ASSY Self-Tapping Screws Geometry Requirements, Part 2
MTC Solutions’ design guides contain all the requirements for designers to properly detail connections, ensuring that stresses are safely transmitted without causing wood splitting. This two-part technical blog series, “Self-Tapping Screws, Geometry Requirements”, will answer some of the most frequently asked questions about connection geometry requirements when designing with ASSY self-tapping screws.
Part 2 will cover geometry considerations for screw connections in CLT and Douglas fir along with some special detailing for connections with axially loaded inclined self-tapping screws.
Previously, Part 1 of this blog series covered the basics of the Spacing, End & Edge Distance Geometry Requirements, exploring what the requirements represent, load directions and the wedge effect, along with the differences in connection detailing when using fully threaded and partially threaded screw types.
Approximately 7-minute read.
Geometry Requirements in Cross Laminated Timber
Cross-Laminated Timber (CLT) panel is an engineered multi-layer mass timber product consisting of several layers of lumber boards oriented in alternating directions, bonded with structural adhesives, and pressed into very stiff and strong panels capable of handling large structural loads. The cross-laminated structure of several wood grains stacked in an alternating fashion means that a fastener installed in CLT can apply forces along either the strong or weak axes of multiple lumber boards in combination, effectively reducing the wood’s natural tendency to split. This is reflected in the MTC Solutions’ Structural Screw Design Guide under CLT Requirements for non-pre-drilled self-tapping fasteners.