Fire-Rated Wall Assemblies
LP® FlameBlock® Fire-Rated OSB Sheathing is a component of the following code-compliant fire-rated assemblies.
MultiFamily
Single Family
Exterior Wall Assemblies
UL Design No. 349
UL Design No. W408
UL Design No. V337
UL Design No. V340
Intertek Listing LPB/WPPS-60-01
UL Design No. U348
Interior Wall Assemblies
UL Design No. 350 (Type A)
UL Design No. 350 (Type B)
Roof Deck Application
Roof Deck
UL Design No. 349
(2-Hour Wall; fire-rated from inside)
About the Assembly
- Commonly used in Type III load-bearing exterior walls
- Reduces dead load and wall thickness versus common alternatives
- Eliminating a layer of gypsum reduces construction time and labor costs
- Provides solid substrate for securely fastening exterior facing
- Allows fiberglass insulation (less expensive than mineral wool)
Installation Documents
Document Name
Description
Download
1-Hour Exterior Wall Assembly - UL Design No. U348
Rated From One Side
1-Hour Wall Assembly - Interek Design No. LPB WPPS 60-01
Rated From Both Sides
2-Hour Exterior Wall Assembly - UL Design No. U349
Rated From Inside Only
2-Hour Exterior Wall Assembly - UL Design No. V337
Rated From Both Sides
2-Hour Exterior Wall Assembly - UL Design No. W408
Rated From Inside and Outside
2-Hour Interior Wall Assembly - UL Design No. U350
Rated From Both Sides
1-Hour Exterior Wall Assembly - UL Design No. V340
Rated From Both Sides