Back to Concrete Machine Screw Anchor
Technical Information:
The machine screw anchor has two parts. The sleeve and the internal threaded cone. The machine screw anchor requires the use of a setting tool. Each diameter machine screw anchor has its own unique setting tool.
Machine Screw Anchor concrete anchor/fastener - Approvals:
Meets G.S.A. Specification FF-S-325, Group
II, Type 2, Class 1.
Machine Screw Anchor concrete anchor/fastener - Applications:
Light to medium duty into concrete, block and brick.
Machine Screw Anchor concrete anchor/fastener - Installation:
- Drill hole the recommended diameter into the base material.
- Clean debris from hole and insert machine screw anchor into hole, threaded cone part first.
- Insert set-tool in to anchor. Using a hammer hit the setting tool, until anchor is set.
- Set fixture over anchor and insert machine threaded
bolt through the fixture and into the anchor.
Machine Screw Anchor concrete anchor/fastener -
Bolt
Length:
Thickness of material to be fastened plus anchor
length equals bolt length.
Machine Screw Anchor concrete anchor/fastener -
Anchor Spacing:
The forces on a Machine Screw Anchor are transferred
to the base material that it is installed in. 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 industry has established
a minimum standard of ten (10) anchor diameters for spacing
between anchors and five (5) anchor diameters from the edge.
When vibration or sudden impact are part of the load conditions,
spacing between anchors should be increased.
Machine Screw Anchor concrete anchor/fastener -
Technical Data
| Anchor Size |
Anchor Length |
Hole Size |
Pull-Out 6000 psi concrete |
| #10 |
5/8" |
3/8" |
1180 lb. |
| 5/16" |
1" |
5/8" |
2200
lb. |
| 1/4" |
7/8" |
1/2" |
1340
lb. |
| 3/8" |
1-1/4" |
3/4" |
2840
lb. |
| 1/2" |
1-1/2" |
7/8" |
3120
lb. |
| 5/8" |
1-3/4" |
1-1/8" |
4940
lb. |
| 3/4" |
2-1/4" |
1-1/4" |
5860
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. Minimum embedment for satisfactory anchor performance
is 4-1/2 bolt diameters. Deeper embedments will yield higher
tension and shear capacity
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