Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 206

Table 9 — 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 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
0.404 0.275
0.20
0.12
n / a
n / a
n / a
n / a
0.11
0.07
0.05
0.03
0.22
0.14
0.11
0.06
n / a
n / a
n / a
n / a
2-1 / 2
( 64 )
0.62
0.59
0.57
0.54
0.49
0.32
0.24
0.14
0.55
0.54
0.53
0.52
0.19
0.12
0.09
0.06
0.37
0.25
0.18
0.11
n / a
n / a
n / a
n / a
3
( 76 )
0.64
0.61
0.58
0.55
0.54
0.35
0.26
0.15
0.57
0.55
0.54
0.53
0.24
0.16
0.12
0.07
0.49
0.32
0.24
0.15
n / a
n / a
n / a
n / a
4
( 102 )
0.68
0.65
0.61
0.57
0.67
0.42
0.31
0.18
0.59
0.57
0.55
0.54
0.38
0.25
0.19
0.11
0.67
0.42
0.31
0.18
0.59
n / a
n / a
n / a
5
( 127 )
0.73
0.69
0.64
0.58
0.83
0.49
0.36
0.21
0.61
0.58
0.57
0.55
0.53
0.35
0.26
0.16
0.83
0.49
0.36
0.21
0.66
n / a
n / a
n / a
5-3 / 4
( 146 )
0.76
0.71
0.66
0.60
0.96
0.55
0.41
0.24
0.63
0.59
0.58
0.56
0.65
0.43
0.32
0.19
0.96
0.55
0.41
0.24
0.71
0.62
n / a
n / a
6
( 152 )
0.78
0.72
0.67
0.60
1.00
0.58
0.42
0.25
0.63
0.60
0.58
0.56
0.69
0.46
0.34
0.21
1.00
0.58
0.42
0.25
0.72
0.63
n / a
n / a
7
( 178 )
0.82
0.76
0.69
0.62
0.67
0.49
0.29
0.65
0.62
0.60
0.57
0.87
0.57
0.43
0.26
0.67
0.49
0.29
0.78
0.68
n / a
n / a
7-1 / 4
( 184 )
0.83
0.77
0.70
0.62
0.70
0.5
0.30
0.66
0.62
0.60
0.57
0.92
0.60
0.45
0.27
0.69
0.51
0.30
0.79
0.69
0.63
n / a
8
( 203 )
0.87
0.80
0.72
0.63
0.77
0.56
0.33
0.67
0.63
0.61
0.58
1.00
0.70
0.53
0.32
0.77
0.56
0.33
0.83
0.73
0.66
n / a
9
( 229 )
0.91
0.83
0.75
0.65
0.86
0.63
0.37
0.70
0.65
0.62
0.59
0.84
0.63
0.38
0.86
0.63
0.37
0.88
0.77
0.70
n / a
10
( 254 )
0.96
0.87
0.78
0.67
0.96
0.70
0.41
0.72
0.66
0.64
0.60
0.98
0.73
0.44
0.96
0.70
0.41
0.93
0.81
0.74
n / a
11-1 / 4 ( 286 )
1.00
0.92
0.81
0.69
1.00
0.79
0.46
0.74
0.69
0.65
0.61
1.00
0.88
0.53
1.00
0.79
0.46
0.99
0.86
0.78
0.66
12
( 305 )
0.94
0.83
0.70
0.85
0.49
0.76
0.70
0.66
0.62
0.97
0.58
0.85
0.49
1.00
0.89
0.81
0.69
14
( 356 )
1.00
0.89
0.73
0.99
0.58
0.80
0.73
0.69
0.64
1.00
0.73
0.99
0.58
0.96
0.87
0.74
16
( 406 )
0.94
0.77
1.00
0.66
0.85
0.76
0.72
0.65
0.89
1.00
0.66
1.00
0.93
0.79
18
( 457 )
1.00
0.80
0.74
0.89
0.80
0.74
0.67
1.00
0.74
0.99
0.83
20
( 508 )
0.83
0.82
0.93
0.83
0.77
0.69
0.82
1.00
0.88
22
( 559 )
0.87
0.91
0.98
0.86
0.80
0.71
0.91
0.92
24
( 610 )
0.90
0.99
1.00
0.89
0.83
0.73
0.99
0.96
30
( 762 )
1.00
1.00
0.99
0.91
0.79
1.00
1.00
36
( 914 )
1.00
0.99
0.85
> 48
( 1219 )
1.00
0.96
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
Table 10 — 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 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
0.526
0.49
0.45
0.41
n / a
n / a
n / a
n / a
0.15
0.10
0.08
0.05
0.30
0.20
0.15
0.09
n / a
n / a
n / a
n / a
2-1 / 2
( 64 )
0.62
0.59
0.57
0.54
0.61
0.56
0.50
0.44
0.57
0.55
0.54
0.53
0.26
0.17
0.13
0.08
0.52
0.34
0.26
0.15
n / a
n / a
n / a
n / a
3
( 76 )
0.64
0.61
0.58
0.55
0.67
0.60
0.53
0.46
0.58
0.56
0.55
0.54
0.34
0.22
0.17
0.10
0.67
0.45
0.34
0.20
n / a
n / a
n / a
n / a
4
( 102 )
0.68
0.65
0.61
0.57
0.80
0.70
0.60
0.49
0.61
0.58
0.57
0.549
0.52
0.35
0.26
0.16
0.80
0.69
0.52
0.31
0.66
n / a
n / a
n / a
5
( 127 )
0.73
0.69
0.64
0.58
0.93
0.80
0.67
0.53
0.64
0.60
0.59
0.56
0.73
0.48
0.36
0.22
0.93
0.80
0.67
0.43
0.736
n / a
n / a
n / a
5-3 / 4
( 146 )
0.76
0.71
0.66
0.60
1.00
0.89
0.73
0.56
0.66
0.62
0.60
0.57
0.90
0.60
0.45
0.27
1.00
0.89
0.73
0.54
0.79
0.69
n / a
n / a
6
( 152 )
0.78
0.72
0.67
0.60
0.91
0.75
0.57
0.66
0.62
0.60
0.57
0.96
0.63
0.48
0.29
0.91
0.75
0.57
0.81
0.70
n / a
n / a
7
( 178 )
0.82
0.76
0.69
0.62
1.00
0.83
0.62
0.69
0.64
0.62
0.58
1.00
0.80
0.60
0.36
1.00
0.83
0.62
0.87
0.76
n / a
n / a
7-1 / 4
( 184 )
0.83
0.77
0.70
0.62
0.85
0.63
0.70
0.65
0.62
0.59
0.84
0.63
0.38
0.85
0.63
0.89
0.77
0.70
n / a
8
( 203 )
0.87
0.80
0.72
0.63
0.91
0.66
0.72
0.66
0.64
0.60
0.98
0.73
0.44
0.91
0.66
0.93
0.81
0.74
n / a
9
( 229 )
0.91
0.83
0.75
0.65
1.00
0.70
0.74
0.69
0.65
0.61
1.00
0.87
0.52
1.00
0.70
0.99
0.86
0.78
n / a
10
( 254 )
0.96
0.87
0.78
0.67
0.75
0.77
0.71
0.67
0.62
1.00
0.61
0.75
1.00
0.91
0.82
n / a
11-1 / 4 ( 286 )
1.00
0.92
0.81
0.69
0.81
0.81
0.73
0.69
0.64
0.73
0.81
0.96
0.87
0.74
12
( 305 )
0.94
0.83
0.70
0.85
0.83
0.75
0.70
0.64
0.81
0.85
0.99
0.90
0.76
14
( 356 )
1.00
0.89
0.73
0.95
0.88
0.79
0.74
0.67
1.00
0.95
1.00
0.97
0.82
16
( 406 )
0.94
0.77
1.00
0.93
0.83
0.77
0.69
1.00
1.00
0.88
18
( 457 )
1.00
0.80
0.99
0.87
0.81
0.72
0.93
20
( 508 )
0.83
1.00
0.91
0.84
0.74
0.98
22
( 559 )
0.87
0.95
0.87
0.77
1.00
24
( 610 )
0.90
0.99
0.91
0.79
30
( 762 )
1.00
1.00
1.00
0.86
36
( 914 )
0.93
> 48
( 1219 )
1.00
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
202 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