What is UL 1709?

A UL1709 fire is a rapid rise fire that reaches 2000F within the first 5 minutes of the fire exposure test. 1.3 The test method also covers a small-scale fire exposure, intended to evaluate the ability of protective materials to withstand a variety of environmental conditions anticipated.

Does steel have a UL rating?

Fireproofing steel: A guide to fire resistance ratings. Fireproofing steel is all about time. There are many standard test specifications on which fire resistance is measured. Chances are, though, if you’re dealing with steel, you’ll need to meet ASTM E119, NFPA 251, UL 263 or ISO 834 standards.

What is ul263?

1 Scope. 1.1 These fire tests are applicable to assemblies of masonry units and to composite assemblies of structural materials for buildings, including bearing and other walls and partitions, columns, girders, beams, slabs, and composite slab and beam assemblies for floors and roofs.

Does steel plate have a fire rating?

The steel plates are protected with 0.047” intumescent coating to provide 1-hour fire-resistance, equivalent intumescent application to the tested UL assembly. Therefore, the proposed design for the steel plates coated with intumescent paint will exceed the minimum 1- hour fire-resistance as required per the OSSC.

What provides maximum fire protection for structural steel?

The most widely used fire protection materials for structural steel are mineral fiber and other cementitious materials that are sprayed directly onto the contours of beams, columns, girders, and floor/roof decks.

What is UL 1709 fire testing?

UL 1709, Rapid Rise Fire Test of Protection Materials for Structural Steel, was first published in 1989. The standard was originally developed to provide fire testing requirements suitable for materials exposed to the rapidly rising high temperatures typically observed in high intensity, hydrocarbon- based fires.

What is the UL 1709 TC curve?

UL 1709 – 4 th ed. (1 st ed. 1989) Models wood fueled fire Models oil fueled fire T-t Curve – 1000°F at 5 min T-t Curve – 2000°F at 5 min Columns, Walls, Floors, Roofs, Beams Columns Only No calibration requirements Calibration required Optional environmental exposures Mandatory environmental exposures Same TC layout

What is the difference between ASTM E-119 and UL 1709?

Since the UL 1709 test is more appropriate for hydrocarbon fire exposures, rating from the ASTM E-119 and UL 1709 tests needed to be correlated. To this end GAP Services participated in a three-part research program. The first part involved testing of traditional concrete materials in both ASTM E-119 and UL 1709.

What is UL 1709 and why is it important?

In order for UL 1709 to remain relevant to the needs of the petrochemical industry and continue to adequately address known safety risks, UL is currently revising UL 1709 and, in addition, has produced a more holistic certification category for the fire resistance of structural steel against hydrocarbon fires.