Hollow metal door frames.
Commercial door frame types.
Aluminum assemblies can usually only be fire rated up to one hour which may not meet some building codes.
At the base of the frame a spreader bar is welded in.
F 18 1mm f 16 1 3mm f 14 1 7mm f 12 2 5mm fs 16 1 3mm fn 18 1mm fn 16 1 3mm fn 14 1 7mm fe 16 1 3mm fe 17 1 7mm mu 18 1mm mu 16 1 3mm.
This frame arrives assembled squared welded at miters and ground smooth.
Hollow metal door frames are a heavy duty steel frame that can be provided as a knocked down or welded assembly.
3 piece knocked down wraps wall.
Hollow metal frame types.
Knocked down masonry frame.
Some door frames have a reinforcing steel overlay which prevents this from happening but other materials such as upvc fibreglass and aluminium or even a composite blend of wood and resin will all achieve similar effects and make the door frame more reliable.
While other commercial doors are installed in steel frames these doors are installed in aluminum frames which have a slightly different profile than other units.