29 Gauge Sheet Metal Fire Rating

V421 which pro vides 1 and 2 hour fire resistance ratings for exteri or walls in metal buildings.

29 gauge sheet metal fire rating.

A 29 gauge metal panel can have the same impact resistance rating from underwriters laboratory ul as a 26 gauge panel. The gauge of a metal roof refers to its thickness and the higher the gauge the thinner the metal. Sheet metal gauge size chart gauge or gage sizes are numbers that indicate the thickness of a piece of sheet metal with a higher number referring to a thinner sheet. Asce sfpe 29 99 standard calculation methods for structural fire protection structural engineering institute of the american society of civil engineers reston va 1998.

Fire resistance classifications the 2012 and 2015 ibc in section 1505 of chapter 15 states that fire classification of roof assemblies is based on two tests astm e108 and ul 790 that are. If you are unfamiliar with ul fire resistance ratings begin with a review of meeting code requirements pg. The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material. The advantage of thicker metal panels in this case is that they are less prone to denting.

The ratings are for unsymmetrical walls that require ratings from both sides. Fire resistance ratings for proprietary designs could be found in special directories published by respective testing laboratories e g. As explained there these ratings are applied to certain types of roof ceiling and floor ceiling construction assemblies which are tested and assigned hourly ratings mandated by building codes or other building safety requirements. The mbma fire tests of exterior walls in 1997 resulted in a new uldesign no.

For example standard 29 gauge steel roofing made in long panels is about 0 36 millimeters thick and the 26 gauge version is slightly thicker at 0 48 millimeters. Metal roof systems are required to be fire classified because of the concern about the combustibility of the materials under the metal panels. When 28 gauge steel deck is used the restrained assembly rating 1 1 2 hr.