SPAX® PowerLags® vs Conventional Lag Screws
While conventional lag screws have long been used for heavy-duty wood construction, SPAX® PowerLags® are engineered as a structural fastening alternative designed to install faster and easier. Below, we break down the differences between PowerLags and conventional lag screws, what lag screws are commonly used for, and how to choose the right fastener for your project.
SPAX® Delivers the Highest Structural Values in the Industry
LAG BOLT VS. LAG SCREW: WHAT'S THE DIFFERENCE?
The terms "lag bolt" and "lag screw" are often used interchangeably, but lag screw is the more accurate term for this type of fastener. Unlike a traditional bolt that typically passes through materials and is secured with a nut, a lag screw uses coarse threads to create a strong connection directly in wood or another compatible material.
Traditional lag screws typically feature a hex head and are used where greater holding strength is needed than a standard wood screw can provide.
WHAT ARE LAG SCREWS USED FOR?
Lag screws are commonly used for heavy-duty wood connections and construction projects where strength and holding power are important. Typical applications can include:
- Structural wood-to-wood connections
- Deck and deck ledger construction
- Timber and post connections
- Pergolas and other outdoor structures
- Fencing and heavy wood assemblies
- Multi-ply beams and engineered wood applications
The appropriate fastener, diameter, length, coating, and installation method will depend on the materials, environment, and structural requirements of the application.
POWERLAGS® VS. CONVENTIONAL LAG SCREWS
Both conventional lag screws and SPAX® PowerLags® can be used to create strong wood connections, but PowerLags are engineered to simplify installation while providing code-recognized structural performance.
Some key differences include:
- Pre-drilling: Conventional lag screws commonly require a pilot hole. Select SPAX® PowerLags® can be installed without pre-drilling, depending on the fastener size and application.
- Driving torque: SPAX® patented thread serrations require up to 40% less driving torque, helping improve installation speed.
- Washer requirements: SPAX® PowerLags® are available with built-on washer head designs that eliminate the need for a separate washer.
- Installation: PowerLags® are designed for efficient installation using common power tools, reducing the number of steps required for many wood-to-wood connections.
- Size options: PowerLags® are available in multiple diameters, lengths, head styles, drive systems, and coatings for different structural applications.
- Corrosion resistance: HCR® PowerLags® provide corrosion protection for qualifying exterior applications, while zinc-coated options are available for interior applications.
These features make SPAX® PowerLags® a high-performance alternative to conventional lag screws for many structural wood fastening applications.
WHY CHOOSE SPAX® POWERLAGS® FOR STRUCTURAL WOOD CONNECTIONS?
SPAX® PowerLags® offer the largest selection of code-recognized structural wood-to-wood fasteners in the industry and drive faster and easier than conventional lags and other structural screws. Every PowerLag is crafted in the USA for superior reliability, strength and performance. Plus, each screw features SPAX® patented serrated thread technology to reduce driving torque and help speed installation. Select PowerLags® can be installed without pre-drilling, helping both professional contractors and DIYers create strong wood-to-wood connections with fewer installation steps.
PRODUCT FEATURES:
- Code listings ICC-ES No. ESR-1782
- Technical Evaluation Report – DrJ TER – No. 1711-01 (deck ledger attachment) and TER No. 1802-03 (multi-ply; LVL beams, girder truss applications)
- Heat treated to Grade 5 durability
- Available in 1/4”, 5/16”, 3/8” and 1/2” diameters in lengths up to 12”
- Patented thread serrations require up to 40% less driving torque to increase installation speed while helping prevent cracking in logs
- 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
- Sold in job-friendly package quantities, including Bulk Pails
POWERLAGS® CAN REDUCE INSTALLATION TIME AND TOOLS
SPAX® PowerLags® are engineered for structural wood-to-wood connections and provide an efficient alternative to conventional lag screws. Features such as patented thread serrations, built-on washer head designs and options that require no pre-drilling can help simplify installation, reduce the number of tools and components needed, and save time on the job.
For specialized heavy-timber applications, PowerLags® for Log Homes provide a fastening solution designed for log home and timber frame construction.
Explore the full SPAX® PowerLags® selection to find the appropriate head style, coating, diameter and length for your structural fastening project.
Our Double Barrier Coating
Our HCR® (High Corrosion Resistance) double-barrier coatings offer superior protection with a double barrier. First plated with a zinc base coat and finished with a durable top coat, they’re engineered to hold up to the harshest conditions. Tested and recognized for use in ground contact pressure treated lumber for exterior, freshwater general construction applications (e.g., AWPA UC1-UC4A, UCFA).
DID YOU KNOW?
Some competitors don’t actually test their coatings. They rely on data from their paint company before it makes it onto their screws.
SMART ALTERNATIVE FOR THE CONVENTIONAL LAG
High Performance. High Value.
The largest selection of code-recognized structural wood-to-wood fasteners in the industry!
