The savings of Buttonlock in place of Pittsburgh on Low Pressure Rectangular Duct Lockformer Company Brochure, August 1968 Snaplock Buttonpunch on Rectangular Duct is making a comeback! Even though Snaplock has been a SMACNA standard for the Longitudinal Seam on Low Pressure Duct since 1969, many shops left it behind in favor one method- Pittsburgh-that […]
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Male Pitts: the often neglected other profile in the Pittsburgh Lock The Pittsburgh Lock consists of two profiles: the Female and the Male. Yet the Pittsburgh Machines run only one of those as standard: the Female. For decades the Male Pitts has been offered as an optional set for the outboard side of a 20
Male Pitts: the often neglected other profile in the Pittsburgh Lock Read More »
Cleatbender—Power Slip and Drive duct with Pittsburgh Lock Slip and Drive Duct is the most common method of connecting two assembled rectangular duct sections from end to end, referred to as the transverse connection. Preparing the duct for the Slip (a.k.a. Flat S Lock) , which connects the top and bottom , is much easier
