SOPRAFIX® MBBR Batten Bar (Metal Batten Bar Recessed) is a flat, nominal 1 inch wide AZ55 Galvalume metal bar with 3 inch o.c. pre-punched round holes. MBB is available in 10 feet or special order lengths.
When installing MBBR, center the MBBR down the middle of the mechanically fastened side lap seam of the SOPRAFIX® field membrane ply. The #15 or #14 fasteners are installed in the MBBR pre-punched holes according to the applicable fastening pattern.