Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 65

Anchor Fastening Technical Guide , Edition 22
Table 42 — 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
Concrete thickness factor in shear 5
Embedment
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
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 )
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.35
0.28
0.22
0.13
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
0.29
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 )
0.59
0.59
0.57
0.54
0.37
0.30
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
0.07
n / a
n / a
n / a
n / a
3
( 76 )
0.63
0.63
0.61
0.57
0.48
0.36
0.28
0.16
0.61
0.55
0.54
0.53
0.51
0.16
0.10
0.06
0.48
0.32
0.21
0.12
n / a
n / a
n / a
n / a
3-5 / 8
( 92 )
0.66
0.66
0.63
0.58
0.56
0.41
0.31
0.18
0.63
0.56
0.54
0.53
0.68
0.21
0.14
0.08
0.56
0.41
0.27
0.16
0.72
n / a
n / a
n / a
4
( 102 )
0.68
0.68
0.65
0.59
0.62
0.44
0.33
0.19
0.64
0.57
0.55
0.53
0.79
0.24
0.16
0.09
0.62
0.44
0.32
0.19
0.75
n / a
n / a
n / a
4-5 / 8
( 117 )
0.71
0.71
0.67
0.60
0.71
0.49
0.36
0.21
0.66
0.58
0.56
0.54
0.98
0.30
0.20
0.12
0.71
0.49
0.36
0.21
0.81
0.55
n / a
n / a
5
( 127 )
0.72
0.72
0.69
0.61
0.77
0.52
0.38
0.22
0.68
0.58
0.56
0.54
1.00
0.34
0.22
0.13
0.77
0.52
0.38
0.22
0.84
0.57
n / a
n / a
5-3 / 4
( 146 )
0.76
0.76
0.71
0.63
0.89
0.59
0.43
0.25
0.70
0.59
0.57
0.55
0.42
0.27
0.16
0.89
0.59
0.43
0.25
0.91
0.61
0.53
n / a
6
( 152 )
0.77
0.77
0.72
0.63
0.93
0.62
0.45
0.26
0.71
0.60
0.57
0.55
0.45
0.29
0.17
0.93
0.62
0.45
0.26
0.92
0.63
0.54
n / a
7
( 178 )
0.81
0.81
0.76
0.66
1.00
0.72
0.53
0.30
0.75
0.61
0.59
0.56
0.57
0.37
0.21
1.00
0.72
0.53
0.30
1.00
0.68
0.58
n / a
8
( 203 )
0.86
0.86
0.80
0.68
0.82
0.60
0.35
0.79
0.63
0.60
0.57
0.69
0.45
0.26
0.82
0.60
0.35
0.72
0.63
n / a
8-3 / 4
( 222 )
0.89
0.89
0.82
0.69
0.90
0.66
0.38
0.81
0.64
0.61
0.57
0.79
0.51
0.30
0.90
0.66
0.38
0.76
0.65
0.55
9
( 229 )
0.90
0.90
0.83
0.70
0.93
0.68
0.39
0.82
0.65
0.61
0.58
0.83
0.54
0.31
0.93
0.68
0.39
0.77
0.66
0.55
10
( 254 )
0.95
0.95
0.87
0.72
1.00
0.75
0.43
0.86
0.66
0.62
0.59
0.97
0.63
0.37
1.00
0.75
0.43
0.81
0.70
0.58
11
( 279 )
0.99
0.99
0.91
0.74
0.83
0.48
0.89
0.68
0.63
0.59
1.00
0.72
0.42
0.83
0.48
0.85
0.73
0.61
12
( 305 )
1.00
1.00
0.94
0.77
0.90
0.52
0.93
0.70
0.65
0.60
0.83
0.48
0.90
0.52
0.88
0.77
0.64
14
( 356 )
1.00
1.00
0.81
1.00
0.61
1.00
0.73
0.67
0.62
1.00
0.61
1.00
0.61
0.96
0.83
0.69
16
( 406 )
0.86
0.70
0.76
0.70
0.64
0.74
0.70
1.00
0.88
0.74
18
( 457 )
0.90
0.78
0.79
0.72
0.65
0.89
0.78
0.94
0.78
24
( 610 )
1.00
1.00
0.89
0.79
0.70
1.00
1.00
1.00
0.91
30
( 762 )
0.99
0.87
0.76
1.00
36
( 914 )
1.00
0.94
0.81
> 48
( 1219 )
1.00
0.91
ƒ RV ƒ HV
3.2.2
Table 43 — 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
Concrete thickness factor in shear 5
Embedment
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
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 )
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.52
0.52
0.49
0.43
n / a
n / a
n / a
n / a
0.25
0.09
0.07
0.04
0.49
0.18
0.14
0.08
n / a
n / a
n / a
n / a
1-7 / 8
( 48 )
0.58
0.58
0.57
0.54
0.54
0.54
0.50
0.44
0.57
0.54
0.53
0.52
0.27
0.10
0.08
0.05
0.54
0.20
0.15
0.09
n / a
n / a
n / a
n / a
2
( 51 )
0.59
0.59
0.57
0.54
0.55
0.55
0.51
0.44
0.57
0.54
0.53
0.52
0.30
0.11
0.08
0.05
0.55
0.22
0.17
0.10
n / a
n / a
n / a
n / a
3
( 76 )
0.63
0.63
0.61
0.57
0.66
0.66
0.60
0.49
0.61
0.56
0.55
0.53
0.55
0.20
0.15
0.09
0.66
0.41
0.30
0.18
n / a
n / a
n / a
n / a
3-5 / 8
( 92 )
0.66
0.66
0.63
0.58
0.74
0.74
0.66
0.53
0.64
0.57
0.56
0.54
0.73
0.27
0.20
0.12
0.74
0.54
0.40
0.24
0.74
n / a
n / a
n / a
4
( 102 )
0.68
0.68
0.65
0.59
0.79
0.79
0.70
0.55
0.65
0.58
0.56
0.55
0.85
0.31
0.23
0.14
0.79
0.63
0.47
0.28
0.77
n / a
n / a
n / a
4-5 / 8
( 117 )
0.71
0.71
0.67
0.60
0.87
0.87
0.76
0.58
0.67
0.59
0.57
0.55
1.00
0.39
0.29
0.17
0.87
0.78
0.58
0.35
0.83
0.60
n / a
n / a
5
( 127 )
0.72
0.72
0.69
0.61
0.92
0.92
0.80
0.60
0.69
0.60
0.58
0.56
0.44
0.33
0.20
0.92
0.87
0.66
0.39
0.86
0.62
n / a
n / a
5-3 / 4
( 146 )
0.76
0.76
0.71
0.63
1.00
1.00
0.88
0.64
0.71
0.61
0.59
0.56
0.54
0.40
0.24
1.00
1.00
0.81
0.49
0.93
0.66
0.60
n / a
6
( 152 )
0.77
0.77
0.72
0.63
0.91
0.66
0.72
0.62
0.60
0.57
0.57
0.43
0.26
0.86
0.52
0.95
0.68
0.62
n / a
7
( 178 )
0.81
0.81
0.76
0.66
1.00
0.72
0.76
0.63
0.61
0.58
0.72
0.54
0.33
1.00
0.65
1.00
0.73
0.67
n / a
8
( 203 )
0.86
0.86
0.80
0.68
0.78
0.80
0.65
0.63
0.59
0.88
0.66
0.40
0.78
0.78
0.71
n / a
8-3 / 4
( 222 )
0.89
0.89
0.82
0.69
0.83
0.83
0.67
0.64
0.60
1.00
0.76
0.46
0.83
0.82
0.74
0.63
9
( 229 )
0.90
0.90
0.83
0.70
0.85
0.84
0.67
0.64
0.60
0.79
0.47
0.85
0.83
0.76
0.64
10
( 254 )
0.95
0.95
0.87
0.72
0.91
0.87
0.69
0.66
0.61
0.93
0.56
0.91
0.88
0.80
0.67
11
( 279 )
0.99
0.99
0.91
0.74
0.98
0.91
0.71
0.67
0.62
1.00
0.64
0.98
0.92
0.84
0.70
12
( 305 )
1.00
1.00
0.94
0.77
1.00
0.95
0.73
0.69
0.64
0.73
1.00
0.96
0.87
0.74
14
( 356 )
1.00
0.81
1.00
0.77
0.72
0.66
0.92
1.00
0.94
0.79
16
( 406 )
0.86
0.81
0.75
0.68
1.00
1.00
0.85
18
( 457 )
0.90
0.85
0.79
0.70
0.90
24
( 610 )
1.00
0.96
0.88
0.77
1.00
30
( 762 )
1.00
0.98
0.84
36
( 914 )
1.00
0.91
> 48
( 1219 )
1.00
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 RV ƒ HV
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
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