久久精品中出人妻一区二区_午夜视频网站亚洲国产_国产三级在线观看高清_天天看片2017亚洲欧美在线_日韩av无码不卡_亚洲国产高清免费不卡_精品午夜福利在线看_电影天堂青青青手机频_2020人妻中文字幕_影音先锋aⅴ男人资源先锋影院

NFPA 252 Fire Tests of Door Assemblies

Article
 
NFPA 252  Fire Tests of Door Assemblies-Standard
NFPA 252  Standard Methods of Fire Tests of Door Assemblies

NFPA 252  Fire Tests of Door Assemblies-Scope
This standard prescribes standardized fire and hose stream test procedures that apply to fire door assemblies intended to be used to retard the spread of fire through door openings in fire-resistive walls. 

The purpose of this standard is to prescribe specific fire and hose stream test procedures for fire door assemblies in order to standardize a method for determining the degree of fire protection provided by such assemblies in retarding the spread of fire (flame, heat, and hot gases) through door open- ings in fire-resistive walls The degree of fire protection measured in units of time is not an absolute value because all possible actual fire scenar ios are not represented by the standard fire exposure described herein This standard allows different fire door assemblies to be pared with each other in order to evaluate their relative performance as measured against a standard fire exposure.

NFPA 252  Fire Tests of Door Assemblies- Relative Standard
EN1634-1: Fire resistance tests for door and shutter assemblies —Part 1: Fire doors & shutters
 
----------------------------------------------------------------------------------------------------------------------
[ Add to Favorites ]  [ Print this page ]  [ Close the window ]  [ Back to top ]
Copyright EcoSafene  閩ICP備09009213號-1