توضیحات :
NFPA 255 – Standard Method of Test of Surface Burning Characteristics of Building Materials
۲۰۰۶ Edition
Chapter 1 Administration
۱-۱ Scope.
۱-۱-۱ This standard describes a method of testing the comparative surface burning characteristics of building materials with regard to flame spread and smoke developed.
۱-۱-۲ This test method is applicable to any type of building material that by its own structural quality or the manner in which it is applied is capable of supporting itself in position, or is supported in the test furnace, in the thickness recommended for use.
۱-۲ Purpose.
۱-۲-۱ The purpose of the test is to determine the comparative surface burning characteristics of the material under test by evaluating the flame spread over its surface and the resulting visible smoke, when exposed to a test fire, thus establishing a basis on which surface burning characteristics of different materials can be compared without specific consideration of all end-use parameters that might affect the surface burning characteristics.
۱-۲-۲* In this test method, flame spread and visible smoke information is recorded and used to assess a flame spread index and a smoke developed index.
۱-۲-۳* This test method shall not be used to evaluate the fire resistance of materials or assemblies.
<< ادامه مطلب را در فایل پیوست مطالعه فرمایید >>
