Technical Specifications
Before installing a machine screw anchor, numerous technical specifications should be considered to ensure the correct anchor size and thread type is used. Machine screws are used in light to medium duty applications with dead loads. The description refers to the size of the machine-threaded bolt that goes into the fastener. Minimum embedment of machine screw anchors ranges from 5/8 in to 2-1/4 inches.
ULTIMATE HOLDING VALUES - CONCRETE*
| #10 |
5/8 |
10-24 |
3/8 |
5/8 |
950 |
100 |
| 1/4 |
7/8 |
1/4-20 |
1/2 |
7/8 |
2120 |
100 |
| 5/16 |
1 |
5/16-18 |
5/8 |
1 |
2400 |
100 |
| 3/8 |
1-1/4 |
3/8-16 |
3/4 |
1-1/4 |
5250 |
50 |
| 1/2 |
1-1/2 |
1/2-13 |
7/8 |
1-1/2 |
6080 |
25 |
| 5/8 |
1-3/4 |
5/8-11 |
1-1/8 |
1-3/4 |
7000 |
25 |
| 3/4 |
2-1/4 |
3/4 -10 |
1-1/4 |
2-1/4 |
8000 |
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. *Tested by ATEC in accordance
with ASTM E488-90 and ICBO Minimum embedment for satisfactory anchor performance is 4-1/2 bolt diameters. Deeper embedment will
yield higher tension and shear capacity.