Importance of UL certification program with M-ratings
Testing standards are constantly developing and published to accommodate the needs of the industry and ultimately improve life safety. As is the case when it comes to movement of through penetrations. An installed firestop system subjected to movement prior to fire exposure may not perform as intended in the event of a fire
Vibrations and thermal expansions of pipes, slab deflection, mechanical forces, impact and water hammer are all types of movement that can happen over the lifetime of a building due to situations like blasts, high winds, mechanical systems and floor deflections.
In December 2019, UL published a certification based on the ASTM E-3037 Movement penetration standard. The intent of the certification program is to assess the movement capability of through penetrations such as pipes and cables passing through rated assemblies. In order to certify to these criteria, firestop systems go through a two-direction cycling test, where through-penetrations are tested in both perpendicular and parallel directions to represent movement that can be experienced over the lifetime of a building. This is followed by a fire test. The results quantify the amount of movement firestop systems can accommodate while still performing as intended in the event of a fire.