The Strong-Drive SDW EWP-Ply screw is a high-strength structural wood screw specifically designed for fastening multi-ply wood members, such as engineered wood products and solid sawn lumber. The SDW EWP-Ply installs easily with no predrilling and is available in optimized lengths for fastening 1 3/4" engineered lumber, such as structural composite lumber (SCL). The large, flush head eases the handling of assembled girders and simplifies the installation of finishes or structural connectors. It is code listed under IAPMO-UES ER-192 and meets 2012 and 2015 IRC® and IBC® code requirements for several common wood framing applications.
Large washer head provides maximum bearing area; stamped with the Simpson Strong-Tie “≠” sign and fastener length for easy identification after installation (0.75" head dia.)
Deep 6-lobe T-40 recess reduces cam-out, making driving easier
Low-profile head results in less interference after installation; makes stacking and sliding members easier and allows installation of hardware and finishes to be virtually flush
Optimal screw lengths provide maximum penetration while preventing the point from protruding out the back of the member
Specific thread lengths avoids jacking
Higher shear values than competitive products enable wider spacing saving time and money
Bold thread design provides superior holding power and cinches fastened members together for consistent installation
Patented 4CUT™ point ensures fast starts, reduced installation torque and eliminates the need for predrilling in most applications
Retail and mini-bulk packs include one 6-lobe, T-40 driver bit; bulk packs include two driver bits
Multi-ply wood members, engineered lumber products and solid sawn lumber
SDW EWP-PLY — Allowable Shear Loads —
LVL, PSL and LSL Loaded on Head Side
For minimum penetration into main (outermost) member of 1 1/2", use 300 lb.
Loaded on Head Side (3-ply assembly shown – other configurations similar)
SDW EWP-PLY — Allowable Shear Loads — Load
LVL, PSL and LSL Loaded on Point Side
For minimum penetration into main member of 1 1/2", use 300 lb.
Loaded on Point Side (3-ply assembly shown – other configurations similar)
SDW EWP-PLY — Allowable Shear Loads — Two-Ply
3x2 / 4x2 Parallel-Chord Trusses Loaded on Either Side
To transfer uniform or concentrated loads applied to simply supported spans on assembly top chord:
Space screws as required to transfer half the load into the supporting truss.
Minimum screw spacing shall be 4 " o.c.
To transfer concentrated loads applied to simply supported spans on an assembly top chord or vertical web:
Concentrated loads must be applied at a panel point.
Screws to be installed within 12 " of the concentrated load on top-chord assembly
Gap between the trusses shall not exceed 1/8 ".
Floor sheathing shall be screwed or nailed to each top-chord ply. (Fastener spacing per the applicable Code requirements, or 12" o.c.)
SDW screws shall not be installed in areas where lumber wane exceeds 1/4".
Hangers on skewed girders:
Hanger loads not exceeding 34" o.c. on a skewed girder (resulting from uniformly spaced joists up to 24" o.c.) may be converted to a uniform load.
For girders with hanger load spacing in excess of 34" o.c. the loads shall be considered as concentrated loads at the applicable locations.
Other configurations acceptable when approved by Truss Designer.
SDW Screw Position in 2-Ply 4x2 Truss (2-ply 3x2 similar)
SDW EWP-PLY — Allowable Uniform Load (plf) Applied to Either Outside Member —
Side-loaded Multi-Ply LVL, PSL, and LSL Assemblies
Each ply is assumed to carry same proportion of load. Loads may be applied
to the head side and point side concurrently provided neither published
allowable load is exceeded. (Example: a 3-ply assembly with a head side load
of 1,300 plf and point side load of 1,000 plf may be fastened together with 3
rows of SDW at 16" o.c. between fasteners in a row.)
When hangers are installed on point side, hanger face fasteners shall be a
minimum of 3" long.
Tables are based on main member penetration as noted in single-fastener