No matter whether concrete roof, metal tile roof, asphalt, or long-run roof, the wind uplift resistance is only as good as the connection between the roof cladding and the trusses or rafters.
The SDWS16 Framing Screw from Simpson Strong-Tie is the perfect choice when requiring greater holding power and pullout resistance.
Purlin/batten screws
The SDWS16 Framing Screw is a 4mm shank and 3.7mm root or core diameter, 89mm-long structural screw, designed with a SawTooth point that makes for fast installation without pre-drilling.
Its 11.2mm diameter washer head with box-nibs increases clamping force, and countersinks easily to provide a flush finish.
Due to its super holding power and pullout resistance, the SDWS16 is perfect for fixing purlins/battens to rafters/trusses where nails are not providing a strong enough wind uplift connection.
Alternative to NZS3604:2011
The SDWS16’s 10g size and 89mm length meets the NZS3604 fastener requirements for fixing roof battens or purlins to rafters or roof trusses to resist wind uplift.
Technical data sheet
Characteristic withdrawal and pull-through capacity data for Specific Engineering Design is available on the Technical Data Sheet.
