Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 208

Table 13 — Load adjustment factors for 3 / 4-in . diameter threaded rods in uncracked concrete 1 , 2 , 3
3 / 4-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 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
h ef
( mm )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.39
0.24
0.18
0.10
n / a
n / a
n / a
n / a
0.09
0.04
0.03
0.02
0.17
0.09
0.06
0.04
n / a
n / a
n / a
n / a
3-3 / 4
( 95 )
0.62
0.59
0.57
0.54
0.57
0.32
0.24
0.14
0.57
0.54
0.54
0.53
0.27
0.13
0.10
0.06
0.53
0.27
0.20
0.12
n / a
n / a
n / a
n / a
4
( 102 )
0.63
0.60
0.57
0.54
0.60
0.33
0.25
0.14
0.57
0.55
0.54
0.53
0.29
0.15
0.11
0.07
0.59
0.30
0.22
0.13
n / a
n / a
n / a
n / a
5
( 127 )
0.66
0.62
0.59
0.56
0.70
0.38
0.28
0.16
0.59
0.56
0.55
0.53
0.41
0.21
0.15
0.09
0.70
0.38
0.28
0.16
n / a
n / a
n / a
n / a
5-1 / 4
( 133 )
0.67
0.63
0.60
0.56
0.73
0.39
0.29
0.17
0.60
0.56
0.55
0.54
0.44
0.22
0.17
0.10
0.73
0.39
0.29
0.17
0.62
n / a
n / a
n / a
6
( 152 )
0.69
0.65
0.61
0.57
0.83
0.43
0.31
0.18
0.61
0.57
0.56
0.54
0.54
0.27
0.20
0.12
0.83
0.41
0.31
0.18
0.67
n / a
n / a
n / a
7
( 178 )
0.73
0.67
0.63
0.58
0.92
0.48
0.35
0.21
0.63
0.58
0.57
0.55
0.68
0.34
0.26
0.15
0.92
0.48
0.35
0.21
0.72
n / a
n / a
n / a
8
( 203 )
0.76
0.70
0.65
0.59
1.00
0.53
0.39
0.23
0.65
0.59
0.58
0.56
0.83
0.42
0.31
0.19
1.00
0.53
0.39
0.23
0.77
n / a
n / a
n / a
8-1 / 2
( 216 )
0.77
0.71
0.66
0.59
0.57
0.42
0.24
0.66
0.60
0.58
0.56
0.91
0.46
0.34
0.21
0.57
0.42
0.24
0.79
0.63
n / a
n / a
9
( 229 )
0.79
0.72
0.67
0.60
0.60
0.44
0.26
0.67
0.61
0.59
0.56
0.99
0.50
0.37
0.22
0.60
0.44
0.26
0.81
0.65
n / a
n / a
10
( 254 )
0.82
0.75
0.69
0.61
0.67
0.49
0.27
0.68
0.62
0.60
0.57
1.00
0.58
0.44
0.26
0.67
0.49
0.29
0.86
0.68
n / a
n / a
10-3 / 4 ( 273 )
0.85
0.77
0.70
0.62
0.72
0.53
0.31
0.70
0.63
0.60
0.57
0.65
0.49
0.29
0.72
0.53
0.31
0.89
0.71
0.64
n / a
12
( 305 )
0.89
0.80
0.72
0.63
0.80
0.59
0.34
0.72
0.64
0.62
0.58
0.77
0.57
0.35
0.80
0.59
0.34
0.94
0.75
0.68
n / a
14
( 356 )
0.95
0.85
0.76
0.66
0.93
0.69
0.40
0.76
0.66
0.63
0.60
0.97
0.72
0.43
0.931
0.68
0.40
1.00
0.81
0.73
n / a
16
( 406 )
1.00
0.90
0.80
0.68
1.00
0.79
0.46
0.80
0.69
0.65
0.61
1.00
0.89
0.53
1.00
0.78
0.46
0.86
0.78
n / a
16-3 / 4 ( 425 )
0.91
0.81
0.69
0.82
0.48
0.81
0.70
0.66
0.61
0.95
0.57
0.82
0.48
0.88
0.80
0.68
18
( 457 )
0.94
0.83
0.70
0.88
0.52
0.83
0.71
0.67
0.62
1.00
0.63
0.88
0.52
0.92
0.83
0.70
20
( 508 )
0.99
0.87
0.72
0.98
0.57
0.87
0.73
0.69
0.64
0.74
0.98
0.57
0.96
0.88
0.74
22
( 559 )
1.00
0.91
0.74
1.00
0.63
0.91
0.76
0.71
0.65
0.86
1.00
0.63
1.00
0.92
0.78
24
( 610 )
0.94
0.77
0.69
0.94
0.78
0.73
0.66
0.98
0.69
0.96
0.81
26
( 660 )
0.98
0.79
0.74
0.98
0.80
0.75
0.68
1.00
0.74
1.00
0.84
28
( 711 )
1.00
0.81
0.80
1.00
0.83
0.77
0.69
0.80
0.87
30
( 762 )
0.83
0.86
0.85
0.79
0.71
0.86
0.91
36
( 914 )
0.90
1.00
0.92
0.85
0.75
1.00
0.99
> 48
( 1219 )
1.00
1.00
0.96
0.83
1.00
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
Table 14 — Load adjustment factors for 3 / 4-in . diameter threaded rods in cracked concrete 1 , 2 , 3
3 / 4-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 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
3-1 / 2 6-3 / 4
9
15
h ef
( mm )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
( 89 )
( 171 )
( 229 )
( 381 )
1-3 / 4
( 44 )
n / a
n / a
n / a
n / a
0.47
0.44
0.42
0.39
n / a
n / a
n / a
n / a
0.14
0.08
0.06
0.04
0.28
0.16
0.12
0.07
n / a
n / a
n / a
n / a
3-3 / 4
( 95 )
0.62
0.59
0.57
0.54
0.63
0.56
0.50
0.44
0.60
0.57
0.55
0.54
0.43
0.25
0.18
0.11
0.63
0.49
0.37
0.22
n / a
n / a
n / a
n / a
4
( 102 )
0.63
0.60
0.57
0.54
0.65
0.57
0.51
0.44
0.60
0.57
0.56
0.54
0.48
0.27
0.20
0.12
0.65
0.56
0.40
0.24
n / a
n / a
n / a
n / a
5
( 127 )
0.66
0.62
0.59
0.56
0.74
0.63
0.56
0.47
0.63
0.59
0.57
0.55
0.67
0.38
0.28
0.17
0.74
0.63
0.56
0.34
n / a
n / a
n / a
n / a
5-1 / 4
( 133 )
0.67
0.63
0.60
0.56
0.76
0.65
0.57
0.48
0.63
0.59
0.58
0.55
0.72
0.41
0.30
0.18
0.76
0.65
0.57
0.37
0.73
n / a
n / a
n / a
6
( 152 )
0.70
0.65
0.61
0.57
0.83
0.70
0.60
0.49
0.65
0.60
0.59
0.56
0.88
0.50
0.37
0.22
0.83
0.70
0.61
0.45
0.78
n / a
n / a
n / a
7
( 178 )
0.73
0.67
0.63
0.58
0.92
0.77
0.65
0.52
0.68
0.62
0.60
0.57
1.00
0.62
0.47
0.28
0.92
0.77
0.65
0.52
0.84
n / a
n / a
n / a
8
( 203 )
0.76
0.70
0.65
0.59
1.00
0.84
0.70
0.55
0.70
0.64
0.62
0.58
0.76
0.57
0.34
1.00
0.84
0.70
0.55
0.90
n / a
n / a
n / a
8-1 / 2
( 216 )
0.78
0.71
0.66
0.59
0.88
0.72
0.56
0.72
0.65
0.62
0.59
0.84
0.63
0.38
0.88
0.72
0.56
0.93
0.77
n / a
n / a
9
( 229 )
0.80
0.72
0.67
0.60
0.91
0.75
0.57
0.73
0.66
0.63
0.59
0.91
0.68
0.41
0.91
0.75
0.57
0.96
0.79
n / a
n / a
10
( 254 )
0.82
0.75
0.69
0.61
0.99
0.80
0.60
0.75
0.67
0.64
0.60
1.00
0.80
0.48
0.99
0.80
0.60
1.00
0.83
n / a
n / a
10-3 / 4 ( 273 )
0.85
0.77
0.70
0.62
1.00
0.84
0.62
0.77
0.69
0.65
0.61
0.90
0.53
1.00
0.84
0.62
0.87
0.79
n / a
12
( 305 )
0.89
0.80
0.72
0.63
0.91
0.66
0.81
0.71
0.67
0.62
1.00
0.63
0.91
0.66
0.91
0.83
n / a
14
( 356 )
0.95
0.85
0.76
0.66
1.00
0.72
0.86
0.74
0.70
0.64
0.79
1.00
0.72
0.99
0.90
n / a
16
( 406 )
1.00
0.90
0.80
0.68
0.78
0.91
0.78
0.73
0.66
0.97
0.78
1.00
0.96
n / a
16-3 / 4 ( 425 )
0.91
0.81
0.69
0.81
0.93
0.79
0.74
0.67
1.00
0.81
0.98
0.83
18
( 457 )
0.94
0.83
0.70
0.85
0.96
0.81
0.76
0.68
0.85
1.00
0.86
20
( 508 )
0.99
0.87
0.72
0.91
1.00
0.85
0.79
0.70
0.91
0.90
22
( 559 )
1.00
0.91
0.74
0.98
0.88
0.82
0.73
0.98
0.95
24
( 610 )
0.94
0.77
1.00
0.92
0.84
0.75
1.00
0.99
26
( 660 )
0.98
0.79
0.95
0.87
0.77
1.00
28
( 711 )
1.00
0.81
0.99
0.90
0.79
30
( 762 )
0.83
1.00
0.93
0.81
36
( 914 )
0.90
1.00
0.87
> 48
( 1219 )
1.00
0.99
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
204 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