Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 132

Table 30 — Load adjustment factors for 3 / 8-in . diameter threaded rods in uncracked concrete 1 , 2 , 3
3 / 8-in . threaded rods uncracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 4
ƒ AV
┴ Toward edge
ƒ RV
Edge distance in shear
⃦ To and away from edge
ƒ RV
Concrete thickness factor in shear 5
ƒ HV
in . 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2
Embedment
h ef
( mm )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.35
0.26
0.21
0.12
n / a
n / a
n / a
n / a
0.23
0.07
0.05
0.03
0.35
0.14
0.09
0.05
n / a
n / a
n / a
n / a
1-7 / 8
( 48 )
0.58
0.58
0.57
0.54
0.36
0.27
0.22
0.13
0.57
0.53
0.52
0.52
0.25
0.08
0.05
0.03
0.36
0.16
0.10
0.06
n / a
n / a
n / a
n / a
2
( 51 )
0.58
0.58
0.57
0.54
0.37
0.28
0.23
0.13
0.57
0.53
0.52
0.52
0.28
0.09
0.06
0.03
0.37
0.17
0.11
0.06
n / a
n / a
n / a
n / a
3
( 76 )
0.62
0.62
0.61
0.57
0.48
0.34
0.27
0.16
0.61
0.55
0.54
0.52
0.51
0.16
0.10
0.06
0.48
0.32
0.21
0.11
n / a
n / a
n / a
n / a
3-5 / 8
( 92 )
0.65
0.65
0.63
0.58
0.56
0.38
0.30
0.17
0.63
0.56
0.54
0.53
0.68
0.21
0.14
0.07
0.56
0.38
0.27
0.15
0.72
n / a
n / a
n / a
4
( 102 )
0.66
0.66
0.65
0.59
0.62
0.41
0.31
0.18
0.64
0.57
0.55
0.53
0.79
0.24
0.16
0.09
0.62
0.41
0.31
0.17
0.75
n / a
n / a
n / a
4-5 / 8 ( 117 )
0.69
0.69
0.67
0.60
0.71
0.45
0.35
0.20
0.66
0.58
0.56
0.54
0.98
0.30
0.20
0.11
0.71
0.45
0.35
0.20
0.81
0.55
n / a
n / a
5
( 127 )
0.70
0.70
0.69
0.61
0.77
0.48
0.36
0.21
0.68
0.58
0.56
0.54
1.00
0.34
0.22
0.12
0.77
0.48
0.36
0.21
0.84
0.57
n / a
n / a
5-3 / 4 ( 146 )
0.73
0.73
0.71
0.63
0.89
0.55
0.40
0.23
0.70
0.59
0.57
0.55
0.42
0.27
0.15
0.89
0.55
0.40
0.23
0.91
0.61
0.53
n / a
6
( 152 )
0.74
0.74
0.72
0.63
0.92
0.58
0.42
0.24
0.71
0.60
0.57
0.55
0.45
0.29
0.16
0.92
0.58
0.42
0.24
0.92
0.63
0.54
n / a
7
( 178 )
0.78
0.78
0.76
0.66
1.00
0.67
0.48
0.28
0.75
0.61
0.59
0.56
0.57
0.37
0.20
1.00
0.67
0.48
0.28
1.00
0.68
0.58
n / a
8
( 203 )
0.82
0.82
0.80
0.68
0.77
0.55
0.32
0.79
0.63
0.60
0.57
0.69
0.45
0.24
0.77
0.55
0.32
0.72
0.63
n / a
8-3 / 4 ( 222 )
0.86
0.86
0.82
0.69
0.84
0.61
0.35
0.81
0.64
0.61
0.57
0.79
0.51
0.28
0.84
0.61
0.35
0.76
0.65
0.53
9
( 229 )
0.87
0.87
0.83
0.70
0.86
0.62
0.36
0.82
0.65
0.61
0.57
0.83
0.54
0.29
0.86
0.62
0.36
0.77
0.66
0.54
10
( 254 )
0.91
0.91
0.87
0.72
0.96
0.69
0.40
0.86
0.66
0.62
0.58
0.97
0.63
0.34
0.96
0.69
0.40
0.81
0.70
0.57
11
( 279 )
0.95
0.95
0.91
0.74
1.00
0.76
0.44
0.89
0.68
0.63
0.59
1.00
0.72
0.39
1.00
0.76
0.44
0.85
0.73
0.60
12
( 305 )
0.99
0.99
0.94
0.77
0.83
0.48
0.93
0.70
0.65
0.60
0.83
0.45
0.83
0.48
0.88
0.77
0.63
14
( 356 )
1.00
1.00
1.00
0.81
0.97
0.56
1.00
0.73
0.67
0.61
1.00
0.57
0.97
0.56
0.96
0.83
0.68
16
( 406 )
0.86
1.00
0.64
0.76
0.70
0.63
0.69
1.00
0.64
1.00
0.88
0.72
18
( 457 )
0.90
0.72
0.79
0.72
0.65
0.83
0.72
0.94
0.77
24
( 610 )
1.00
0.96
0.89
0.79
0.70
1.00
0.96
1.00
0.88
30
( 762 )
1.00
0.99
0.87
0.74
1.00
0.99
36
( 914 )
1.00
0.94
0.79
1.00
> 48 ( 1219 )
1.00
0.89
Spacing ( s ) / edge distance ( c a ) / concrete thickness ( h ), - in . ( mm )
Table 31 — Load adjustment factors for 3 / 8-in . diameter threaded rods in cracked concrete 1 , 2 , 3
3 / 8-in . threaded rods cracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 4
ƒ AV
┴ Toward edge
ƒ RV
Edge distance in shear
⃦ To and away from edge
ƒ RV
Concrete thickness factor in shear 5
ƒ HV
in . 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2 2-3 / 8 3-3 / 8 4-1 / 2 7-1 / 2
Embedment
h ef
( mm )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
( 60 )
( 86 )
( 114 ) ( 191 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.50
0.50
0.49
0.43
n / a
n / a
n / a
n / a
0.23
0.07
0.06
0.03
0.46
0.15
0.11
0.07
n / a
n / a
n / a
n / a
1-7 / 8
( 48 )
0.58
0.58
0.57
0.54
0.52
0.52
0.50
0.44
0.57
0.53
0.53
0.52
0.26
0.08
0.06
0.04
0.51
0.16
0.12
0.07
n / a
n / a
n / a
n / a
2
( 51 )
0.58
0.58
0.57
0.54
0.53
0.53
0.51
0.44
0.57
0.53
0.53
0.52
0.28
0.09
0.07
0.04
0.53
0.18
0.14
0.08
n / a
n / a
n / a
n / a
3
( 76 )
0.62
0.62
0.61
0.57
0.63
0.63
0.60
0.49
0.61
0.55
0.54
0.53
0.52
0.17
0.12
0.07
0.63
0.33
0.25
0.15
n / a
n / a
n / a
n / a
3-5 / 8
( 92 )
0.65
0.65
0.63
0.58
0.70
0.70
0.66
0.53
0.63
0.56
0.55
0.54
0.69
0.22
0.17
0.10
0.70
0.44
0.33
0.20
0.72
n / a
n / a
n / a
4
( 102 )
0.66
0.66
0.65
0.59
0.74
0.74
0.70
0.55
0.64
0.57
0.56
0.54
0.80
0.26
0.19
0.11
0.74
0.51
0.38
0.23
0.76
n / a
n / a
n / a
4-5 / 8 ( 117 )
0.69
0.69
0.67
0.60
0.81
0.81
0.76
0.58
0.67
0.58
0.56
0.55
0.99
0.32
0.24
0.14
0.81
0.63
0.48
0.29
0.81
0.56
n / a
n / a
5
( 127 )
0.70
0.70
0.69
0.61
0.86
0.86
0.80
0.60
0.68
0.58
0.57
0.55
1.00
0.36
0.27
0.16
0.86
0.71
0.54
0.32
0.85
0.58
n / a
n / a
5-3 / 4 ( 146 )
0.73
0.73
0.71
0.63
0.95
0.95
0.88
0.64
0.71
0.60
0.58
0.56
0.44
0.33
0.20
0.95
0.88
0.66
0.40
0.91
0.62
0.56
n / a
6
( 152 )
0.74
0.74
0.72
0.63
0.98
0.98
0.91
0.66
0.71
0.60
0.58
0.56
0.47
0.35
0.21
0.98
0.94
0.70
0.42
0.93
0.63
0.58
n / a
7
( 178 )
0.78
0.78
0.76
0.66
1.00
1.00
1.00
0.72
0.75
0.62
0.60
0.57
0.59
0.44
0.27
1.00
1.00
0.89
0.53
1.00
0.69
0.62
n / a
8
( 203 )
0.82
0.82
0.80
0.68
0.78
0.79
0.63
0.61
0.58
0.72
0.54
0.32
1.00
0.65
0.73
0.67
n / a
8-3 / 4 ( 222 )
0.86
0.86
0.82
0.69
0.83
0.81
0.65
0.62
0.59
0.83
0.62
0.37
0.74
0.77
0.70
0.59
9
( 229 )
0.87
0.87
0.83
0.70
0.85
0.82
0.65
0.62
0.59
0.86
0.65
0.39
0.78
0.78
0.71
0.60
10
( 254 )
0.91
0.91
0.87
0.72
0.91
0.86
0.67
0.64
0.60
1.00
0.76
0.45
0.91
0.82
0.74
0.63
11
( 279 )
0.95
0.95
0.91
0.74
0.98
0.89
0.68
0.65
0.61
0.87
0.52
0.98
0.86
0.78
0.66
12
( 305 )
0.99
0.99
0.94
0.77
1.00
0.93
0.70
0.67
0.62
1.00
0.60
1.00
0.90
0.82
0.69
14
( 356 )
1.00
1.00
1.00
0.81
1.00
0.73
0.69
0.64
0.75
0.97
0.88
0.74
16
( 406 )
0.86
0.77
0.72
0.66
0.92
1.00
0.94
0.79
18
( 457 )
0.90
0.80
0.75
0.68
1.00
1.00
0.84
24
( 610 )
1.00
0.90
0.83
0.74
0.97
30
( 762 )
1.00
0.92
0.80
1.00
36
( 914 )
1.00
0.85
> 48 ( 1219 )
0.97
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ), - in . ( mm )
1 Linear interpolation not permitted 2 Shaded area with reduced edge distance is permitted provided the installation torque is reduced to 0.30 T max for 5d ≤ s ≤ 16-in . and to 0.5 T max for s > 16-in .
3 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 .
4 Spacing factor reduction in shear applicable when c < 3 * h ef
. ƒ AV , is applicable when edge distance , c < 3 * h ef
. If c ≥ 3 * h ef , then ƒ AV
= ƒ AN .
5 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 .
128
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.3 HIT-RE 500 V3 EPOXY 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