Bottom Bearing
Expander plug bears against hole bottom.
Expansion Principles
- Hole Depth Is Critical
- Remove Concrete Residue From Hole
- Concrete Bearing Thickness
3 Anchor Diameters - Anchor Types
- Self-Drilling Anchor
- Non-Drilling Anchor
- Stud Anchor
Side Bearing
Lateral expansion against hole sides.
- Hole Depth Not Critical – Over-Drill
- Concrete: Thickness Below Hole Not Critical
- Hole Diameter Is Critical – Ans I 94.12-77
- Anchor Types
- Wedge Anchor
- Sleeve Anchor
- Drop-In Anchor
Influencing Factors
Relationship Of Concrete To Anchor
- Concrete Is The Working Medium For Anchor Installation
- Concrete Basically Controls Anchor Effectiveness
Concrete Compressive Strength
- Aggregate Size & Type
- Standard Concrete vs Lightweight Structural Concrete
- Performance Curves For Tension & Shear Based On Concrete Strength
Anchor Diameter
- Performance Increases When Diameter Increases
Embedment Depth
- Minimum: 4 1/2 To 5 Anchor Diameters
- Increased Depth Improves Performance
- Concrete Shear Cone vs Embedment Depth
Age Of Concrete
- Minimum Recommended = 28 Days, Cured
Typical Performances
Internally Threaded – Female -Flush Type Anchor
| Bolt Size | Drill Bit Size | Thread Depth | Min. Hole Depth | Pullout Lbs. | Shear Lbs. |
|---|---|---|---|---|---|
| 0.5" - 13 | 0.63" | 0.75" | 2" | 8544 | 6502 |
Ultimate Load Capacity In 4300 psi. stone aggregate concrete (reduce by 30% for lightweight aggregate concrete)
Safe working loads under static loading should not exceed 25% of ultimate load.
Externally Threaded – Male-Stud Type Anchor
| Bolt Size | Overall Length A | Max. Material Thickness B | Thread Length C | Min. Embeded D | Pullout Lbs. | Shear Lbs. |
|---|---|---|---|---|---|---|
| 0.38" - 16 | 2.75" | 0.63" | 1.13" | 1.75" | 5094 | 5233 |
| 0.5" - 13 | 4.25" | 1.63" | 1.31" | 2.13" | 6310 | 9016 |
| 0.63" - 11 | 5" | 1.75" | 1.75" | 2.63" | 8322 | 12216 |
Expansion Anchor Characteristics
Externally Threaded - Male Stud Type
Installation Procedures
Wedge Anchor (Concrete)
- Hole size is bolt size
- Wide selection of sizes
- One piece expander clip
- Available in many materials
Sleeve Anchor
(Concrete & Masonry Block)
- Wide range of versatility:
anchor length & head styles - Hole size is anchor size
- Expander sleeve
Stud Anchor
(Concrete)
- Anchor size is hole size
- Bottom bearing design permits jacking & leveling
- Extra thread length
Expansion Anchor Characteristics
Internally Threaded - Female-Flush Type
Installation Procedures
Self Drilling Anchor
(Concrete)
- Drills its own hole – Accurate Hole Size
- Shell is AISI·12L14 Steel – Heat treated, Case Hardened
- Plug is AISI·1010 Steel – Heat treated, Case Carburized
- Electro-deposited, zinc plated
Non-Drilling Anchor
(Concrete)
- Drop-in Anchor – Versatile installation
- Performance & Expansion similar to self drill
- Electro-deposited zinc plating
Setting Tool
Drop-In Anchor
(Concrete)
- Drop-in anchor·-·Hole depth not critical
- Factory assembled internal expander plug
- Design features provide: Excellent performance, Small hole diameter, & Finished appearance
- Available in Type 303 Stainless Steel – Standard
Setting Tool
