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PowerLags®
InteriorPowerLags®
T-STAR WASHER HEAD BLACK eCOAT
SPAX® T-STAR Washer Head PowerLags® with black eCoat coating bring a new level of fastening efficiency and reliability to log home and timber frame construction. SPAX® serrated threads eliminate pre-drilling and dramatically increase installation speed. They are also code listed and load rated, so you can be assured of the reliability of the assembly. The two head styles available offer job-matched performance and aesthetics.
Available in: 5/16" diameter
Purchase Options:
Material & Coating
Cold-rolled carbon steel wire, heat treated for strength and durability, and plated with eCoat finish to prevent red rust. eCoat is recognized for use in above ground contact pressure treated lumber for interior dry/damp general construction applications (e.g., AWPA UC1-UC2).
Features
- IRC / IBC Code Compliant DrJ TER No. 1912-07 Structural Fastener Properties
- Low-profile, large diameter head designs provide exceptional draw down logs
- Heat treated for strength and durability
- T-STAR drive provides superior bit engagement and allows for easy back-out of the fastener if necessary when the head is countersunk
- Serrated threads require up to 40% less driving torque to increase installation speed while helping prevent cracking in logs
- Proprietary coating provides excellent corrosion resistance and prevents staining wet logs
- Fastener length stamp on the head provides convenient identification without measuring and aids on-site inspections
- Job site friendly and weather-resistant packaging
- German engineered thread technology; American made
SPAX ENGINEERED FASTENERS ARE THE MOST ADVANCED FASTENER PRODUCT ON THE MARKET
Typical Applications
- Wall log attachment / assembly (Log homes)
- Beams and engineered wood connections (Timber Framing)
- Structurally Insulated Panels
- Landscaping timbers
Downloads
Code Reports
Reference Lateral Shear Values
Product Brochures
CAD & Dimensional Drawings
Download AllDesign Values & Loads
Southern Pine(SG=.55)
| Diameter | 5/16" |
|---|---|
| Withdrawal W (lbs./inch) | 415 |
| Head Pull-Through WH (lbs.) | 965 |
Douglas Fir(SG=.50)
| Diameter | 5/16" |
|---|---|
| Withdrawal W (lbs./inch) | 300 |
| Head Pull-Through WH (lbs.) | 840 |
Hem Fir & Spruce-Pine-Fir(SG=.42)
| Diameter | 5/16" |
|---|---|
| Withdrawal W (lbs./inch) | 250 |
| Head Pull-Through WH (lbs.) | 665 |
ALLOWABLE WITHDRAWAL (W) AND HEAD PULL-THROUGH (WH)
- “Withdrawal” and “Head Pull-Through” design values shall be adjusted by all applicable adjustment factors per NDS Table 11.3.1.
- “Withdrawal” design values are to be multiplied by the length of the thread penetration into the side grain of the main member. Length includes tip.
- “Withdrawal” design values are from the main member, and “Head Pull-Through” design values are based on a minimum of 1-1/2" side member thickness.
- Tabulated “Withdrawal” and “Head Pull-Through” design values are for the wood species with the listed assigned specific gravities. Where the wood species assigned specific gravity is not listed, use the next lower assigned specific gravity values.
