Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 205

Anchor Fastening Technical Guide , Edition 22
Table 7 — 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 edge
ƒ RV
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
0.44
0.32
0.23
0.13
n / a
n / a
n / a
n / a
0.30
0.11
0.08
0.05
0.44
0.22
0.16
0.10
n / a
n / a
n / a
n / a
1-7 / 8
( 48 )
0.61
0.59
0.57
0.54
0.46
0.33
0.24
0.14
0.58
0.54
0.53
0.52
0.33
0.12
0.09
0.05
0.46
0.24
0.18
0.10
n / a
n / a
n / a
n / a
2
( 51 )
0.62
0.60
0.57
0.54
0.48
0.34
0.25
0.14
0.59
0.54
0.54
0.53
0.36
0.13
0.10
0.06
0.48
0.27
0.20
0.12
n / a
n / a
n / a
n / a
3
( 76 )
0.69
0.65
0.61
0.57
0.61
0.43
0.31
0.18
0.63
0.57
0.55
0.54
0.66
0.25
0.18
0.11
0.61
0.43
0.31
0.18
n / a
n / a
n / a
n / a
3-5 / 8
( 92 )
0.72
0.68
0.63
0.58
0.71
0.50
0.36
0.21
0.65
0.58
0.56
0.55
0.88
0.33
0.24
0.15
0.71
0.49
0.36
0.21
0.78
n / a
n / a
n / a
4
( 102 )
0.74
0.70
0.65
0.59
0.79
0.53
0.38
0.22
0.67
0.59
0.57
0.55
1.00
0.38
0.28
0.17
0.79
0.53
0.38
0.23
0.82
n / a
n / a
n / a
4-5 / 8
( 117 )
0.78
0.73
0.671
0.60
0.91
0.61
0.44
0.26
0.70
0.60
0.58
0.56
0.47
0.35
0.21
0.91
0.61
0.44
0.26
0.89
0.63
n / a
n / a
5
( 127 )
0.80
0.75
0.69
0.61
0.98
0.66
0.48
0.28
0.71
0.61
0.60
0.56
0.53
0.40
0.24
0.98
0.66
0.48
0.28
0.92
0.66
n / a
n / a
5-3 / 4
( 146 )
0.85
0.78
0.71
0.68
1.00
0.75
0.55
0.32
0.74
0.63
0.60
0.57
0.65
0.49
0.30
1.00
0.75
0.55
0.32
0.99
0.71
0.64
n / a
6
( 152 )
0.86
0.80
0.72
0.63
0.79
0.57
0.332
0.75
0.63
0.61
0.58
0.69
0.52
0.31
0.79
0.57
0.33
1.00
0.72
0.66
n / a
7
( 178 )
0.93
0.85
0.76
0.66
0.92
0.67
0.39
0.80
0.65
0.63
0.59
0.87
0.65
0.40
0.92
0.67
0.39
0.78
0.71
n / a
8
( 203 )
0.99
0.90
0.80
0.68
1.00
0.76
0.44
0.84
0.67
0.64
0.60
1.00
0.80
0.48
1.00
0.76
0.44
0.83
0.76
n / a
8-3 / 4
( 222 )
1.00
0.93
0.82
0.69
0.84
0.48
0.87
0.69
0.66
0.61
0.91
0.55
0.84
0.48
0.87
0.80
0.67
9
( 229 )
0.94
0.83
0.70
0.86
0.50
0.88
0.70
0.66
0.62
0.95
0.57
0.86
0.50
0.88
0.80
0.68
10
( 254 )
0.99
0.87
0.72
0.96
0.55
0.92
0.72
0.68
0.63
1.00
0.67
0.96
0.55
0.93
0.85
0.71
11
( 279 )
1.00
0.91
0.74
1.00
0.61
0.97
0.74
0.70
0.64
0.77
1.00
0.61
0.98
0.89
0.75
12
( 305 )
0.94
0.77
0.66
1.00
0.76
0.72
0.65
0.88
0.66
1.00
0.93
0.78
14
( 356 )
1.00
0.81
0.78
0.80
0.75
0.68
1.00
0.78
1.00
0.85
16
( 406 )
0.86
0.88
0.85
0.79
0.70
0.89
0.91
18
( 457 )
0.90
1.00
0.89
0.82
0.73
0.10
0.96
24
( 610 )
1.00
1.00
0.93
0.81
1.00
1.00
30
( 762 )
1.00
0.88
36
( 914 )
0.96
> 48
( 1219 )
1.00
ƒ HV
3.2.5
Table 8 — 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 edge
ƒ RV
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
0.59
0.54
0.49
0.43
n / a
n / a
n / a
n / a
0.36
0.13
0.10
0.06
0.59
0.27
0.20
0.12
n / a
n / a
n / a
n / a
1-7 / 8
( 48 )
0.61
0.59
0.57
0.54
0.61
0.56
0.50
0.44
0.59
0.55
0.54
0.53
0.40
0.15
0.11
0.07
0.61
0.30
0.22
0.13
n / a
n / a
n / a
n / a
2
( 51 )
0.62
0.60
0.57
0.54
0.63
0.57
0.51
0.44
0.60
0.55
0.54
0.53
0.44
0.16
0.12
0.07
0.63
0.32
0.24
0.15
n / a
n / a
n / a
n / a
3
( 76 )
0.68
0.65
0.61
0.57
0.79
0.70
0.60
0.49
0.64
0.57
0.56
0.54
0.81
0.30
0.22
0.13
0.79
0.59
0.45
0.27
n / a
n / a
n / a
n / a
3-5 / 8
( 92 )
0.72
0.68
0.63
0.58
0.91
0.79
0.66
0.53
0.67
0.59
0.57
0.55
1.00
0.40
0.30
0.18
0.91
0.79
0.59
0.36
0.84
n / a
n / a
n / a
4
( 102 )
0.74
0.70
0.65
0.59
0.98
0.84
0.70
0.55
0.69
0.60
0.58
0.56
0.46
0.34
0.21
0.98
0.84
0.69
0.41
0.88
n / a
n / a
n / a
4-5 / 8
( 117 )
0.78
0.73
0.67
0.60
1.00
0.93
0.76
0.58
0.72
0.61
0.59
0.57
0.57
0.43
0.26
1.00
0.93
0.76
0.51
0.94
0.68
n / a
n / a
5
( 127 )
0.804
0.75
0.69
0.61
0.99
0.80
0.60
0.74
0.62
0.61
0.57
0.64
0.48
0.29
0.99
0.80
0.58
0.98
0.70
n / a
n / a
5-3 / 4
( 146 )
0.85
0.78
0.71
0.63
1.00
0.89
0.65
0.78
0.64
0.62
0.58
0.79
0.59
0.36
1.00
0.89
0.65
1.00
0.75
0.69
n / a
6
( 152 )
0.86
0.80
0.72
0.63
0.91
0.66
0.79
0.65
0.62
0.59
0.84
0.63
0.38
0.91
0.66
0.77
0.70
n / a
7
( 178 )
0.93
0.85
0.76
0.66
1.00
0.72
0.84
0.67
0.64
0.60
1.00
0.79
0.48
1.00
0.72
0.83
0.76
n / a
8
( 203 )
0.99
0.90
0.80
0.68
0.78
0.89
0.70
0.66
0.62
0.97
0.58
0.78
0.89
0.81
n / a
8-3 / 4
( 222 )
1.00
0.93
0.82
0.69
0.83
0.92
0.72
0.68
0.63
1.00
0.67
0.83
0.93
0.85
0.71
9
( 229 )
0.94
0.83
0.70
0.85
0.93
0.72
0.68
0.63
0.70
0.85
0.94
0.86
0.72
10
( 254 )
0.99
0.87
0.72
0.91
0.98
0.75
0.70
0.65
0.81
0.91
0.99
0.90
0.76
11
( 279 )
1.00
0.91
0.74
0.98
1.00
0.77
0.73
0.66
0.92
0.98
1.00
0.95
0.80
12
( 305 )
0.94
0.76
1.00
0.80
0.75
0.67
1.00
1.00
0.99
0.84
14
( 356 )
1.00
0.81
0.85
0.79
0.70
1.000
0.90
16
( 406 )
0.86
0.90
0.83
0.73
0.96
18
( 457 )
0.90
0.95
0.87
0.76
1.00
24
( 610 )
1.00
1.00
0.99
0.85
30
( 762 )
1.00
0.94
36
( 914 )
1.00
> 48
( 1219 )
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
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.5 HIT-ICE 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
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