To install listed smoke stop assemblies on the three elevators opening into the first floor lobby's. One on the North end elevator (smoke door) by the exterior stair enclosure entry and two (Smoke Guard Systems) on the elevators located within the West side main entrance lobby, required because of the I1.1 Occupancy located on the fourth floor which negates the "B" office occupancy exception allowing main floor doors opening into a one-hour rated, fully sprinkled lobby, to not have smoke protection. Units to be installed per manufactured approved listed instructions and Structural and Fire Departments field inspectors review and approval. Maintain fire-resistive rating of shafts and corridor areas with approved fire stop systems. All per approved plans. Separate electrical permit & approval required. NOTE: Building is fully fire sprinkled.Have manufacture's approved listing and installation specifications on site for review and use by electrical, structural & fire inspectors for final approval. A letter of completion is required as evidence of inspections, finals and conformance with approved plans & attachments. drs