Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 118

Table 8 — Load adjustment factors for # 3 rebar in uncracked concrete 1 , 2 , 3
# 3 Rebar 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
ƒ HV
Embedment
in .
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
h ef
( mm )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
Spacing ( s ) / edge eistance ( c a ) / concrete thickness ( h ), - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.29
0.22
0.13
n / a
n / a
n / a
0.07
0.06
0.03
0.15
0.11
0.07
n / a
n / a
n / a
1-7 / 8
( 48 )
0.59
0.57
0.54
0.30
0.22
0.13
0.53
0.53
0.52
0.08
0.06
0.04
0.17
0.12
0.07
n / a
n / a
n / a
2
( 51 )
0.59
0.57
0.54
0.31
0.23
0.13
0.53
0.53
0.52
0.09
0.07
0.04
0.18
0.14
0.08
n / a
n / a
n / a
3
( 76 )
0.64
0.61
0.57
0.38
0.28
0.16
0.55
0.54
0.53
0.17
0.13
0.08
0.34
0.25
0.15
n / a
n / a
n / a
4
( 102 )
0.69
0.65
0.59
0.45
0.33
0.19
0.57
0.56
0.54
0.26
0.19
0.12
0.45
0.33
0.19
n / a
n / a
n / a
4-5 / 8
( 117 )
0.72
0.67
0.60
0.50
0.37
0.22
0.58
0.56
0.55
0.32
0.24
0.14
0.50
0.37
0.22
0.56
n / a
n / a
5
( 127 )
0.74
0.69
0.61
0.54
0.39
0.23
0.58
0.57
0.55
0.36
0.27
0.16
0.54
0.39
0.23
0.58
n / a
n / a
5-3 / 4
( 146 )
0.77
0.71
0.63
0.61
0.45
0.26
0.60
0.58
0.56
0.45
0.33
0.20
0.61
0.45
0.26
0.62
0.57
n / a
6
( 152 )
0.78
0.72
0.63
0.64
0.47
0.27
0.60
0.58
0.56
0.47
0.36
0.21
0.64
0.47
0.27
0.64
0.58
n / a
7
( 178 )
0.83
0.76
0.66
0.75
0.54
0.32
0.62
0.60
0.57
0.60
0.45
0.27
0.75
0.54
0.32
0.69
0.63
n / a
8
( 203 )
0.88
0.80
0.68
0.85
0.62
0.36
0.64
0.61
0.58
0.73
0.55
0.33
0.85
0.62
0.36
0.74
0.67
n / a
8-3 / 4
( 222 )
0.91
0.82
0.69
0.93
0.68
0.39
0.65
0.62
0.59
0.84
0.63
0.38
0.93
0.68
0.39
0.77
0.70
0.59
9
( 229 )
0.92
0.83
0.70
0.96
0.70
0.41
0.65
0.63
0.59
0.87
0.65
0.39
0.96
0.70
0.41
0.78
0.71
0.60
10
( 254 )
0.97
0.87
0.72
1.00
0.78
0.45
0.67
0.64
0.60
1.00
0.77
0.46
1.00
0.78
0.45
0.82
0.75
0.63
11
( 279 )
1.00
0.91
0.74
0.85
0.50
0.69
0.65
0.61
0.88
0.53
0.85
0.50
0.86
0.78
0.66
12
( 305 )
0.94
0.77
0.93
0.54
0.70
0.67
0.62
1.00
0.60
0.93
0.54
0.90
0.82
0.69
14
( 356 )
1.00
0.81
1.00
0.63
0.74
0.70
0.64
0.76
1.00
0.63
0.97
0.88
0.75
16
( 406 )
0.86
0.72
0.77
0.72
0.66
0.93
0.72
1.00
0.95
0.80
18
( 457 )
0.90
0.81
0.80
0.75
0.68
1.00
0.81
1.00
0.85
24
( 610 )
1.00
1.00
0.91
0.83
0.74
1.00
0.98
30
( 762 )
1.00
0.92
0.80
1.00
36
( 914 )
1.00
0.86
> 48
( 1219 )
0.98
Table 9 — Load adjustment factors for # 3 rebar in cracked concrete 1 , 2 , 3
# 3 Rebar 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
ƒ HV
Embedment
in .
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
3-3 / 8
4-1 / 2
7-1 / 2
h ef
( mm )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
( 86 )
( 114 )
( 191 )
Spacing ( s ) / edge eistance ( c a ) / concrete thickness ( h ), - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.53
0.49
0.43
n / a
n / a
n / a
0.07
0.05
0.03
0.14
0.11
0.06
n / a
n / a
n / a
1-7 / 8
( 48 )
0.59
0.57
0.54
0.55
0.50
0.44
0.53
0.53
0.52
0.08
0.06
0.03
0.16
0.12
0.07
n / a
n / a
n / a
2
( 51 )
0.59
0.57
0.54
0.56
0.51
0.44
0.53
0.53
0.52
0.09
0.06
0.04
0.17
0.13
0.08
n / a
n / a
n / a
3
( 76 )
0.64
0.61
0.57
0.68
0.60
0.49
0.55
0.54
0.53
0.16
0.12
0.07
0.32
0.24
0.14
n / a
n / a
n / a
4
( 102 )
0.69
0.65
0.59
0.81
0.70
0.55
0.57
0.55
0.54
0.25
0.18
0.11
0.49
0.36
0.22
n / a
n / a
n / a
4-5 / 8
( 117 )
0.72
0.67
0.60
0.90
0.76
0.58
0.58
0.56
0.54
0.31
0.23
0.14
0.61
0.45
0.27
0.55
n / a
n / a
5
( 127 )
0.74
0.69
0.61
0.95
0.80
0.60
0.58
0.57
0.55
0.34
0.25
0.15
0.69
0.51
0.30
0.57
n / a
n / a
5-3 / 4
( 146 )
0.77
0.71
0.63
1.00
0.88
0.64
0.59
0.58
0.55
0.42
0.31
0.19
0.85
0.63
0.38
0.61
0.55
n / a
6
( 152 )
0.78
0.72
0.63
0.91
0.66
0.60
0.58
0.56
0.45
0.33
0.20
0.91
0.67
0.40
0.63
0.57
n / a
7
( 178 )
0.83
0.76
0.66
1.00
0.72
0.61
0.59
0.57
0.57
0.42
0.25
1.00
0.84
0.50
0.68
0.61
n / a
8
( 203 )
0.88
0.80
0.68
0.78
0.63
0.61
0.58
0.70
0.51
0.31
1.00
0.62
0.72
0.65
n / a
8-3 / 4
( 222 )
0.91
0.82
0.69
0.83
0.64
0.62
0.58
0.80
0.59
0.35
0.70
0.76
0.68
0.58
9
( 229 )
0.92
0.83
0.70
0.85
0.65
0.62
0.59
0.83
0.61
0.37
0.74
0.77
0.69
0.58
10
( 254 )
0.97
0.87
0.72
0.91
0.66
0.63
0.60
0.97
0.72
0.43
0.86
0.81
0.73
0.62
11
( 279 )
1.00
0.91
0.74
0.98
0.68
0.65
0.60
1.00
0.83
0.50
0.98
0.85
0.77
0.65
12
( 305 )
0.94
0.77
1.00
0.70
0.66
0.61
0.94
0.57
1.00
0.89
0.80
0.68
14
( 356 )
1.00
0.81
0.73
0.69
0.63
1.00
0.71
0.96
0.86
0.73
16
( 406 )
0.86
0.76
0.71
0.65
0.87
1.00
0.92
0.78
18
( 457 )
0.90
0.79
0.74
0.67
1.00
0.98
0.83
24
( 610 )
1.00
0.89
0.82
0.73
1.00
1.00
0.96
30
( 762 )
0.99
0.90
0.79
1.00
1.00
36
( 914 )
1.00
0.98
0.84
1.00
> 48
( 1219 )
1.00
0.96
1.00
1 Linear interpolation not permitted . 2 Shaded area with reduced edge distance is permitted provided the rebar has no installation torque .
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 .
114
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.3 HIT-RE 500 V3 EPOXY 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