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Fire frame back thickness is: Minimum 80MM up to any sizes on request.
The steel frame is made of galvanized steel which is rust free.
The minimum steel thickness is 1.0mm, the frame is including 3 hinges (4"x4"x3mm) with hinge reinforcement plates and fire seal around the frame.
We prepare lock box and lock hole for you.
There is a temporary bottom rail for installing on the site.
The frame has left and right on request.
The frame is KD packing, so gain more space and save your money for shipping.
We could also provide prehang doors or assembling packing.
http://www.gtsteeldoor.com/