Technical Specifications — Wedge Anchors
Before installing wedge anchors, certain technical specifications should be considered to make certain these concrete fasteners are installed correctly and safely. Thunderstud anchors come in a variety of anchor diameters, lengths, and thread lengths. Wedge Anchors are available in three materials: zinc plated carbon steel, hot-dipped galvanized, and stainless steel. Wedge anchors should be used in solid concrete only.
Wedge Anchor Length:
Thickness of material to be fastened, plus minimum embedment, plus the thickness of the nut and washer equals minimum wedge anchor length.
Wedge Anchor Spacing:
The forces on a Wedge 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 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 any unsupported edge. When vibration or sudden impact are part of the load conditions, spacing between anchors should be increased.
Wedge Anchor Ultimate Holding Values**
| |
|
|
1-1/8 |
1170 |
1443 |
1771 |
1813 |
| 1/4 |
1-1/8 |
5-10 |
1-3/4 |
1841 |
1443 |
2408 |
1813 |
| |
|
|
2-3/4 |
1975 |
1443 |
2748 |
1813 |
| |
|
|
1-1/4 |
1308 |
2110 |
2399 |
2033 |
| 5/16 |
1-1/8 |
5-10 |
2 |
1882 |
2110 |
2787 |
2033 |
| |
|
|
2-1/4 |
1905 |
2110 |
2810 |
2033 |
| |
|
|
1-1/2 |
1631 |
4318 |
3636 |
5121 |
| 3/8 |
1-1/2 |
25-30 |
3 |
3229 |
4318 |
5653 |
5121 |
| |
|
|
5 |
4075 |
4318 |
6328 |
5121 |
| |
|
|
2-1/4 |
3999 |
7419 |
6714 |
9377 |
| 1/2 |
2-1/4 |
50-60 |
4 |
6336 |
7419 |
8942 |
9377 |
| |
|
|
6 |
6902 |
7419 |
10175 |
9377 |
| |
|
|
3-3/4 |
4999 |
8264 |
8747 |
12928 |
| 5/8 |
2-3/4 |
75-90 |
5 |
8854 |
8264 |
15590 |
12928 |
| |
|
|
7 |
9381 |
8264 |
16710 |
12928 |
| |
|
|
3-1/4 |
6638 |
12504 |
11314 |
17050 |
| 3/4 |
3-1/4 |
150-175 |
6 |
10084 |
12504 |
18408 |
17050 |
| |
|
|
8 |
11170 |
12504 |
19805 |
17050 |
| |
|
|
3-7/8 |
8392 |
18250 |
16354 |
20234 |
| 7/8 |
3-7/8 |
200-250 |
5-3/4 |
12064 |
18250 |
18250 |
20234 |
| |
|
|
8-3/4 |
12784 |
18250 |
16850 |
20234 |
| |
|
|
4-1/2 |
9773 |
23617 |
18250 |
27605 |
| 1 |
4-1/2 |
250-300 |
7-1/2 |
11890 |
23617 |
26726 |
27605 |
| |
|
|
10 |
15590 |
23617 |
30491 |
27605 |
| |
|
|
5-1/2 |
17550 |
32275 |
22971 |
42690 |
| 1-1/4 |
5-1/2 |
400-450 |
7 |
21050 |
32275 |
27845 |
42690 |
| |
|
|
10 |
27893 |
32275 |
34788 |
42690 |
**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.
| WA14134 |
N/A |
WAS14134 |
1/4 |
1-3/4 |
3/4 |
1-1/8 |
5-10 |
| WA14214 |
N/A |
WAS14214 |
1/4 |
2-1/4 |
3/4 - 1 |
1-1/8 |
5-10 |
| WA143 |
N/A |
WAS143 |
1/4 |
3 |
3/4 - 2-1/8 |
1-1/8 |
5-10 |
| WA14314 |
N/A |
WAS14314 |
1/4 |
3-1/4 |
3/4 - 2-1/8 |
1-1/8 |
5-10 |
| WA516234 |
WAG516234 |
WAS516234 |
5/16 |
2-3/4 |
1-1/2 |
1-1/8 |
5-10 |
| WA516312 |
WAG516312 |
WAS516312 |
5/16 |
3-1/2 |
1-1/2 - 2-1/4 |
1-1/8 |
5-10 |
| WA38214 |
WAG38214 |
WAS38214 |
3/8 |
2-1/4 |
7/8 |
1-1/2 |
25-30 |
| WA38234 |
WAG38234 |
WAS38234 |
3/8 |
2-3/4 |
1-1/8 - 1-1/2 |
1-1/2 |
25-30 |
| WA383 |
WAG383 |
WAS383 |
3/8 |
3 |
1-1/8 -1-1/2 |
1-1/2 |
25-30 |
| WA38312 |
WAG38312 |
WAS38312 |
3/8 |
3-1/2 |
1-1/8 - 2-1/4 |
1-1/2 |
25-30 |
| WA38334 |
WAG38334 |
WAS38334 |
3/8 |
3-3/4 |
1-1/8 - 2-1/2 |
1-1/2 |
25-30 |
| WA385 |
WAG385 |
WAS385 |
3/8 |
5 |
1-1/8 - 3-1/2 |
1-1/2 |
25-30 |
| WA38612 |
WAG38612 |
WAS38612 |
3/8 |
6-1/2 |
1-1/8 - 4-1/4 |
1-1/2 |
25-30 |
| WA12234 |
WAG12234 |
WAS12234 |
1/2 |
2-3/4 |
2-1/4 |
2-1/4 |
50-60 |
| WA12334 |
WAG12334 |
WAS12334 |
1/2 |
3-3/4 |
2-1/4 |
2-1/4 |
50-60 |
| WA12414 |
WAG12414 |
WAS12414 |
1/2 |
4-1/4 |
2-1/4 -2-3/4 |
2-1/4 |
50-60 |
| WA12512 |
WAG12512 |
WAS12512 |
1/2 |
5-1/2 |
2-1/4 - 3-3/4 |
2-1/4 |
50-60 |
| WA127 |
WAG127 |
WAS127 |
1/2 |
7 |
2-1/4 - 4 |
2-1/4 |
50-60 |
| WA12812 |
WAG12812 |
WAS12812 |
1/2 |
8-1/2 |
2-1/4 - 4 |
2-1/4 |
50-60 |
| WA1210 |
WAG1210 |
WAS1210 |
1/2 |
10 |
2-1/4 - 4 |
2-1/4 |
50-60 |
| WA1212 |
WAG1212 |
WAS1212 |
1/2 |
12 |
2-1/4 - 4 |
2-1/4 |
50-60 |
| WA58312 |
WAG58312 |
WAS58312 |
5/8 |
3-1/2 |
1-1/8 - 1-3/4 |
2-3/4 |
75-90 |
| WA58412 |
WAG58412 |
WAS58412 |
5/8 |
4-1/2 |
2-1/4 |
2-3/4 |
75-90 |
| WA585 |
WAG585 |
WAS585 |
5/8 |
5 |
2-3/4 |
2-3/4 |
75-90 |
| WA586 |
WAG586 |
WAS586 |
5/8 |
6 |
2-3/4 - 4 |
2-3/4 |
75-90 |
| WA587 |
WAG587 |
WAS587 |
5/8 |
7 |
2-3/4 - 4 |
2-3/4 |
75-90 |
| WA58812 |
WAG58812 |
WAS58812 |
5/8 |
8-1/2 |
2-3/4 - 4 |
2-3/4 |
75-90 |
| WA5810 |
WAG5810 |
WAS5810 |
5/8 |
10 |
2-3/4 -4 |
2-3/4 |
75-90 |
| WA5812 |
WAG5812 |
WAS5812 |
5/8 |
12 |
2-3/4 - 4 |
2-3/4 |
75-90 |
| WA34414 |
WAG34414 |
WAS34414 |
3/4 |
4-1/4 |
1-3/4 |
3-1/4 |
150-175 |
| WA34434 |
WAG34434 |
WAS34434 |
3/4 |
4-3/4 |
2-1/4 |
3-1/4 |
150-175 |
| WA34512 |
WAG34512 |
WAS34512 |
3/4 |
5-1/2 |
3 |
3-1/4 |
150-175 |
| WA34614 |
WAG34614 |
WAS34614 |
3/4 |
6-1/4 |
3-1/4 - 4 |
3-1/4 |
150-175 |
| WA347 |
WAG347 |
WAS347 |
3/4 |
7 |
3-1/4 - 4 |
3-1/4 |
150-175 |
| WA34812 |
WAG34812 |
WAS34812 |
3/4 |
8-1/2 |
3-1/4 - 4 |
3-1/4 |
150-175 |
| WA3410 |
WAG3410 |
WAS3410 |
3/4 |
10 |
3-1/4 - 4 |
3-1/4 |
150-175 |
| WA3412 |
WAG3412 |
WAS3412 |
3/4 |
12 |
3-1/4 - 4 |
3-1/4 |
150-175 |
| WA786 |
WAG786 |
WAS786 |
7/8 |
6 |
3 |
3-7/8 |
200-250 |
| WA788 |
WAG788 |
WAS788 |
7/8 |
8 |
2-1/4 - 4 |
3-7/8 |
200-250 |
| WA7810 |
WAG7810 |
WAS7810 |
7/8 |
10 |
2-1/4 - 4 |
3-7/8 |
200-250 |
| WA7812 |
WAG7812 |
WAS7812 |
7/8 |
12 |
2-1/4 - 4 |
3-7/8 |
200-250 |
| WA16 |
WAG16 |
WAS16 |
1 |
6 |
3 |
4-1/2 |
250-300 |
| WA19 |
WAG19 |
WAS19 |
1 |
9 |
4 |
4-1/2 |
250-300 |
| WA112 |
WAG112 |
WAS112 |
1 |
12 |
4 |
4-1/2 |
250-300 |
| WA1149 |
WAG1149 |
WAS1149 |
1-1/4 |
9 |
4 |
5-1/2 |
400-450 |
| WA11412 |
WAG11412 |
WAS11412 |
1-1/4 |
12 |
4 |
5-1/2 |
400-450 |