In timber engineering the joining of members is generally a critical factor in the design of a structure, which places emphasis on the type of connection used. Metal dowel-type fasteners and bearing-type connectors are the most common form of connector.
Why is the Structural Timber Wood Screw different?
- It is a high-strength wood screw manufactured from heat-treated carbon steel in different lengths. This is an alternative to connections via bolting and traditional coach (lag) screws.
- The 6 and 8mm washer head screw has a 14 and 22mm washer head with a serrated tread point.
- Installs easily with a six-lobe driver bit and requires no pre-drilling.
- Is used for connections in load bearing timber structures between members of solid timber, glued laminated timber, cross laminated timber and laminated veneer lumber, similar glued members, wood-based panels or steel. The high-strength wood screw is also used as tensile or compressive reinforcement perpendicular to the grain.
- Corrosion treatment is equivalent to hot-dip galvanisation.
- Purlin to rafter connection
- Connection of insolation board material onto rafter or between rafters
- Connection of multi-ply truss members
- Connection of timber frame panels
- Truss to top plate connection
- Tensile or compressive reinforcement of timber members
- Structural insulated panel erection
- Shed and stable erection
- Timber fence pole connections
- Gum pole connections for thatched lapa framework
- Easy connection for wood components without pre-drilling and timber splitting
- Tested engineering design values via ETA approval
- Exceptional aesthetic appearance
- Misplacement easy to rectify by unscrewing and refitting
- Time-saving contributed to labour-saving
- Visual characteristic head marking for inspectorate
Frequently asked questions:
Q: Are all the imported structural timber screws of the same quality?
Q: How can I be certain the structural screw will perform as advertised?
Unfortunately, the SABS does not have a National Standard for structural timber screw product requirements, and it is the responsibility of the user to make an informed decision on the correct strength and corrosion-treated structural timber screw to use in the connection.
To make the correct decision on which screw to use, clarify with the supplier the following:
Q: What is an ETA?
Q: Will the structural timber screw be the answer for insulation over rafter connections?