - Preliminary member sizing was conducted using a unit loading method, with the governing load combination being 10kN total at nodes from dead and live loads. - Results of the analysis showed minimum moments and shears occurred for a roof slope between 7-9 degrees and a