Construction World February 2017

WOOD CONSTRUCTION

High-strength, fast driving structural timber fasteners For over 60 years, Simpson Strong-Tie ® has focused on developing products that help people build safer and stronger structures. Simpson Strong-Tie is synonymous with high quality innovative construction solutions.

Strong-Drive ® SDWS Framing screw

Strong-Drive ® SDWS TRuss-ply screw

The company’s success can also be attributed to its customer oriented focus to develop new ways for construction. In line with its history of innovation Simpson Strong-Tie has expanded its range of structural fasteners in South Africa to include the new Simpson Strong-Tie Strong-Drive ® SDWS Framing Screw as well as the heavier duty SDW screw. The Strong-Drive ® SDWS Framing Screw is a versatile structural fastener and has been designed for framing and remodelling applications, where the superior holding power and pull-out resistance of screws is required over nails. The SDWS Framing screw has a SawTooth™ Type-17 point with serrated threads that makes for fast starts with reduced torque and no pre-drilling. Every part of the fastener design is considered and the T25 bit holds the 6-lobe recess tightly, reducing cam-out and head stripping.

Simpson Strong-Tie uses its Quik Guard ® coating on the SDWS Framing Screw which provides extra corrosion protection for the use in exterior applications as well as with preservative treated timbers further increasing the versatility of this fastener. Clamping force is what makes a strong joint. The thread design of the SDWS Framing Screw allows for greater grip into the timber while the head design means that it will clamp the timber members as opposed to burying the head into the timber. The Strong-Drive ® range of premium fasteners also includes the SDW Timber Screw which has been designed for greater shear capacity as it is larger in diameter. The SDW timber screw will replace a bolt in this application giving the clamping and

shear capabilities of a bolt without needing to drill a hole. The installation time is also dramatically reduced as there is no need to tighten a nut and bolt. Place the screws at the crossover of the timber members and drive it home. Watch the timber members pull together as the SDW screw engages and clamps the timber together. Using the SDW screw as the fastener for the purlin to the truss will ensure that the connection of the roof sheeting through the purlin to the truss is secure, even in the harshest conditions. With Simpson Strong-Tie’s aim to build safer stronger structures more economically, you achieve the clamping and holding capacity of bolt with quicker installation time on site, saving time and money. 

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CONSTRUCTION WORLD FEBRUARY 2017