Fire Resistance

Fire Resistive Designs with TrusSteel trusses have proven to be key documents in gaining the confidence and specifications of architects, engineers and end users. TrusSteel trusses are classified by Underwriters Laboratories, Inc. as to their fire resistance. The following designs can be downloaded and viewed using Acrobat Reader. If you do not have Reader previously installed, you may download it free by clicking the Acrobat icon at the bottom of this page.

UL Design Number
Click to View Documentation
Product(s) Rating
P525

Restrained Roof/Ceiling
Assembly

1, 1 1/2 & 2 hours

Unrestrained Roof/Ceiling
Assembly

1, 1 1/2 & 2 hours

P526

Restrained Roof/Ceiling
Assembly

1 hour

Unrestrained Roof/Ceiling
Assembly

1 hour
L551

Unrestrained Floor/Ceiling
Assembly

1 hour

Unrestrained Beam

1 hour
G542

Restrained Floor/Ceiling
Assembly

1 hour

Unrestrained Floor/Ceiling
Assembly

1 hour

Unrestrained Beam

1 hour

Specific designs can be obtained from Underwriters Laboratories, Fire Code and Technical Services Division.

ullogoR
getacro
Underwriters Laboratories, Inc.
(UL) is an independent safety testing and certification organization.
UL is not affiliated with Pacific Rim Steel Truss and does
not endorse this Web site.