Work to include the remove of existing single ply roofing assemblies, coal tar pitch roofing assemblies (with gravel), wood soffits, plaster ceiling, and sheet metal, and modifications to existing roof mounted HVAC and electrical systems and other related items. New work consists of the installation of new TPO roofing assemblies, new roof curbs and equipment supports, gas piping modifications, new gutters, downspouts, roof drains, new electrical wiring and conduit, reinforcement of existing wood roof joists, new gypsum ceiling, and other related ceiling/roof items