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FlameBlock® Fire-Rated OSB Sheathing U348

FlameBlock® Fire-Rated OSB Sheathing U348

LP® FlameBlock® Fire-Rated OSB Sheathing is certified to meet fire codecompliance and delivers higher design values than FRT plywood at thesame thickness. LP FlameBlock sheathing has the versatility to be used inType II, III and V construction, and is a listed component in fire-ratedinterior wall assemblies, exterior wall assemblies and roof deck applications.

UL Design No. U348
(1 Hour Wall; Fire-Rated from Inside Only)
  • Commonly used in Type V load-bearing exterior walls
  • Reduces dead load and wall thickness versus common alternatives
  • Better substrate for securely fastening exterior facing
  • Allows fiberglass insulation (less expensive than mineral wool)
  • Exposure 1 Classification; withstands normal exposure to moisture during construction
Autodesk® Seek hosted BIM object, Published by Courtesy BIMobject®
Specification
  • Country:
    United States

    Region:
    North America

    CODE-APPROVED FIRE-RATED STRUCTURAL SHEATHING
    • ICC-certified (ESR-1365)
    • 15-minute thermal barrier protection (UBC 26-2)
    • 30-minute Class A Flame Spread Rating (ASTM E84, UL723)
    • Combination of flame-spread resistance and burn-through resistance
    • Code-compliant component of fire-rated interior and exterior wall assemblies and roof decks
    DESIGN FLEXIBILITY
    Because structural design values for LP FlameBlock sheathing are not reduced by the fire-retardant treatment, the panel carries load/span and shear design values equivalent to an untreated wood structural panel in the same panel thickness category. Using LP FlameBlock sheathing in fire-rated wall assemblies can provide more flexibility in design of wall openings as well as more options in framing and bracing to meet structural requirements.

    STRENGTH
    Carries design values for load/span and shear that are superior to fire-retardant treated wood structural panels of the same thickness.

    WEATHER RESISTANCE
    Exposure 1 classification certifies that LP FlameBlock sheathing is able to withstand exposure to moisture during normal construction delays. FRT plywood does not carry Exposure 1 certification.
Technical specification
  • Unique ref.FlameBlock_Fire_Rated_OSB_Sheathing_U348
  • Product familyBuilding materials
  • Product groupOSB boards
  • TypeObject (single object)
  • Date of publishing2014-04-01
  • Edition number1
Related
  • Material mainWood
  • Designed inUnited States
  • Manufactured inUnited States
Classification
  • BIMobject CategoryConstruction Materials - Other
  • UNSPSC nameWallboard
  • UNSPSC code30161501
  • Uniclass 2015 CodePr_25_71_97_60
  • Uniclass 2015 DescriptionParticleboards
  • CSI MasterFormat 2014 Code07 42 43
  • CSI MasterFormat 2014 TitleComposite Wall Panels
  • OmniClass Number23-15 13 19 17
  • OmniClass TitleComposite Wall Panels
  • CSI UniFormat II CodeD40
  • CSI UniFormat II TitleFIRE PROTECTION

Region availability

South America North America
Brazil
United States
Chile