SDW

Structural Wood Screw

The Strong-Drive® SDW screw is a 8.0mm diameter, high-strength structural wood screw specifically designed for fastening multi-ply wood members together such as plated trusses, engineered timber products and solid-sawn timber. CE marked to EN14592. Driver bit included in every box.

Technical Data Sheet

CE Marking

Service class 2

Indoor

Black finish

Solid Wood

Product Details

Images

Features

Material

Heat treated carbon steel - black E-coat™

Features

The SDW installs easily with no pre-drilling and is available in optimized lengths for fastening 2, 3 and 4-ply trusses or 45mm engineered timber such as Laminated Veneer Lumber (LVL). The SDW enables single-side fastening, while still allowing concurrent loading on both sides of the assembly to the full allowable head or point-side load of the fastener.

CE marked to EN14592
Low-profile head for reduced interference during handling or installation of hardware on the assembly
High shear values enable wider screw spacing
Bold thread design firmly clinches plies together to close gaps in multi-ply assemblies
Optimal screw lengths provide maximum point side penetration
Driver bit included in each box

Application

Common Applications

Fastening of multiple wood elements including uprights and trusses
Solid wood
Engineered timber

Technical Data

Dimensions

Product Dimensions

References	Fastener Dimensions [mm]					Driver Bit
References	l	l_g	d₁	d	d_h	Driver Bit
SDW22258-R50E	66	36	5.6	8	19	T-40
SDW22338-R50E	86	40		8	19	T-40
SDW22438-R50E	111	37		8	19	T-40
SDW22600-R50E	152	37		8	19	T-40

Structural Parameters - hEN14592

References	Characteristic Yield Moment - Threaded Section - M_y,k [M_y.k] [Nm]	Characteristic withdrawal parameter - f_ax,k,90° [f_ax.k.90°] [N/mm²]	Characteristic head pull-through parameter - f_head,k [f_head.k] [N/mm²]	Characteristic tensile capacity - f_tens,k [f_tens.k] [kN]	Characteristic torsional strength - f_tor,k [f_tor.k] [Nm]	Torsional ratio
SDW22258-R50E	17.4	13.2	21.4	21.4	24.2	4.5
SDW22338-R50E	17.4	13.2	21.4	21.4	24.2	4.5
SDW22438-R50E	17.4	13.2	21.4	21.4	24.2	4.5
SDW22600-R50E	17.4	13.2	21.4	21.4	24.2	4.5

Installation

SDW screws install best with a low-speed drill and a T40 6-lobe bit (bit included with every box of screws).
Pre-drilling is typically not required. SDW screws may be installed through metal truss plates as approved by the truss designer
Drive the fastener so that the top of the head is slightly embedded into the top surface of the timber. To ensure correct performance, do not under or over-drive the fastener.
Individual screw locations may be adjusted up to 75mm to avoid conflicts with other hardware or to avoid timber defects.