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.
Commercial door frame types.
Commercial metal door frames hollow metal door frames timely prefinished steel frames and interior aluminum door frames are among the most common types of commercial door frames.
Hollow metal frame types.
Knocked down masonry frame.
Knocked down drywall 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.
This frame does not arrive assembled three pieces 2 jambs and head welded masonry frame.
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.
Hollow metal door frames.
3 piece knocked down wraps wall.