The client does not want to pay to have each door wired. He was thinking of a photo beam going across the doors. I see some issues with that. First, when I walked the building, there was stuff in the way such as pallets, a forklift etc. The client said that would all be moved at the end of each day. There is also some concern regarding damage from forklifts etc. The last concern is once employees learn how the photo beam works, it will be common knowledge that they can just step over the beam.
My thought is to place motions on the walls every 30' facing into the warehouse.
The platform will be DSC NEO with wireless motions and contacts. We will probably use their host transceiver with a repeater at the end of the building.The building is roughly 315' wide. The widest area between offices/structures 85'. The area with the OH doors is the front wall and contains all the OH doors, offices, man doors etc. The ends have no openings, and the opposite wall has 2 single man doors for fire exit.