Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 70

Table 52 — Load adjustment factors for 1-in . diameter threaded rods in uncracked concrete 1 , 2 , 3
1-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 .
4
9
12
20
4
9
12
20
4
9
12
20
4
9
12
20
4
9
12
20
4
9
12
20
h ef
( mm )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.38
0.24
0.18
0.10
n / a
n / a
n / a
n / a
0.08
0.02
0.01
0.01
0.15
0.05
0.03
0.01
n / a
n / a
n / a
n / a
2-3 / 4
( 70 )
n / a
n / a
n / a
n / a
0.45
0.26
0.19
0.11
n / a
n / a
n / a
n / a
0.15
0.04
0.03
0.01
0.30
0.09
0.06
0.03
n / a
n / a
n / a
n / a
5
( 127 )
0.58
0.58
0.57
0.54
0.54
0.32
0.23
0.13
0.59
0.54
0.53
0.52
0.37
0.11
0.07
0.03
0.54
0.22
0.14
0.07
n / a
n / a
n / a
n / a
6
( 152 )
0.60
0.60
0.58
0.55
0.58
0.34
0.25
0.14
0.60
0.55
0.53
0.52
0.48
0.14
0.09
0.04
0.58
0.29
0.19
0.09
n / a
n / a
n / a
n / a
6-1 / 4
( 159 )
0.61
0.61
0.59
0.55
0.59
0.35
0.25
0.14
0.61
0.55
0.54
0.52
0.51
0.15
0.10
0.05
0.59
0.30
0.20
0.09
0.65
n / a
n / a
n / a
7
( 178 )
0.62
0.62
0.60
0.56
0.62
0.37
0.27
0.15
0.62
0.55
0.54
0.52
0.61
0.18
0.12
0.05
0.62
0.36
0.23
0.11
0.69
n / a
n / a
n / a
8
( 203 )
0.63
0.63
0.61
0.57
0.66
0.40
0.29
0.16
0.64
0.56
0.55
0.53
0.74
0.22
0.14
0.07
0.66
0.40
0.29
0.13
0.74
n / a
n / a
n / a
9
( 229 )
0.65
0.65
0.63
0.58
0.71
0.43
0.31
0.17
0.65
0.57
0.55
0.53
0.89
0.26
0.17
0.08
0.71
0.43
0.31
0.16
0.78
n / a
n / a
n / a
10
( 254 )
0.67
0.67
0.64
0.58
0.76
0.46
0.33
0.18
0.67
0.58
0.56
0.53
1.00
0.31
0.20
0.09
0.76
0.46
0.33
0.18
0.83
n / a
n / a
n / a
11
( 279 )
0.69
0.69
0.65
0.59
0.80
0.49
0.35
0.19
0.69
0.58
0.56
0.54
0.35
0.23
0.11
0.80
0.49
0.35
0.19
0.87
n / a
n / a
n / a
11-1 / 4 ( 286 )
0.69
0.69
0.66
0.59
0.82
0.50
0.35
0.19
0.69
0.59
0.56
0.54
0.37
0.24
0.11
0.82
0.50
0.35
0.19
0.88
0.58
n / a
n / a
12
( 305 )
0.70
0.70
0.67
0.60
0.85
0.52
0.37
0.20
0.70
0.59
0.57
0.54
0.40
0.26
0.12
0.85
0.52
0.37
0.20
0.91
0.60
n / a
n / a
13
( 330 )
0.72
0.72
0.68
0.61
0.90
0.55
0.39
0.22
0.72
0.60
0.57
0.54
0.46
0.30
0.14
0.90
0.55
0.39
0.22
0.94
0.63
n / a
n / a
14
( 356 )
0.74
0.74
0.69
0.62
0.96
0.59
0.41
0.23
0.74
0.61
0.58
0.55
0.51
0.33
0.15
0.96
0.59
0.41
0.23
0.98
0.65
n / a
n / a
14-1 / 4 ( 362 )
0.74
0.74
0.70
0.62
0.97
0.60
0.42
0.23
0.74
0.61
0.58
0.55
0.52
0.34
0.16
0.97
0.60
0.42
0.23
0.99
0.66
0.57
n / a
16
( 406 )
0.77
0.77
0.72
0.63
1.00
0.67
0.47
0.26
0.77
0.62
0.59
0.55
0.62
0.40
0.19
1.00
0.67
0.47
0.26
1.00
0.70
0.60
n / a
18
( 457 )
0.80
0.80
0.75
0.65
0.76
0.53
0.29
0.81
0.64
0.60
0.56
0.74
0.48
0.22
0.76
0.53
0.29
0.74
0.64
n / a
20
( 508 )
0.84
0.84
0.78
0.67
0.84
0.58
0.32
0.84
0.65
0.61
0.57
0.87
0.56
0.26
0.84
0.58
0.32
0.78
0.67
n / a
22
( 559 )
0.87
0.87
0.81
0.68
0.93
0.64
0.35
0.88
0.67
0.63
0.58
1.00
0.65
0.30
0.93
0.64
0.35
0.82
0.71
n / a
22-1 / 4 ( 565 )
0.87
0.87
0.81
0.69
0.94
0.65
0.36
0.88
0.67
0.63
0.58
0.66
0.31
0.94
0.65
0.36
0.82
0.71
0.55
24
( 610 )
0.90
0.90
0.83
0.70
1.00
0.70
0.39
0.91
0.68
0.64
0.58
0.74
0.35
1.00
0.70
0.39
0.85
0.74
0.57
26
( 660 )
0.94
0.94
0.86
0.72
0.76
0.42
0.94
0.70
0.65
0.59
0.84
0.39
0.76
0.42
0.89
0.77
0.60
28
( 711 )
0.97
0.97
0.89
0.73
0.82
0.45
0.98
0.71
0.66
0.60
0.94
0.43
0.82
0.45
0.92
0.80
0.62
30
( 762 )
1.00
1.00
0.92
0.75
0.88
0.48
1.00
0.73
0.67
0.60
1.00
0.48
0.88
0.48
0.95
0.83
0.64
36
( 914 )
1.00
0.80
1.00
0.58
0.77
0.70
0.62
0.63
1.00
0.58
1.00
0.91
0.70
> 48
( 1219 )
0.90
0.77
0.86
0.77
0.66
0.98
0.77
1.00
0.81
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
Table 53 — Load adjustment factors for 1-in . diameter threaded rods in cracked concrete 1 , 2 , 3
1-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 .
4
9
12
20
4
9
12
20
4
9
12
20
4
9
12
20
4
9
12
20
4
9
12
20
h ef
( mm )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
( 102 )
( 229 )
( 305 )
( 508 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.41
0.41
0.40
0.38
n / a
n / a
n / a
n / a
0.08
0.02
0.01
0.01
0.15
0.05
0.03
0.01
n / a
n / a
n / a
n / a
2-3 / 4
( 70 )
n / a
n / a
n / a
n / a
0.45
0.45
0.43
0.40
n / a
n / a
n / a
n / a
0.15
0.04
0.03
0.01
0.30
0.09
0.06
0.03
n / a
n / a
n / a
n / a
5
( 127 )
0.58
0.58
0.57
0.54
0.54
0.54
0.50
0.44
0.59
0.54
0.53
0.52
0.37
0.11
0.07
0.03
0.54
0.22
0.14
0.07
n / a
n / a
n / a
n / a
6
( 152 )
0.60
0.60
0.58
0.55
0.58
0.58
0.53
0.46
0.60
0.55
0.53
0.52
0.49
0.14
0.09
0.04
0.58
0.29
0.19
0.09
n / a
n / a
n / a
n / a
6-1 / 4
( 159 )
0.61
0.61
0.59
0.55
0.59
0.59
0.54
0.46
0.61
0.55
0.54
0.52
0.52
0.15
0.10
0.05
0.59
0.31
0.20
0.09
0.66
n / a
n / a
n / a
7
( 178 )
0.62
0.62
0.60
0.56
0.62
0.62
0.57
0.47
0.62
0.55
0.54
0.52
0.61
0.18
0.12
0.05
0.62
0.36
0.24
0.11
0.69
n / a
n / a
n / a
8
( 203 )
0.63
0.63
0.61
0.57
0.66
0.66
0.60
0.49
0.64
0.56
0.55
0.53
0.75
0.22
0.14
0.07
0.66
0.44
0.29
0.13
0.74
n / a
n / a
n / a
9
( 229 )
0.65
0.65
0.63
0.58
0.71
0.71
0.64
0.51
0.65
0.57
0.55
0.53
0.89
0.26
0.17
0.08
0.71
0.53
0.34
0.16
0.79
n / a
n / a
n / a
10
( 254 )
0.67
0.67
0.64
0.58
0.76
0.76
0.67
0.53
0.67
0.58
0.56
0.53
1.00
0.31
0.20
0.09
0.76
0.62
0.40
0.19
0.83
n / a
n / a
n / a
11
( 279 )
0.69
0.69
0.65
0.59
0.80
0.80
0.71
0.55
0.69
0.58
0.56
0.54
0.36
0.23
0.11
0.80
0.72
0.46
0.22
0.87
n / a
n / a
n / a
11-1 / 4 ( 286 )
0.69
0.69
0.66
0.59
0.82
0.82
0.72
0.56
0.69
0.59
0.56
0.54
0.37
0.24
0.11
0.82
0.74
0.48
0.22
0.88
0.59
n / a
n / a
12
( 305 )
0.70
0.70
0.67
0.60
0.85
0.85
0.75
0.57
0.71
0.59
0.57
0.54
0.41
0.26
0.12
0.85
0.82
0.53
0.25
0.91
0.61
n / a
n / a
13
( 330 )
0.72
0.72
0.68
0.61
0.90
0.90
0.79
0.59
0.72
0.60
0.57
0.54
0.46
0.30
0.14
0.90
0.90
0.60
0.28
0.95
0.63
n / a
n / a
14
( 356 )
0.74
0.74
0.69
0.62
0.96
0.96
0.83
0.62
0.74
0.61
0.58
0.55
0.51
0.33
0.16
0.96
0.96
0.67
0.31
0.98
0.65
n / a
n / a
14-1 / 4 ( 362 )
0.74
0.74
0.70
0.62
0.97
0.97
0.84
0.62
0.74
0.61
0.58
0.55
0.53
0.34
0.16
0.97
0.97
0.69
0.32
0.99
0.66
0.57
n / a
16
( 406 )
0.77
0.77
0.72
0.63
1.00
1.00
0.91
0.66
0.77
0.62
0.59
0.55
0.63
0.41
0.19
1.00
1.00
0.82
0.38
1.00
0.70
0.61
n / a
18
( 457 )
0.80
0.80
0.75
0.65
1.00
0.70
0.81
0.64
0.60
0.56
0.75
0.49
0.23
0.97
0.45
0.74
0.64
n / a
20
( 508 )
0.84
0.84
0.78
0.67
0.75
0.84
0.65
0.61
0.57
0.88
0.57
0.26
1.00
0.53
0.78
0.68
n / a
22
( 559 )
0.87
0.87
0.81
0.68
0.80
0.88
0.67
0.63
0.58
1.00
0.66
0.31
0.61
0.82
0.71
n / a
22-1 / 4 ( 565 )
0.87
0.87
0.81
0.69
0.80
0.88
0.67
0.63
0.58
0.67
0.31
0.62
0.82
0.71
0.55
24
( 610 )
0.90
0.90
0.83
0.70
0.85
0.91
0.68
0.64
0.58
0.75
0.35
0.70
0.86
0.74
0.57
26
( 660 )
0.94
0.94
0.86
0.72
0.90
0.95
0.70
0.65
0.59
0.84
0.39
0.78
0.89
0.77
0.60
28
( 711 )
0.97
0.97
0.89
0.73
0.95
0.98
0.71
0.66
0.60
0.94
0.44
0.88
0.92
0.80
0.62
30
( 762 )
1.00
1.00
0.92
0.75
1.00
1.00
0.73
0.67
0.60
1.00
0.49
0.97
0.96
0.83
0.64
36
( 914 )
1.00
0.80
0.77
0.71
0.62
0.64
1.00
1.00
0.91
0.70
> 48
( 1219 )
0.90
0.87
0.77
0.66
0.98
1.00
0.81
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 .
66 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
ƒ HV