Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 281

Anchor Fastening Technical Guide , Edition 22
Table 5 — Edge distance , spacing and member thickness requirements 1
Nominal anchor diameter
Condition Dimensional parameter Symbol Units M8 M10 M12 M16 M20 M24
Minimum concrete thickness h min in . ( mm )
4-3 / 4 ( 120 )
5-1 / 2 ( 140 )
6-1 / 4 ( 160 )
7-7 / 8 ( 200 )
9-7 / 8 ( 250 )
11-7 / 8 ( 300 )
Critical edge distance c ac in . ( mm )
4-3 / 8 ( 110 )
4-3 / 8 ( 110 )
4-3 / 4 ( 120 )
5-7 / 8 ( 150 )
8-7 / 8 ( 225 )
8-7 / 8 ( 225 )
A
Case 1
Minimum edge distance c min , 1 in . ( mm )
Minimum anchor spacing s min , 1 in . ( mm )
2-3 / 8 ( 60 )
5-1 / 2 ( 140 )
2-3 / 4 ( 70 )
9-1 / 2 ( 240 )
3-1 / 2 ( 90 )
11 ( 280 )
4-3 / 4 ( 120 )
12-5 / 8 ( 320 )
5 ( 125 )
13-3 / 4 ( 350 )
5-7 / 8 ( 150 )
11-7 / 8 ( 300 )
Case 2
Minimum edge distance c min , 2 in . ( mm )
Minimum anchor spacing s min , 2 in . ( mm )
3-3 / 8 ( 85 )
2-3 / 8 ( 60 )
5 ( 125 )
2-3 / 4 ( 70 )
6-1 / 8 ( 155 )
3-1 / 8 ( 80 )
7-7 / 8 ( 200 )
4 ( 100 )
8-1 / 4 ( 210 )
5 ( 125 )
8-1 / 4 ( 210 )
5-7 / 8 ( 150 )
Minimum concrete thickness h min in . ( mm )
Critical edge distance c ac in . ( mm )
4-3 / 8 ( 110 )
5-7 / 8 ( 150 )
4-3 / 4 ( 120 )
6-7 / 8 ( 175 )
5-3 / 8 ( 135 )
7-7 / 8 ( 200 )
6-1 / 4 ( 160 )
9-7 / 8 ( 250 )
7-1 / 2 ( 190 )
12-3 / 8 ( 312 . 5 )
8-7 / 8 ( 225 )
14-3 / 4 ( 375 )
3.3.2
B
Case 1
Minimum edge distance c min , 1 in . ( mm )
Minimum anchor spacing s min , 1 in . ( mm )
2-3 / 8 ( 60 )
7 ( 180 )
3-1 / 2 ( 90 )
10-1 / 4 ( 260 )
4-3 / 8 ( 110 )
12-5 / 8 ( 320 )
6-1 / 4 ( 160 )
15 ( 380 )
7-7 / 8 ( 200 )
15-3 / 4 ( 400 )
8-7 / 8 ( 225 )
15 ( 380 )
Case 2
Minimum edge distance c min , 2 in . ( mm )
Minimum anchor spacing s min , 2 in . ( mm )
4 ( 100 )
2-3 / 8 ( 60 )
6-1 / 4 ( 160 )
2-3 / 4 ( 70 )
7-7 / 8 ( 200 )
3-1 / 8 ( 80 )
10-5 / 8 ( 270 )
4 ( 100 )
11-7 / 8 ( 300 )
5 ( 125 )
12-5 / 8 ( 320 )
5-7 / 8 ( 150 )
1 Linear interpolation is permitted to establish an edge distance and spacing combination between Case 1 and Case 2 . Linear interpolation for a specific edge distance c , where c min , 1
< c < c min , 2 will determine the permissible spacing s as follows :
( S min , 1
– S min , 2 S ≥ S min , 2 + C – C min , 2
C min , 1
– C min , 2
(
) ( )
)
Figure 2
For a specific edge distance , the permitted spacing is calculated as follows :
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.2 HSL4 HEAVY-DUTY EXPANSION ANCHORS Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458
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