Can construction screws replace lag bolts?

Many structural screws are code-approved to replace lag bolts in specific applications. Check the ICC-ES evaluation report for your specific screw.

Are construction screws better than nails?

They offer better withdrawal resistance and are removable, but may have lower shear strength. Always verify code compliance.

Construction Screws

Hardware & Fasteners

Screws

Budget: $15-$25/box 100 ct (general purpose) | Mid-range: $25-$50/box (structural rated) | Premium: $40-$80/box (large diameter structural)

Construction Screws: Structural Wood Screws for Framing & Decks (2026)

Prepared by Lumberama's Building Materials Team

|Last updated May 25, 2026|Sources & methodology

Construction screws are heavy-duty structural fasteners designed as modern alternatives to lag bolts, through-bolts, and nails in many wood framing applications. They feature deep threads, self-drilling tips, and star drives for fast installation without pre-drilling. Many are code-approved for structural connections.

Key Features

Code-approved structural ratings; Self-drilling tips eliminate pre-drilling; Star drive prevents cam-out; Deep threads for high withdrawal strength; Coated for treated lumber compatibility

Specifications

Sizes: #9 x 2-1/2" to #14 x 6" | Material: hardened steel with polymer coating | Drive: T-25

T-30 star | Shear strength: 200-600 lbs (varies) | Approval: ICC-ES evaluated

Applications

Deck ledger board attachment; Framing connections alternative to nails; Joist hanger installation; Structural beam and post connections; Heavy-duty woodworking joints

Installation Overview

Position materials and drive screw directly using impact driver or drill with star bit. No pre-drilling required in most softwoods. Drive flush to surface - do not overdrive. Follow manufacturer span tables for structural applications.

Pros & Cons

Pros

✓ Faster than lag bolts (no pre-drilling); Code-approved structural ratings; Star drive eliminates cam-out; Removable and reusable

Cons

✗ More expensive per fastener than nails; Must verify code approval for structural use; Not all screws are structurally rated; Requires impact driver for large sizes

Top Brands

GRK

SPAX

Simpson Strong-Tie SDS

Code Requirements

Must have ICC-ES evaluation report for structural use. Verify specific screw model is approved for intended connection. Follow manufacturer load tables. Not all construction screws are code-approved.

Buying Tips

Verify the ICC-ES evaluation report number for any screw used in structural applications; GRK RSS and SPAX PowerLags are widely code-accepted; Invest in a good impact driver for driving large construction screws