Solution ID

131150

Resolution

ND series locks are UL listed for both single and pair of fire doors.

ND series UL listing for single fire doors
ND series lock with ½” throw latchbolt is approved for up to 3 hours on single doors up to 4’-0” x 10’-0”

ND Series UL listing for pair of fire doors
  • ND series Lock with ¾” throw latchbolt is approved for up to 3 hours on pairs of doors up to 8’-0” x 8’-0” 
  • ND series Lock with ¾” throw latchbolt is approved for up to 1-1/2 hours on pairs of doors up to 8’-0” x 10’-0” 



For more iniformation visit UL certification directory here.