Use and Care Manual

ManualsBrandsMiTek ManualsBuilding Hardware1-7/16 in. x 1-7/16 in. x 2-3/4 in. G185 18-Gauge Framing Angle (85-Pack)

Fasteners

MiTek

Product Catalog

WSWH Washer Head Interior Structural Wood Screw Application

Joining Multi-Ply Dimensional Lumber Beams Application

The MiTek Pro Series WSWH Structural Wood Screws have been

designed specically for use in joining wood members of multiple-ply

dimensional lumber beams. Using a standard 1/2'' low speed/high torque

drill, install screws into the side of the outermost ply. As the threads

fully engage the nal ply, allow the underside of the washer head

to pull the plies rmly together. Washer head will install ush with

the surface of the wood, but do not overdrive as this may damage

the beam. Refer to the information on page 29 for proper

WSWH screw size selection and fastening pattern.

Minimum Spacing Requirements:

Minimum end distance = 3-3/4"

Minimum edge distance = 1-3/4"

Minimum spacing between rows

of screws = 1-3/4"

Minimum spacing between

screws in a row = 3-1/2"

WSWH278 – 2-7/8"

WSWH45 – 4-1/2"

WSWH6 – 6"

• Excessively warped or curved lumber

should never be forced into alignment

by use of clamps, screws or bolts as

splitting may occur, potentially decreasing

the carrying capacity of the beam.

• The WSWH278, WSWH45, and WSWH6 are not designed

for use with engineered wood. Refer to MiTek’s Joining

Multi-Ply Engineered Wood (EWP) Beams Application

information on page 30.

• A qualied designer or engineer

should always be consulted

for critical assemblies and

fastening requirements.

General Guidelines:

USP

Brand

Length

Designation

Fastener Identication

For easier selection and post installation inspection, all

MiTek Pro Series Structural Wood Screws carry an identifying head marking.

Top Loaded Beams

24"

18"

Where oor joists rest on all plies of the beam, WSWH screws should

be installed in two staggered rows at 24" O.C. spacing. Maintain the

minimum end and edge distance as indicated above.

For beam depths of 18" or more, this pattern should be increased

to three staggered rows of WSWH screws every 24" on center.

Continued on next page