Technical Specifications - Single Expansion Anchors
There are numerous technical specifications that must be considered when using Single Expansion Anchors. Considerations include: Single Expansion Anchor diameter, bolt diameter and required hole size. The Single Expansion Anchor is a great fastener when working with soft masonry or base materials of questionable strength. The size of the Single Expansion Anchor refers to the diameter of the machine bolt/screw used to expand this anchor. Once all of these factors have been determined, you can find the expected holding values in the technical information below.
Single Expansion Anchor Bolt Length:
To determine the length of machine bolt required, add the thickness of the material to be fastened plus the length of the single expansion anchor.
Single Expansion Anchor Spacing:
The forces on a Single Expansion Anchor are transferred to the material in which it is installed. If the anchors are installed too close together, it can cause an interaction of the forces, thus reducing the holding power of the anchor. As a rule of thumb, the expansion anchor industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from an unsupported edge. When vibration or sudden impact are part of the load conditions, the spacing should be increased.
Ultimate Holding Values – CONCRETE**
| 1/4-20 |
1-5/16 |
1/2 |
2,376 |
SE14 |
100 |
| 5/16-18 |
1-1/2 |
5/8 |
2,530 |
SE516 |
100 |
| 3/8-16 |
1-1/2 |
5/8 |
3,454 |
SE38 |
50 |
| 1/2-13 |
2-3/16 |
7/8 |
5,830 |
SE12 |
25 |
| 5/8-11 |
3 |
1 |
9,724 |
SE58 |
25 |
| 3/4-10 |
4 |
1-1/4 |
12,496 |
SE34 |
25 |
*Values shown are average ultimate values and are offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally
accepted as a safe working load. Reference should be made to applicable codes for the specific working ratio. All values are based on close-tolerance holes drilled with carbide tipped drill bits. Designated holding power depends on the quality of the masonry material, depth of embedment, and proper hole size.