Standard 1479, Edition 4
UL 1479

Standard for Fire Tests of Penetration Firestops

UL Bulletin Edition 4 Published Date: March 10, 2016 Last Revision: April 18, 2024


Summary of Topics b1479_4_20160310_sum.html

Subject 1479

Bulletin Dated: March 10, 2016


The following topics were discussed at the meeting of the Standards Technical Panel for Fire Tests of Through-Penetration Firestops:

1. Membrane penetrations - both horizontal and vertical - what criteria can we develop to evaluate horizontal membrane penetration firestops?

2. Patching and repair - what permissions and rules can be created?

3. Movement after accelerating aging for dynamic joints - can aging impact movement of a dynamic joint and should long term aging be conducted for dynamic joints?

4. W Rating increase - can we extend this rating to various performance values?

5. Sleeved penetrations - what extensions can be permitted based on limited testing?

6. Membrane penetrations for electrical receptacles - What does it mean if the upper toggle switch box is not included in the test? Limit location in the fire partition?

7. General issue - Families of opening protectives - what characteristics (weight, area, etc.) does a “representative sample” in a test need to have to apply to multiple configurations of a system?

8. UL 1489, Fire Resistant Pipe Protection Systems Carrying Combustible Liquids, currently in Preliminary Review.

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