Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 209

Anchor Fastening Technical Guide , Edition 22
Table 15 — Load adjustment factors for 7 / 8-in . diameter threaded rods in uncracked concrete 1 , 2 , 3
7 / 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 .
3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2
h ef
( mm )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.40
0.23
0.17
0.10
n / a
n / a
n / a
n / a
0.09
0.03
0.02
0.01
0.18
0.06
0.05
0.03
n / a
n / a
n / a
n / a
4-3 / 8
( 111 )
0.62
0.59
0.57
0.54
0.63
0.33
0.24
0.14
0.58
0.54
0.54
0.53
0.35
0.13
0.09
0.06
0.63
0.25
0.19
0.11
n / a
n / a
n / a
n / a
5
( 127 )
0.64
0.61
0.58
0.55
0.68
0.35
0.26
0.15
0.60
0.55
0.54
0.53
0.43
0.15
0.12
0.07
0.68
0.31
0.23
0.14
n / a
n / a
n / a
n / a
5-1 / 2
( 140 )
0.65
0.62
0.59
0.55
0.71
0.37
0.27
0.16
0.60
0.55
0.54
0.53
0.50
0.18
0.13
0.08
0.71
0.35
0.27
0.16
0.65
n / a
n / a
n / a
6
( 152 )
0.67
0.63
0.60
0.56
0.75
0.39
0.28
0.17
0.61
0.56
0.55
0.54
0.57
0.20
0.15
0.09
0.75
0.39
0.28
0.17
0.68
n / a
n / a
n / a
7
( 178 )
0.70
0.65
0.61
0.57
0.83
0.43
0.31
0.18
0.63
0.57
0.56
0.54
0.71
0.25
0.19
0.11
0.83
0.43
0.31
0.18
0.73
n / a
n / a
n / a
8
( 203 )
0.72
0.67
0.63
0.58
0.92
0.47
0.35
0.20
0.65
0.58
0.56
0.55
0.87
0.31
0.23
0.14
0.92
0.47
0.35
0.20
0.78
n / a
n / a
n / a
9
( 229 )
0.75
0.69
0.64
0.59
1.00
0.52
0.38
0.22
0.67
0.59
0.57
0.55
1.00
0.37
0.28
0.17
1.00
0.52
0.38
0.22
0.83
n / a
n / a
n / a
9-7 / 8
( 251 )
0.78
0.71
0.66
0.59
0.57
0.42
0.24
0.69
0.59
0.58
0.56
0.43
0.32
0.19
0.57
0.42
0.24
0.87
0.61
n / a
n / a
10
( 254 )
0.78
0.71
0.66
0.60
0.57
0.42
0.25
0.69
0.60
0.58
0.56
0.43
0.33
0.20
0.57
0.42
0.25
0.87
0.62
n / a
n / a
11
( 279 )
0.81
0.73
0.68
0.61
0.63
0.46
0.27
0.71
0.61
0.59
0.56
0.50
0.38
0.23
0.63
0.46
0.27
0.91
0.65
n / a
n / a
12
( 305 )
0.84
0.75
0.69
0.62
0.69
0.51
0.30
0.73
0.62
0.60
0.57
0.57
0.43
0.26
0.69
0.51
0.30
0.96
0.68
n / a
n / a
12-1 / 2 ( 318 )
0.85
0.77
0.70
0.62
0.72
0.53
0.31
0.74
0.62
0.60
0.57
0.61
0.46
0.27
0.72
0.53
0.31
0.98
0.69
0.63
n / a
14
( 356 )
0.89
0.80
0.72
0.63
0.80
0.59
0.35
0.77
0.63
0.61
0.58
0.72
0.54
0.32
0.80
0.59
0.35
1.00
0.73
0.67
n / a
16
( 406 )
0.95
0.84
0.75
0.65
0.92
0.67
0.40
0.80
0.65
0.63
0.59
0.88
0.66
0.40
0.92
0.67
0.40
0.78
0.71
n / a
18
( 457 )
1.00
0.88
0.79
0.67
1.00
0.76
0.44
0.84
0.67
0.64
0.60
1.00
0.79
0.47
1.00
0.76
0.44
0.83
0.75
n / a
19-1 / 2 ( 495 )
0.91
0.81
0.69
0.82
0.48
0.87
0.69
0.65
0.61
0.89
0.53
0.82
0.48
0.86
0.78
0.66
20
( 508 )
0.92
0.82
0.69
0.84
0.49
0.88
0.69
0.66
0.61
0.92
0.55
0.84
0.49
0.87
0.79
0.67
22
( 559 )
0.97
0.85
0.71
0.93
0.54
0.92
0.71
0.67
0.63
1.00
0.64
0.93
0.54
0.92
0.83
0.70
24
( 610 )
1.00
0.88
0.73
1.00
0.59
0.96
0.73
0.69
0.64
0.73
1.00
0.59
0.96
0.87
0.73
26
( 660 )
0.91
0.75
0.64
0.99
0.75
0.71
0.65
0.82
0.64
1.00
0.91
0.76
28
( 711 )
0.94
0.77
0.69
1.00
0.77
0.72
0.66
0.92
0.69
0.94
0.79
30
( 762 )
0.98
0.79
0.74
0.79
0.74
0.67
1.00
0.74
0.97
0.82
36
( 914 )
1.00
0.84
0.89
0.84
0.78
0.70
0.89
1.00
0.90
> 48
( 1219 )
0.96
1.00
0.96
0.88
0.77
1.00
1.00
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
3.2.5
Table 16 — Load adjustment factors for 7 / 8-in . diameter threaded rods in cracked concrete 1 , 2 , 3
7 / 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 .
3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2 3-1 / 2 7-7 / 8 10-1 / 2 17-1 / 2
h ef
( mm )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
( 89 )
( 200 )
( 267 )
( 445 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.46
0.43
0.41
0.38
n / a
n / a
n / a
n / a
0.16
0.07
0.06
0.03
0.32
0.15
0.11
0.07
n / a
n / a
n / a
n / a
4-3 / 8
( 111 )
0.62
0.59
0.57
0.54
0.63
0.56
0.50
0.44
0.62
0.57
0.56
0.54
0.63
0.29
0.22
0.13
0.63
0.56
0.44
0.26
n / a
n / a
n / a
n / a
5
( 127 )
0.64
0.61
0.58
0.55
0.68
0.59
0.52
0.45
0.64
0.58
0.57
0.55
0.77
0.36
0.27
0.16
0.68
0.59
0.52
0.32
n / a
n / a
n / a
n / a
5-1 / 2
( 140 )
0.65
0.62
0.59
0.55
0.71
0.62
0.54
0.46
0.65
0.59
0.58
0.55
0.89
0.41
0.31
0.19
0.71
0.62
0.54
0.37
0.79
n / a
n / a
n / a
6
( 152 )
0.67
0.63
0.60
0.56
0.75
0.64
0.56
0.47
0.67
0.60
0.58
0.56
1.00
0.47
0.35
0.21
0.75
0.64
0.56
0.42
0.82
n / a
n / a
n / a
7
( 178 )
0.70
0.648
0.61
0.57
0.83
0.70
0.60
0.49
0.70
0.62
0.60
0.57
0.59
0.44
0.27
0.83
0.70
0.60
0.49
0.89
n / a
n / a
n / a
8
( 203 )
0.72
0.67
0.63
0.58
0.92
0.76
0.64
0.52
0.72
0.63
0.61
0.58
0.72
0.54
0.33
0.92
0.76
0.64
0.52
0.95
n / a
n / a
n / a
9
( 229 )
0.75
0.69
0.64
0.59
1.00
0.82
0.69
0.54
0.75
0.65
0.63
0.59
0.86
0.65
0.39
1.00
0.82
0.69
0.54
1.00
n / a
n / a
n / a
9-7 / 8
( 251 )
0.78
0.71
0.66
0.59
0.88
0.72
0.56
0.78
0.67
0.64
0.60
0.99
0.74
0.45
0.87
0.72
0.56
0.81
n / a
n / a
10
( 254 )
0.78
0.71
0.66
0.60
0.88
0.73
0.56
0.78
0.67
0.64
0.60
1.00
0.76
0.46
0.88
0.73
0.56
0.82
n / a
n / a
11
( 279 )
0.81
0.73
0.68
0.61
0.95
0.77
0.59
0.81
0.69
0.65
0.61
0.88
0.53
0.95
0.77
0.59
0.86
n / a
n / a
12
( 305 )
0.84
0.75
0.69
0.61
1.00
0.82
0.61
0.84
0.70
0.67
0.62
1.00
0.60
1.00
0.82
0.61
0.90
n / a
n / a
12-1 / 2 ( 318 )
0.85
0.77
0.70
0.62
0.84
0.62
0.85
0.71
0.67
0.62
0.64
0.84
0.62
0.92
0.83
n / a
14
( 356 )
0.90
0.80
0.72
0.63
0.92
0.66
0.89
0.74
0.69
0.64
0.75
0.91
0.66
0.97
0.88
n / a
16
( 406 )
0.95
0.84
0.75
0.65
1.00
0.71
0.95
0.77
0.72
0.66
0.92
1.00
0.71
1.00
0.94
n / a
18
( 457 )
1.00
0.88
0.79
0.67
0.76
1.00
0.80
0.75
0.68
1.00
0.76
1.00
n / a
19-1 / 2 ( 495 )
0.91
0.81
0.69
0.80
0.83
0.77
0.69
0.80
0.88
20
( 508 )
0.92
0.82
0.69
0.82
0.84
0.78
0.70
0.82
0.89
22
( 559 )
0.97
0.85
0.71
0.87
0.87
0.81
0.72
0.87
0.93
24
( 610 )
1.00
0.88
0.73
0.93
0.90
0.83
0.74
0.93
0.97
26
( 660 )
0.91
0.75
0.99
0.94
0.86
0.76
0.99
1.00
28
( 711 )
0.94
0.77
1.00
0.97
0.89
0.78
1.00
30
( 762 )
0.98
0.79
1.00
0.92
0.80
36
( 914 )
1.00
0.85
1.00
0.86
> 48
( 1219 )
0.96
0.97
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
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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