Technical Specifications — Drop-in Anchors
There are a number of technical specifications that must be considered when working with drop-in anchors. Concrete anchor diameter, internal thread length, minimum edge distance, and hole size are all important factors to consider before starting any anchoring project. This specific type of fastener is perfect when dealing with flush mounting. Drop-in anchor descriptions refer to internal female threads standard UNC threaded rod or bolts. Click on the Ultimate Holding Values chart below for more technical specifications.
Drop-in Anchor Ultimate Holding Values –CONCRETE**
| 1/4 |
3/8 |
1 |
5 |
939 |
1622 |
2067 |
2750 |
| 3/8 |
1/2 |
1-9/16 |
10 |
1560 |
2911 |
3995 |
5169 |
| 1/2 |
5/8 |
2 |
20 |
3105 |
4605 |
4110 |
7444 |
| 5/8 |
7/8 |
2-1/2 |
40 |
3323 |
7547 |
5750 |
12212 |
| 3/4 |
1 |
3-1/8 |
80 |
6678 |
12214 |
10807 |
14223 |
** 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.
| DI14 |
DIS14 |
100/1000 |
1/4 |
1 |
1/2 |
3-1/2" |
1-3/4" |
| DI38 |
DIS38 |
50/1000 |
3/8 |
1-9/16 |
5/8 |
5-11/16" |
2-13/16" |
| DI12 |
DIS12 |
50/500 |
1/2 |
2 |
3/4 |
7" |
3-1/2" |
| DI58 |
DIS58 |
25/200 |
5/8 |
2-1/2 |
1 |
8-5/16" |
4-1/8" |
| DI34 |
DIS34 |
25/150 |
3/4 |
3-1/8 |
1-1/4 |
10-1/2" |
5-1/4" |