SDS screws are an easy to install method for joining multiple SCL members to make a beam.

Installation:

• No pre-drilling required.
• See illustrations for SDS positioning on different assemblies.
• Install with high-torque, low-speed drill (5 amp+).
• Do not over-drive the SDS screws.

Design:

• SDS allowable load values are from ICC ESR-2236. The Designer shall apply adjustment factors per the NDS. Loads shown are C_D = 1.0. Increase as allowed per code to a maximum C_D = 1.60.
• This document uses Douglas Fir-Larch values (G = 0.5), as per the LVL, PSL and LSL manufacturer's instructions.
• The designer shall specify the location of all screws (stagger screws on opposite faces). Minimum recommended spacing - Wide Face: end distance 4", edge distance 1 1/2", spacing parallel to grain 4", spacing perpendicular to grain 2".
• Uniform loads in the table below are based on the capacity of the fasteners to transfer loads between plies. The capacity of the LVL beam may be less and should be checked by a qualified designer or with the manufacturer's literature.
• LSL applications are limited to assemblies using 3 1/2" SDS screw lengths (Assembly A, B1, D, E).
• Contact Simpson for information regarding installations to TimberStrand® LSL.