CR Base Sheet Fastener

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OMG CR Base Sheet Fasteners are one-piece, precision formed from G-90 galvanized steel, coated with CR-10, and pre-assembled with a 2.75-in. diameter galvalume plate.  These fasteners are designed to secure base sheets to poured lightweight insulating concrete.  The 1.2 CR Base Sheet Fastener can also be used on certain poured gypsum decks.

Compatible With:

Multipogo Installation Tool

Features & Benefits

  • Assembled fasteners greatly reduce installation time and labor cost.
  • CR Base Sheet Fasteners are packaged for easy handling on the roof.
  • Fastener “legs” are coated with OMG’s CR-10 corrosion resistant coating which passes the corrosion requirements of FM Approval Standard 4470 and ETAG 006.
  • OMG Assembled CR Base Sheet Fasteners are FM and Miami-Dade County approved.
Physical Data
Ordering Info
Downloads & Videos


Surfaces must be dry and resonably smooth prior to roofing.  For best performance, the fastener must always be installed perpendicular to the substrate.

CR 1.2 BSF - Designed for use on minimum 1.25-in. thick poured lightweight insulating concrete and some gypsum decks.  A pull test is required to determine suitability.

CR 1.75 BSF - Designed for use on minimum 2-in. thick poured lightweight insulating concrete decks only.  Not to be used on poured gypsum decks.

OMG Assembled CR Base Sheet Fasteners are FM approved and rated 1-150 with certain fastener, base sheet, and insulating concrete combinations.  Consult the roofing system manufacturer for specific wind ratings.

NOTE: Prior to job start, contact roof cover manufacturer to determined the correct nailing pattern.  On re-roofing applications, roof should be inspected and tested to determine pullout values.

Physical Data

Head Diameter: 1.125-in. x 1-in. (28.575mm x 25.4mm)
Plate Material: 2.75" diameter Galvalume

Ordering Information

SKU Fastener Lengths Packaging Weight
CRBSA120 1.20" 1000 37lb
CRBSA134 1.75" 500 21lb
MULTIPOGO 39.5" 1 25lb

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