Technical Specifications
Fasteners
25
© 2015 MiTek. All rights reserved.
WS Structural Wood Screws
The WS Wood Screw is a self-drilling screw used for numerous
framing applications. This screw features a reverse locking serration
on the bottom of the screw head to help prevent over tightening
against a steel plate. The USP head stamp identies screws for
easy inspection.
Screw shear capacities are based on a diameter of 0.242" when the
shear plane is on the screw shank (SH) and 0.185" when the shear
plane is on the knurl or threads (T). USP WS Wood Screws have a
bending yield strength of 180,000 psi. For conditions not charted
here, screw loads may be calculated as shown in the NDS
®
and
increased for duration of load.
Materials: 1/4" diameter Grade 5 steel
Finish: See chart
Options: See chart for Corrosion Finish Options
Codes: See page 11 for Code Reference Key Chart
Installation:
• Screws are self-drilling.
• Install using a low speed clutch drill with 3/8" hex head driver.
The washer head should be at to the surface and the serrations
will oppose turning and release the clutch. Do not over-tighten
the screws.
• Installing the screw at an angle may introduce additional bending
and tension forces into the fastener if the screw head is not at on
the bearing surface. Care should be given to ensure the fastener is
installed perpendicular to the plane of the side plate.
• For attaching multi-ply wood trusses or LVL or PSL members,
or oor trusses, see pages 26-28.
WS
WS15-GC
Size (in) Ref. No. L SH T Thread
Finish
1
100% 100%
1/4 x 1-1/2 WS15 SDS25112 1-1/2 1/4 1-1/4 1-1/4 Zinc -- -- 230 261 259 266 164 206
1/4 x 2 WS2 SDS25200 2 1/4 1-3/4 1-3/4 Zinc -- -- 306 307 289 316 160 281
1/4 x 2-1/2 WS25 SDS25212 2-1/2 1/4 2-1/4 2 Zinc 193 362 352 338 369 199 398
1/4 x 3 WS3 SDS25300 3 3/4 2-1/4 2 Zinc 227 418 396 387 457 199 398
1/4 x 3-1/2 WS35 SDS25312 3-1/2 3/4 2-3/4 2-1/2 Zinc 233 451 460 454 481 208 520
1/4 x 4-1/2 WS45 SDS25412 4-1/2 1-1/4 3-1/4 3 Zinc 233 516 588 589 531 214 642
1/4 x 6 WS6 SDS25600 6 1-3/4 4-1/4 4 Zinc 233 516 588 589 531 214 642
1/4 x 8
WS8
SDS25800 8 1-3/4 4-1/4 4 Zinc 233 516 588 589 531 214 642 12
Size (in) Ref. No. L SH T Thread
Finish
1
100% 100%
1/4 x 1-1/2 WS15 SDS25112 1-1/2 1/4 1-1/4 1-1/4 Zinc -- -- 188 211 190 217 103 129
1/4 x 2 WS2 SDS25200 2 1/4 1-3/4 1-3/4 Zinc -- -- 215 244 249 248 117 204
1/4 x 2-1/2 WS25 SDS25212 2-1/2 1/4 2-1/4 2 Zinc 141 256 292 286 294 141 281
1/4 x 3 WS3 SDS25300 3 3/4 2-1/4 2 Zinc 164 297 340 322 365 141 281
1/4 x 3-1/2 WS35 SDS25312 3-1/2 3/4 2-3/4 2-1/2 Zinc 181 338 380 356 370 154 385
1/4 x 4-1/2 WS45 SDS25412 4-1/2 1-1/4 3-1/4 3 Zinc 181 421 460 425 379 163 489
1/4 x 6 WS6 SDS25600 6 1-3/4 4-1/4 4 Zinc 181 421 460 425 379 163 489
1/4 x 8
WS8
SDS25800 8 1-3/4 4-1/4 4 Zinc 181 421 460 425 379 163 489 12
1) Zinc = Yellow Zinc Dichromate.
2) Allowable shear loads assume a side plate tensile strength of 45 ksi for 14 gauge and 10 gauge, 52 ksi for 7 gauge and 58 ksi for 3 gauge.
3) Shear loads for wood-to-wood connections assume a side member thickness of 1-1/2".
4) Loads are for 100% duration of load factors, and may be increased for other duration factors in accordance with the NDS.
5) Loads are for shear applications when used as described in this catalog. Please contact USP for applications and installations involving tension forces.
6) Withdrawal loads for steel-to-wood connections assume a side plate thickness of 1/4" or less.
New products or updated product information are designated in
blue font
.
Code
Ref.
12,
F29,
R15
USP
Stock No. 14 10 7 3
Withdrawal
Capacity
(Lbs/in.
of thread)
Dimensions (in)
S-P-F Allowable Loads (Lbs.)
2,4,5
Shear (100%)
Withdrawal
Capacity
(Lbs/in.
of thread
Steel to
Wood
Withdrawal
Capacity (Lbs.)
6
Wood
to
Wood
3
Steel to Wood
6
Gauge
Code
Ref.
12,
F29,
R15
Corrosion
Finish
Corrosion
Finish
USP
Stock No.
Shear (100%)
Wood
to
Wood
3
14
Steel to Wood
6
3
Gauge
Dimensions (in)
Steel to
Wood
Withdrawal
Capacity (Lbs.)
6
DF/SP Allowable Loads (Lbs.)
2,4,5
10 7
1) Zinc = Yellow Zinc
Dichromate.
2) Allowable shear loads
assume a side plate
tensile strength of 45
ksi for 14 gauge and
10 gauge, 52 ksi for 7
gauge and 58 ksi for 3
gauge.
3) Shear loads for wood-
to-wood connections
assume a side member
thickness of 1-1/2".
4) Loads are for 100%
duration of load factors,
and may be increased
for other duration
factors in accordance
with the NDS.
5) Loads are for shear
applications when used
as described in this
catalog. Please contact
USP for applications
and installations involv-
ing tension forces.
6) Withdrawal loads
for steel-to-wood
connections assume a
side plate thickness of
1/4" or less.
New products or updated
product information are
designated in blue font.
Corrosion Finish
Stainless Steel Gold Coat
HDG Triple Zinc
Corrosion Finish Stainless Steel Gold Coat HDG Triple Zinc
Corrosion
Finish
Stainless Steel
Gold Coat
HDG
Triple Zinc
T
L
SH
Serrations
1/4" Beveled reamer
on 2-1/2" or longer
wood screws
Cut threads
Self drilling point
USP Name
3/8"
Screw length
Fasteners