This document presents the design of a large span lattice frame roof structure for an industrial building in India. It analyzes different configurations and member sizes for roof spans ranging from 30 to 60 meters under various load combinations, including dead load, live load, and wind load. Tables of results show bending moments and shear forces in the roof members for different roof slopes and column heights under a unit loading of 10 kN. The 60 meter span design case study is for a coal storage shed with a sloped lattice frame roof supported by columns. STAAD analysis software was used to optimize the structural system and select the most economical design.