fire-rated door

fire-door rating

A fire-endurance rating for doors, shutters, etc., established by the Underwriters’ Laboratories, Inc., or other recognized and approved laboratory: class A: 3 hr; for doorways or other openings through a wall separating buildings or dividing a single building into fire areas; class B: 1 or 1½ hr; for doorways or other openings in enclosures of vertical transportation through buildings (stairs, elevators, etc.); class C: 3/4 hr; doors in corridor and room partitions; class D: 1½ hr; doors and shutters in exterior walls which are subject to severe fire exposure from outside the building; classes E and F: 3/4 hr; doors, shutters, or windows in exterior walls which are subject to moderate or light fire exposure respectively from outside the building.

单词	fire-rated door
释义	fire-rated door fire-door rating A fire-endurance rating for doors, shutters, etc., established by the Underwriters’ Laboratories, Inc., or other recognized and approved laboratory: class A: 3 hr; for doorways or other openings through a wall separating buildings or dividing a single building into fire areas; class B: 1 or 1½ hr; for doorways or other openings in enclosures of vertical transportation through buildings (stairs, elevators, etc.); class C: 3/4 hr; doors in corridor and room partitions; class D: 1½ hr; doors and shutters in exterior walls which are subject to severe fire exposure from outside the building; classes E and F: 3/4 hr; doors, shutters, or windows in exterior walls which are subject to moderate or light fire exposure respectively from outside the building.
随便看	entantomer entapp en-tappuah entarian enterprise systems management entaro adun entases entasia entasis entassment entastic entatic entb entc entcs entcss entdecken sie algarve entdifferenzierung ent (disambiguation) ent doctor ente ente acquedotti siciliani ente autonomo acquedotto pugliese ente autonomo gestione cinema ente autonomo orchestra sinfonica siciliana entebbe