Fasteners
Anchors
Simpson Strong-Tie
$5-$25 per packWedge Anchors for Maximum Concrete Holding Power
Wedge anchors are heavy-duty expansion fasteners providing the highest load capacity of any mechanical concrete anchor. A tapered expansion clip at the base expands against drill hole walls as the nut is tightened, creating an extremely strong permanent connection.
Key Features
- Highest mechanical anchor load capacity
- Expansion clip grips concrete permanently
- Stud-style allows bolt replacement
- Multiple diameters for varying loads
- Galvanized and stainless options
Specifications
Material: Carbon steel
galvanized
or stainless | Diameters: 1/4in
3/8in
1/2in
5/8in
3/4in | Lengths: 2-1/4in to 12in | Min concrete: 2x embedment depth
Best For
Post base anchoring to concrete
Hold-down attachment
Steel column base plates
Heavy equipment mounting
Compatible Materials
Solid poured concrete (2000+ PSI)
Solid concrete block
Stone
Pros & Cons
Pros
- ✓ Highest pull-out strength in concrete
- ✓ Permanent tamper-resistant install
- ✓ Can be re-torqued
- ✓ Large diameters for heavy loads
Cons
- ✗ Cannot be removed once expanded
- ✗ Only for solid concrete not hollow block
- ✗ Over-expansion can crack edges
- ✗ Precise hole depth required
Installation Tips
Drill exact specified diameter and depth. Clean dust from hole. Drive through fixture into hole, tighten nut to specified torque to expand clip.
Frequently Asked Questions
Only solid concrete. They will not hold in hollow block because the expansion needs solid material. Use sleeve anchors for hollow block.
Maintain 5-10 anchor diameters from any edge. For 1/2-inch anchor, at least 2-1/2 to 5 inches from edge.