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PowerLags®
InteriorPowerLags®
T-STAR WASHER HEAD YELLOW ZINC POWERLAGS®
SPAX® T-STAR Washer Head PowerLags® with yellow zinc coating designed with low-profile, large diameter head design provides outstanding clamping force and improved aesthetics. The T-STAR drive offers excellent bit engagement without requiring a special driver bit. Available in 1/4”, 5/16”, and 3/8” diameters.
Available in: 1/4", 3/8", and 5/16" diameters
Purchase Options:
Material & Coating
Cold-rolled carbon steel wire, heat treated for strength and durability, and plated with a yellow zinc finish to prevent red rust. Yellow zinc is tested and recognized for use in above ground contact pressure treated lumber for interior dry/damp general construction applications (e.g., AWPA UC1-UC2).
Features
PowerLags® are the ideal replacement for conventional lags!
- IRC / IBC Code Compliant DrJ TER No. 1912-07 Structural Fastener Properties
- DrJ Technical Evaluation Report (TER No. 1802-03; Multi-Ply; Sawn lumber assemblies and engineered wood - LVL, PSL and LSL assemblies)
- Heat treated for strength and durability
- No pre-drilling required (1/4" and 5/16")
Note: Lead holes of 11/64" (0.172") diameter are required for 3/8"
- Serrated threads require up to 40% less driving torque to increase installation speed while helping prevent cracking in lumber
- Built-on washer head designs eliminate the need and extra cost of a separate washer
- Fastener length stamp on the head provides convenient identification without measuring and aids on-site inspections
SPAX ENGINEERED FASTENERS ARE THE MOST ADVANCED FASTENER PRODUCT ON THE MARKET
Typical Applications
- Multi-ply engineered wood (LVL, PSL, LSL) assemblies
- Multi-ply sawn lumber assembly
- Interior framing applications
- Shelving applications
- Indoor furniture
Videos
SPAX PowerLags T-Star Washer Head Yellow Zinc Interior Structural Construction Lag Screws
SPAX PowerLags T-Star Washer Head Yellow Zinc interior structural construction fasteners are engineered to last longer and hold stronger
SPAX: Ultimate Strength For Multi-Ply LVL Beams
PowerLags offer the highest withdrawal and pull-through values in the industry, perfect for Multi-Ply (LVL, PSL and LSL) assemblies
Downloads
Product Brochures
Application Guides
Product Submittals
Reference Lateral Shear Values
Technical Bulletins
CAD & Dimensional Drawings
Download AllDesign Values & Loads
Southern Pine(SG=.55)
| Diameter | 1/4" | 5/16" | 3/8" |
|---|---|---|---|
| Withdrawal W (lbs./inch) | 375 | 415 | 465 |
| Head Pull-Through WH (lbs.) | 860 | 966 | 1245 |
Douglas Fir(SG=.50)
| Diameter | 1/4" | 5/16" | 3/8" |
|---|---|---|---|
| Withdrawal W (lbs./inch) | 310 | 300 | 300 |
| Head Pull-Through WH (lbs.) | 785 | 840 | 1085 |
Hem Fir & Spruce-Pine-Fir(SG=.42)
| Diameter | 1/4" | 5/16" | 3/8" |
|---|---|---|---|
| Withdrawal W (lbs./inch) | 245 | 250 | 280 |
| Head Pull-Through WH (lbs.) | 585 | 665 | 880 |
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.
