As stated in IBC 2015 Section 703.2, fire-resistance ratings are
established for building elements, components or assemblies by
using the test procedures specified in ASTM E 119 or UL 263, which
are essentially equivalent. This code section also includes the
following three requirements, which will be discussed in detail later:
1. Section 703.3 and the methods listed within it may be used
as an alternate means for determining fire resistance.
2. When incorporating materials, systems or devices that were
not tested as a part of the fire-resistance-rated assembly,
sufficient data must be made available to the building official to
show the required fire-resistance rating has not been reduced.
3. Materials and methods used to protect joints and penetrations
shall not reduce the fire-resistance rating of an element,
component or assembly.
15