Purchase Concrete Single Expansion Anchors
Technical Information:
The
Single expansion anchor consists of a cone nut and a tubular
shield preassembled into a single unit. The two piece tubular
shield is bound together with a spring band. It contains a
wedge shaped cone nut at one end. Integral lugs on the cone nut keep the wedges from turning in the tubular shield during expansion.
The anchors are made of a precision die-cast zinc alloy commonly known
as Zamak. The expansion action at one end of the anchor distributes
the anchored load throughout the length of the anchor. This
expansion anchor is recommended for shear loads or where the
bolt is subjected to side pressure or vibration. Once fastened,
the object may be unbolted, removed, and/or refastened without affecting the holding values of the anchor.
Single Expansion Anchor concrete anchor/fastener -
Approvals:
Meets GSA Specification FF-S-325, Group II, Type 2, Class 2, Style 1
Single Expansion Anchor concrete anchor/fastener -
Applications:
Light to Medium-duty in concrete, block and brick.
Single Expansion Anchor concrete anchor/fastener -
Installation:
- Using a hammer drill and a carbide tipped masonry bit, drill a hole of recommended diameter (see chart below) into the base material to a depth equal to, or slightly deeper than, the length of the expansion shield.
- Clear the hole of all debris.
- Place the Single Expansion anchor, nut end first, into the hole. The top end of the anchor should be flush or slightly below the base material surface.
- Place the object to be fastened over the anchor in the base material and bolt into place. The bolt should sufficiently engage the threads of the anchor.
Single Expansion Anchor concrete anchor/fastener -
Bolt Length:
The length of the machine bolt required is equal to the thickness of the material to be fastened plus the length
of the single expansion anchor.
Single Expansion Anchor concrete anchor/fastener -
Anchor Spacing:
The forces on a Single expansion anchor are transferred
to the base 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 anchors.
As a rule of thumb, the expansion 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
condition anchor spacing should be increased.
Single Expansion Anchor concrete anchor/fastener -
Technical Data
| |
3000 psi concrete |
| Anchor Size |
Anchor Length |
Hole Size |
Bolt Dia. |
Pull-Out |
| 1/4" |
1-1/4" |
1/2" |
1/4" |
2376 lb. |
| 5/16" |
1-1/2" |
5/8" |
5/16" |
2530 lb. |
| 3/8" |
1-1/2" |
5/8" |
3/8" |
3454 lb. |
| 1/2" |
2-1/16" |
7/8" |
1/2" |
5830 lb. |
| 5/8" |
2-5/8" |
1" |
5/8" |
9724 lb. |
| 3/4" |
2-3/4" |
1-1/4" |
3/4" |
12,496 lb. |
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.