PreparationIf you need to cut the GRP product, a good quality abrasive disc, jigsaw or hacksaw can be used. The GRP material is quite tough to cut by hand, so if power tools are not readily available, please ask about our cut to size service.
Fixings
If mechanical fixing is required, the following may be used as a guide:
To timber: No.8 x 30mm zinc plated or stainless steel screws.
To steel plate: No.8 x 20mm self-tapping pan head Pozi stainless steel screws or No.8 x 20mm self drilling pan head Philips zinc plated screws.
To concrete: No.8 x 30mm zinc plated or stainless steel impact anchors (Hilti HPS-1 or similar).
To open mesh: Stainless steel or zinc plated saddle clips and domed head bolts suitable in length for the depth of the existing treads.
Application
Lay the items in place to ensure that they fit. Trim using a jigsaw with medium cutting blades (Bosch TI01 AIF or similar are ideal).
These are supplied pre-drilled by us. We use a number 10 drill and a number 8 screw. The larger hole size allows for any slight movement that may arise due to the long, thin shape on timber which can flex or expand. If any additional screw fixings are required, please use a number 10 drill and number 8 screw.
