The Galvanised Chisel Point Staple sizes required to fix PROMATECT-H® boards when upgrading the fire performance of concrete columns or beams are: 30mm long x 10.5mm wide x 1.4mm thick staples for 12mm thick boards and 50mm long x 10.5mm wide x 1.4mm thick staples for 25mm thick boards.

A company who manufacture a staple that complies with these minimum sizes is Senco, who supply 34.9mm long x 10.6mm wide x 1.4mm thick staples (product code: N16BABB), and 50.8mm long x 10.6mm wide x 1.4mm thick staples (product code: N21BABB). The gun used for these staple sizes is the Senco SNS50XP-N.

Some stockists of the staples and guns are listed below:

Power Tools Direct - sales@powertoolsdirect.com, 01903 776610

Collated Fasteners - 0560 113 9922, ldleigh@btconnect.com