Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 66

Table 44 — Load adjustment factors for 1 / 2-in . diameter threaded rods in uncracked concrete 1 , 2 , 3
1 / 2-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
Embedment
in .
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
h ef
( mm )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.34
0.25
0.19
0.11
n / a
n / a
n / a
n / a
0.10
0.05
0.03
0.02
0.21
0.11
0.07
0.03
n / a
n / a
n / a
n / a
2-1 / 2
( 64 )
0.58
0.58
0.57
0.54
0.41
0.28
0.22
0.13
0.55
0.53
0.53
0.52
0.18
0.09
0.06
0.03
0.35
0.18
0.12
0.06
n / a
n / a
n / a
n / a
3
( 76 )
0.60
0.60
0.58
0.55
0.46
0.30
0.24
0.14
0.56
0.54
0.53
0.52
0.23
0.12
0.08
0.04
0.46
0.24
0.15
0.08
n / a
n / a
n / a
n / a
4
( 102 )
0.63
0.63
0.61
0.57
0.57
0.35
0.27
0.16
0.58
0.55
0.54
0.53
0.36
0.18
0.12
0.06
0.57
0.35
0.24
0.12
0.58
n / a
n / a
n / a
5
( 127 )
0.67
0.67
0.64
0.58
0.71
0.41
0.31
0.18
0.60
0.57
0.55
0.53
0.50
0.26
0.17
0.08
0.71
0.41
0.31
0.17
0.65
n / a
n / a
n / a
5-3 / 4
( 146 )
0.69
0.69
0.66
0.60
0.81
0.45
0.34
0.20
0.62
0.58
0.56
0.54
0.61
0.32
0.21
0.10
0.81
0.45
0.34
0.20
0.69
0.56
n / a
n / a
6
( 152 )
0.70
0.70
0.67
0.60
0.85
0.46
0.35
0.20
0.63
0.58
0.56
0.54
0.65
0.34
0.22
0.11
0.85
0.46
0.35
0.20
0.71
0.57
n / a
n / a
7
( 178 )
0.74
0.74
0.69
0.62
0.96
0.53
0.39
0.23
0.65
0.59
0.57
0.54
0.82
0.42
0.28
0.14
0.96
0.53
0.39
0.23
0.77
0.61
n / a
n / a
7-1 / 4
( 184 )
0.74
0.74
0.70
0.62
0.98
0.54
0.40
0.23
0.65
0.60
0.57
0.55
0.87
0.45
0.29
0.15
0.98
0.54
0.40
0.23
0.78
0.62
0.54
n / a
8
( 203 )
0.77
0.77
0.72
0.63
1.00
0.60
0.44
0.26
0.67
0.61
0.58
0.55
1.00
0.52
0.34
0.17
1.00
0.60
0.44
0.26
0.82
0.66
0.57
n / a
9
( 229 )
0.80
0.80
0.75
0.65
0.68
0.50
0.29
0.69
0.62
0.59
0.56
0.62
0.40
0.20
0.68
0.50
0.29
0.87
0.70
0.60
n / a
10
( 254 )
0.84
0.84
0.78
0.67
0.75
0.55
0.32
0.71
0.63
0.60
0.56
0.72
0.47
0.24
0.75
0.55
0.32
0.92
0.73
0.64
n / a
11-1 / 4 ( 286 )
0.88
0.88
0.81
0.69
0.84
0.62
0.36
0.74
0.65
0.61
0.57
0.86
0.56
0.28
0.84
0.62
0.36
0.97
0.78
0.67
0.54
12
( 305 )
0.90
0.90
0.83
0.70
0.90
0.66
0.39
0.75
0.66
0.62
0.58
0.95
0.62
0.31
0.90
0.66
0.39
1.00
0.80
0.70
0.55
14
( 356 )
0.97
0.97
0.89
0.73
1.00
0.77
0.45
0.79
0.69
0.64
0.59
1.00
0.78
0.39
1.00
0.77
0.45
0.87
0.75
0.60
16
( 406 )
1.00
1.00
0.94
0.77
0.88
0.52
0.83
0.72
0.66
0.60
0.95
0.48
0.88
0.52
0.93
0.80
0.64
18
( 457 )
1.00
0.80
0.99
0.58
0.88
0.74
0.68
0.62
1.00
0.58
0.99
0.58
0.98
0.85
0.68
20
( 508 )
0.83
1.00
0.64
0.92
0.77
0.70
0.63
0.67
1.00
0.64
1.00
0.90
0.72
22
( 559 )
0.87
0.71
0.96
0.80
0.72
0.64
0.78
0.71
0.94
0.75
24
( 610 )
0.90
0.77
1.00
0.82
0.74
0.65
0.89
0.77
0.98
0.78
30
( 762 )
1.00
0.97
0.90
0.80
0.69
1.00
0.97
1.00
0.88
36
( 914 )
1.00
0.98
0.86
0.73
1.00
0.96
> 48
( 1219 )
1.00
0.98
0.81
1.00
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
Table 45 — Load adjustment factors for 1 / 2-in . diameter threaded rods in cracked concrete 1 , 2 , 3
1 / 2-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
Embedment
in .
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
2-3 / 4 4-1 / 2
6
10
h ef
( mm )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
( 70 )
( 114 )
( 152 )
( 254 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.48
0.48
0.45
0.41
n / a
n / a
n / a
n / a
0.10
0.05
0.04
0.02
0.21
0.11
0.08
0.05
n / a
n / a
n / a
n / a
2-1 / 2
( 64 )
0.58
0.58
0.57
0.54
0.54
0.54
0.50
0.44
0.55
0.53
0.53
0.52
0.18
0.09
0.07
0.04
0.35
0.19
0.14
0.08
n / a
n / a
n / a
n / a
3
( 76 )
0.60
0.60
0.58
0.55
0.58
0.58
0.53
0.46
0.56
0.54
0.53
0.52
0.23
0.12
0.09
0.06
0.47
0.25
0.18
0.11
n / a
n / a
n / a
n / a
4
( 102 )
0.63
0.63
0.61
0.57
0.66
0.66
0.60
0.49
0.58
0.55
0.55
0.53
0.36
0.19
0.14
0.09
0.66
0.38
0.28
0.17
0.58
n / a
n / a
n / a
5
( 127 )
0.67
0.67
0.64
0.58
0.76
0.76
0.67
0.53
0.61
0.57
0.56
0.54
0.50
0.26
0.20
0.12
0.76
0.53
0.40
0.24
0.65
n / a
n / a
n / a
5-3 / 4
( 146 )
0.69
0.69
0.66
0.60
0.83
0.83
0.73
0.56
0.62
0.58
0.57
0.55
0.62
0.33
0.24
0.15
0.83
0.65
0.49
0.29
0.70
0.56
n / a
n / a
6
( 152 )
0.70
0.70
0.67
0.60
0.85
0.85
0.75
0.57
0.63
0.58
0.57
0.55
0.66
0.35
0.26
0.16
0.85
0.70
0.52
0.31
0.71
0.57
n / a
n / a
7
( 178 )
0.74
0.74
0.69
0.62
0.96
0.96
0.83
0.62
0.65
0.60
0.58
0.56
0.83
0.44
0.33
0.20
0.96
0.88
0.66
0.39
0.77
0.62
n / a
n / a
7-1 / 4
( 184 )
0.74
0.74
0.70
0.62
0.98
0.98
0.85
0.63
0.65
0.60
0.58
0.56
0.88
0.46
0.35
0.21
0.98
0.92
0.69
0.42
0.78
0.63
0.57
n / a
8
( 203 )
0.77
0.77
0.72
0.63
1.00
1.00
0.91
0.66
0.67
0.61
0.59
0.56
1.00
0.54
0.40
0.24
1.00
1.00
0.80
0.48
0.82
0.66
0.60
n / a
9
( 229 )
0.80
0.80
0.75
0.65
1.00
0.70
0.69
0.62
0.60
0.57
0.64
0.48
0.29
0.96
0.58
0.87
0.70
0.64
n / a
10
( 254 )
0.84
0.84
0.78
0.67
0.75
0.71
0.64
0.61
0.58
0.75
0.56
0.34
1.00
0.67
0.92
0.74
0.67
n / a
11-1 / 4 ( 286 )
0.88
0.88
0.81
0.69
0.81
0.74
0.65
0.63
0.59
0.89
0.67
0.40
0.80
0.97
0.79
0.71
0.60
12
( 305 )
0.90
0.90
0.83
0.70
0.85
0.75
0.66
0.64
0.60
0.98
0.74
0.44
0.85
1.00
0.81
0.74
0.62
14
( 356 )
0.97
0.97
0.89
0.73
0.95
0.79
0.69
0.66
0.61
1.00
0.93
0.56
0.95
0.88
0.80
0.67
16
( 406 )
1.00
1.00
0.94
0.77
1.00
0.84
0.72
0.68
0.63
1.00
0.68
1.00
0.94
0.85
0.72
18
( 457 )
1.00
0.80
0.88
0.75
0.70
0.65
0.81
0.99
0.90
0.76
20
( 508 )
0.83
0.92
0.77
0.73
0.66
0.95
1.00
0.95
0.80
22
( 559 )
0.87
0.96
0.80
0.75
0.68
1.00
1.00
0.84
24
( 610 )
0.90
1.00
0.83
0.77
0.69
0.88
30
( 762 )
1.00
0.91
0.84
0.74
0.98
36
( 914 )
0.99
0.91
0.79
1.00
> 48
( 1219 )
1.00
1.00
0.89
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 . ƒ HV
62 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.2 HILTI HIT-HY 200 A / R V3 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