An automatic flush bolt can fail to engage even when a pair of doors looks closed. The bolt may stop short of its strike, hit the rim, or stay retracted because the active leaf never reached the actuator. These faults can look similar from the corridor, but each calls for a different check.
READ MOREConcealed hinge load capacity depends on the door's dimensions and hinge layout as well as its weight. Two doors can weigh exactly the same, yet the wider leaf can exceed the chart value for the same hinge set.
READ MOREPanic bar mounting height is measured from the finished floor on the side where people push the bar to exit. During installation, the slab may still be exposed, even though the drawings use the completed floor level.
READ MOREYes, door hardware can be replaced on an existing fire door assembly, provided the replacement is suitable for the opening and the work follows applicable listing conditions, installation instructions and adopted code requirements. A product that fits the existing holes is not necessarily an accepta
READ MORENFPA 80 calls for a coordinator when the meeting-edge or latching arrangement of a paired fire door requires the inactive leaf to close before the active leaf. This guide explains when a pair can close independently, how coordinators work with closers, astragals, strikes and exit hardware, and how to specify and test the full closing sequence.
READ MOREPositive latching means a fire door closes and secures itself through an approved latch and strike arrangement without a final push. This guide explains latch engagement, closer adjustment, pair sequencing and fire exit hardware, then shows how to identify common failures and verify the complete assembly. Product listings and the adopted NFPA 80 edition determine the details for each opening.
READ MOREA labeled fire door can fail a compliance inspection because of its hardware. The door leaf may be undamaged, yet a misaligned latch, an unsuitable exit device or an unauthorized hinge preparation can affect the opening’s ability to perform as intended.UL Listed Fire Rated Commercial Door Hardware s
READ MORE1 Establish the Occupancy and Opening Requirements“Industrial” is a building description, not a complete code classification. Manufacturing operations may fall within Factory Group F, while warehouses commonly fall within Storage Group S. Hazardous materials can introduce Group H requirements, depen
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