Wedge Anchor
1/2" Wedge Anchor
Quick Answer
A 1/2" Wedge Anchor needs a 1/2" pilot hole, drilled to embedment + 1/2" clearance, with 2-1/4" minimum embedment, torqued to 50-60 ft-lbs.
Where to Buy
As an Amazon Associate, BuildToolHQ earns from qualifying purchases. Specifications are for guidance only — always verify against the anchor manufacturer's ICC-ES ESR report and local building codes.
Full Specification
Best For
- ✓Heavy structural steel
- ✓Large machinery anchoring
- ✓Structural column bases
- ✓Seismic applications
Not For
- ✗Hollow block
- ✗Brick
- ✗Thin concrete slabs
- ✗Near edges without reduction
How a Wedge Anchor Grips
A wedge anchor grips by flaring an expansion clip against the hole wall as the nut is torqued, converting clamping tension into outward friction. Unlike a self-tapping screw, the hole is drilled at the anchor's own diameter, and grip quality depends heavily on a clean, correctly-sized, dust-free hole.
Installation Tips
Frequently Asked Questions
What size drill bit does a 1/2" Wedge Anchor need?
Use a 1/2" carbide masonry bit, drilled to embedment + 1/2" clearance.
How much weight can a 1/2" Wedge Anchor hold?
750 lbs tension, 1,391 lbs shear safe working load. Actual capacity depends on base material strength and embedment — verify against the manufacturer's ICC-ES ESR data for structural work.
How deep should the hole be?
Drill to embedment + 1/2" clearance. Minimum embedment for this anchor is 2-1/4" minimum.
How much should a 1/2" Wedge Anchor be torqued?
Tighten to 50-60 ft-lbs. Over-torquing is a common cause of anchor failure.
Can a Wedge Anchor be removed after installation?
No — this is a permanent installation; the anchor body stays in the hole.
Free Tool · Built on ACI 318-19
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