Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 242

Table 7 — Load adjustment factors for 3 / 8 , 1 / 2 , 5 / 8 , and 3 / 4-in . diameter threaded rods in uncracked concrete 1 , 2
3 / 8 , 1 / 2 , 5 / 8 & 3 / 4-in . threaded rods uncracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in
3 shear ƒ AV
Edge distance in shear
┴ Toward edge
ƒ RV
‖ To edge
ƒ RV
Concrete thickness
4 factor in shear
Thread size , in . 3 / 8 1 / 2 5 / 8 3 / 4 3 / 8 1 / 2 5 / 8 3 / 4 3 / 8 1 / 2 5 / 8 3 / 4 3 / 8 1 / 2 5 / 8 3 / 4 3 / 8 1 / 2 5 / 8 3 / 4 3 / 8 1 / 2 5 / 8 3 / 4
Embedment
in .
3-1 / 2 4-1 / 4
5
6-5 / 8 3-1 / 2 4-1 / 4
5
6-5 / 8 3-1 / 2 4-1 / 4
5
6-5 / 8 3-1 / 2 4-1 / 4
5
6-5 / 8 3-1 / 2 4-1 / 4
5
6-5 / 8 3-1 / 2 4-1 / 4
5
6-5 / 8
h ef
( mm )
( 89 ) ( 108 ) ( 127 ) ( 168 ) ( 89 ) ( 108 ) ( 127 ) ( 168 ) ( 89 ) ( 108 ) ( 127 ) ( 168 ) ( 89 ) ( 108 ) ( 127 ) ( 168 ) ( 89 ) ( 108 ) ( 127 ) ( 168 ) ( 89 ) ( 108 ) ( 127 ) ( 168 )
Spacing ( s ) / edge distance ( c a ) / concrete thickness ( h ), - in ( mm )
1-7 / 8
( 48 )
0.59
n / a
n / a
n / a
0.30
n / a
n / a
n / a
0.53
n / a
n / a
n / a
0.10
n / a
n / a
n / a
0.19
n / a
n / a
n / a
n / a
n / a
n / a
n / a
2
( 51 )
0.60
n / a
n / a
n / a
0.31
n / a
n / a
n / a
0.54
n / a
n / a
n / a
0.11
n / a
n / a
n / a
0.21
n / a
n / a
n / a
n / a
n / a
n / a
n / a
2-1 / 2
( 64 )
0.62 0.58
n / a
n / a
0.35 0.29
n / a
n / a
0.55 0.54
n / a
n / a
0.15
0.10
n / a
n / a
0.30 0.20
n / a
0.54
n / a
n / a
n / a
n / a
3
( 76 )
0.64 0.60
n / a
n / a
0.38 0.31
n / a
n / a
0.56 0.54
n / a
n / a
0.19
0.13
n / a
n / a
0.38 0.26
n / a
0.54
n / a
n / a
n / a
n / a
3-1 / 8
( 79 )
0.65 0.60 0.58
n / a
0.39 0.32 0.31
n / a
0.56 0.54 0.54
n / a
0.21 0.14
0.12
n / a
0.39 0.28 0.24 0.54
n / a
n / a
n / a
n / a
3-1 / 4
( 83 )
0.65 0.61 0.59 0.57 0.40 0.33 0.32 0.29 0.56 0.55 0.54 0.53 0.22 0.15
0.13 0.09 0.40 0.29 0.26 0.18
n / a
n / a
n / a
n / a
4
( 102 )
0.69 0.63 0.61 0.59 0.46 0.37 0.35 0.31 0.57 0.56 0.55 0.54 0.30 0.20 0.18
0.12 0.46 0.37 0.35 0.25
n / a
n / a
n / a
n / a
4-3 / 4
( 121 )
0.73 0.66 0.63 0.61 0.53 0.41 0.39 0.34 0.59 0.57 0.56 0.55 0.39 0.26 0.23 0.16 0.53 0.41 0.39 0.32 0.60
n / a
n / a
n / a
5
( 127 )
0.74 0.67 0.63 0.61 0.55 0.42 0.40 0.35 0.59 0.57 0.57 0.55 0.42 0.28 0.24 0.17 0.55 0.42 0.40 0.34 0.61
n / a
n / a
n / a
5-1 / 2
( 140 )
0.76 0.68 0.65 0.62 0.61 0.45 0.43 0.36 0.60 0.58 0.57 0.56 0.48 0.32 0.28 0.20 0.61 0.45 0.43 0.36 0.64 0.56
n / a
n / a
6
( 152 )
0.79 0.70 0.66 0.63 0.66 0.48 0.45 0.38 0.61 0.59 0.58 0.56 0.55 0.37 0.32 0.23 0.66 0.48 0.45 0.38 0.67 0.58
n / a
n / a
6-3 / 8
( 162 )
0.80 0.71 0.67 0.64 0.70 0.51 0.47 0.40 0.62 0.59 0.58 0.57 0.60 0.40 0.35 0.25 0.70 0.51 0.47 0.40 0.69 0.60 0.58
n / a
7
( 178 )
0.83 0.73 0.69 0.66 0.77 0.56 0.51 0.42 0.63 0.60 0.59 0.57 0.69 0.46 0.41 0.29 0.77 0.56 0.51 0.42 0.72 0.63 0.60
n / a
8
( 203 )
0.88 0.77 0.71 0.68 0.88 0.64 0.57 0.46 0.65 0.61 0.60 0.58 0.85 0.57 0.50 0.35 0.88 0.64 0.57 0.46 0.77 0.68 0.65
n / a
8-3 / 8
( 213 )
0.90 0.78 0.72 0.69 0.92 0.67 0.60 0.48 0.66 0.62 0.61 0.59 0.91 0.61 0.53 0.37 0.92 0.67 0.60 0.48 0.79 0.69 0.66 0.59
10
( 254 )
0.98 0.84 0.77 0.72 1.00 0.80 0.71 0.54 0.69 0.64 0.63 0.60 1.00 0.79 0.69 0.49 1.00 0.80 0.71 0.54 0.86 0.75 0.72 0.64
12
( 305 )
1.00 0.90 0.82 0.77
0.96 0.85 0.65 0.72 0.67 0.66 0.62
1.00 0.91 0.64
0.96 0.85 0.65 0.95 0.83 0.79 0.70
14
( 356 )
0.97 0.88 0.81
1.00 1.00 0.76 0.76 0.70 0.68 0.64
1.00 0.81
1.00 1.00 0.76 1.00 0.89 0.85 0.76
16
( 406 )
1.00 0.93 0.86
0.87 0.80 0.73 0.71 0.67
0.99
0.87
0.95 0.91 0.81
18
( 457 )
0.98 0.90
0.98 0.84 0.76 0.73 0.69
1.00
0.98
1.00 0.97 0.86
24
( 610 )
1.00 1.00
1.00 0.95 0.84 0.81 0.75
1.00
1.00 1.00
30
( 762 )
1.00 0.93 0.89 0.81
36
( 914 )
1.00 0.97 0.87
> 48
( 1219 )
1.00 1.00
ƒ HV
Table 8 — Load adjustment factors for 1 / 2 , 5 / 8 , and 3 / 4-in . diameter threaded rods in cracked concrete 1 , 2
1 / 2 , 5 / 8 & 3 / 4-in . threaded rods cracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in
3 shear ƒ AV
Edge distance in shear
┴ Toward edge
ƒ RV
‖ To edge
ƒ RV
Concrete thickness
4 factor in shear
Thread size , in . 1 / 2 5 / 8 3 / 4 1 / 2 5 / 8 3 / 4 1 / 2 5 / 8 3 / 4 1 / 2 5 / 8 3 / 4 1 / 2 5 / 8 3 / 4 1 / 2 5 / 8 3 / 4 Embedment h ef in . 4-1 / 4 5 6-5 / 8 4-1 / 4 5 6-5 / 8 4-1 / 4 5 6-5 / 8 4-1 / 4 5 6-5 / 8 4-1 / 4 5 6-5 / 8 4-1 / 4 5 6-5 / 8 ( mm ) ( 108 ) ( 127 ) ( 168 ) ( 108 ) ( 127 ) ( 168 ) ( 108 ) ( 127 ) ( 168 ) ( 108 ) ( 127 ) ( 168 ) ( 108 ) ( 127 ) ( 168 ) ( 108 ) ( 127 ) ( 168 )
2-1 / 2
( 64 )
0.58
n / a
n / a
0.53
n / a
n / a
0.54
n / a
n / a
0.11
n / a
n / a
0.21
n / a
n / a
n / a
n / a
n / a
3
( 76 )
0.60
n / a
n / a
0.58
n / a
n / a
0.54
n / a
n / a
0.14
n / a
n / a
0.28
n / a
n / a
n / a
n / a
n / a
3-1 / 8
( 79 )
0.60
0.58
n / a
0.59
0.53
n / a
0.55
0.54
n / a
0.15
0.12
n / a
0.29
0.24
n / a
n / a
n / a
n / a
3-1 / 4
( 83 )
0.61
0.59
0.57
0.60
0.54
0.51
0.55
0.54
0.53
0.16
0.13
0.09
0.31
0.26
0.18
n / a
n / a
n / a
4
( 102 )
0.63
0.61
0.59
0.66
0.59
0.55
0.56
0.55
0.54
0.21
0.18
0.12
0.43
0.35
0.25
n / a
n / a
n / a
4-3 / 4
( 121 )
0.66
0.63
0.61
0.73
0.64
0.59
0.57
0.56
0.55
0.28
0.23
0.16
0.55
0.46
0.32
n / a
n / a
n / a
5
( 127 )
0.67
0.63
0.61
0.75
0.66
0.60
0.57
0.57
0.55
0.30
0.25
0.17
0.60
0.49
0.35
n / a
n / a
n / a
5-1 / 2
( 140 )
0.68
0.65
0.62
0.80
0.70
0.63
0.58
0.57
0.56
0.34
0.28
0.20
0.69
0.57
0.40
0.57
n / a
n / a
6
( 152 )
0.70
0.66
0.63
0.85
0.73
0.66
0.59
0.58
0.56
0.39
0.32
0.23
0.78
0.65
0.46
0.60
n / a
n / a
6-3 / 8
( 162 )
0.71
0.67
0.64
0.89
0.76
0.68
0.59
0.58
0.57
0.43
0.36
0.25
0.86
0.71
0.50
0.62
0.58
n / a
7
( 178 )
0.73
0.69
0.66
0.95
0.81
0.72
0.60
0.59
0.57
0.49
0.41
0.29
0.95
0.81
0.57
0.65
0.61
n / a
8
( 203 )
0.77
0.71
0.68
1.00
0.89
0.78
0.62
0.60
0.58
0.60
0.50
0.35
1.00
0.89
0.70
0.69
0.65
n / a
8-3 / 8
( 213 )
0.78
0.72
0.69
0.92
0.81
0.62
0.61
0.59
0.65
0.53
0.38
0.92
0.75
0.71
0.66
0.59
10
( 254 )
0.84
0.77
0.72
1.00
0.92
0.65
0.63
0.60
0.84
0.70
0.49
1.00
0.92
0.77
0.72
0.64
12
( 305 )
0.90
0.82
0.77
1.00
0.68
0.66
0.62
1.00
0.92
0.65
1.00
0.84
0.79
0.71
14
( 356 )
0.97
0.88
0.81
0.71
0.68
0.65
1.00
0.81
0.91
0.86
0.76
16
( 406 )
1.00
0.93
0.86
0.74
0.71
0.67
0.99
0.98
0.92
0.81
18
( 457 )
0.98
0.90
0.77
0.74
0.69
1.00
1.00
0.97
0.86
24
( 610 )
1.00
1.00
0.86
0.81
0.75
1.00
1.00
30
( 762 )
0.95
0.89
0.81
36
( 914 )
1.00
0.97
0.87
> 48
( 1219 )
1.00
1.00
1 Linear interpolation not permitted .
2 When combining multiple load adjustment factors ( e . g . for a four-anchor pattern in a corner with thin concrete member ) the design can become very
conservative . To optimize the design , use PROFIS Engineering or perform anchor calculation using design equations from ACI 318 Chapter 17 .
3 Spacing factor reduction in shear , ƒ AV , is applicable when edge distance c < 3 * h ef
. If c ≥ 3 * h ef , then ƒ AV
= ƒ AN .
4 Concrete thickness reduction factor in shear , ƒ HV , is applicable when edge distance c < 3 * h ef
. If c ≥ 3 * h ef , then ƒ HV
= 1.0 .
Spacing ( s ) / edge distance ( c a ) / concrete thickness ( h ), - in ( mm ) ƒ HV
238 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.6 HVU2 CAPSULE ADHESIVE ANCHORING SYSTEM 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