Standards & Publications

Browse & Buy UL Standards
Standard 1479, Edition 4

Standard for Fire Tests of Penetration Firestops

UL Bulletin
Standard 1479, Edition 4 Edition Date: March 10, 2016 $398.00-$497.00
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.

Back to Standard 1479, Edition 4

The cost to purchase this Standard varies depending on whether you are ordering a hardcopy, PDF or combination of the two. We also offer two different types of subscriptions: a one year and a three year.

You will be able to choose your purchase options on the following pages.


You have one or more subscriptions that will expire soon.


You have one or more licenses to assign


Additional information required

To serve you better, please update your account details.

Featured Standards

Recently Published

Coming Soon

UL 48
Electrical Signs
Revision Pages

UL 101
Leakage Current for Utilization Equipment
Revision Pages

UL 260
Dry Pipe and Deluge Valves for Fire-Protection Service
Revision Pages

UL 310
Electrical Quick-Connect Terminals
Revision Pages

UL 343
Pumps for Oil-Burning Appliances
Revision Pages

UL 498
Attachment Plugs and Receptacles
Revision Pages

ULC 704.1
Thermal Insulation, Polyurethane and Polyisocyanurate, Boards, Faced
Revision Pages

UL 726
Oil-Fired Boiler Assemblies
Revision Pages

UL 746A
Polymeric Materials - Short Term Property Evaluations
Revision Pages