Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 120

Table 12 — Load adjustment factors for # 5 rebar in uncracked concrete 1 , 2 , 3
# 5 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 .
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
h ef
( mm )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
Spacing ( s ) / edge eistance ( c a ) / concrete thickness ( h ), - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.24
0.18
0.11
n / a
n / a
n / a
0.04
0.03
0.02
0.08
0.06
0.03
n / a
n / a
n / a
3-1 / 8
( 79 )
0.59
0.57
0.54
0.29
0.22
0.13
0.54
0.53
0.52
0.10
0.07
0.04
0.20
0.13
0.08
n / a
n / a
n / a
4
( 102 )
0.61
0.59
0.55
0.33
0.25
0.14
0.55
0.53
0.52
0.15
0.10
0.06
0.29
0.19
0.11
n / a
n / a
n / a
5
( 127 )
0.64
0.61
0.57
0.37
0.28
0.16
0.56
0.54
0.53
0.21
0.13
0.08
0.37
0.27
0.16
n / a
n / a
n / a
6
( 152 )
0.67
0.63
0.58
0.41
0.31
0.18
0.57
0.55
0.54
0.27
0.18
0.10
0.41
0.31
0.18
n / a
n / a
n / a
7
( 178 )
0.70
0.66
0.59
0.46
0.34
0.20
0.58
0.56
0.54
0.34
0.22
0.13
0.46
0.34
0.20
n / a
n / a
n / a
7-1 / 8
( 181 )
0.70
0.66
0.60
0.46
0.34
0.20
0.58
0.56
0.54
0.35
0.23
0.13
0.46
0.34
0.20
0.57
n / a
n / a
8
( 203 )
0.73
0.68
0.61
0.51
0.38
0.22
0.59
0.57
0.55
0.41
0.27
0.16
0.51
0.38
0.22
0.61
n / a
n / a
9
( 229 )
0.76
0.70
0.62
0.56
0.41
0.24
0.60
0.58
0.55
0.50
0.32
0.19
0.56
0.41
0.24
0.65
0.56
n / a
10
( 254 )
0.79
0.72
0.63
0.63
0.46
0.27
0.62
0.59
0.56
0.58
0.38
0.22
0.63
0.46
0.27
0.68
0.59
n / a
11
( 279 )
0.82
0.74
0.65
0.69
0.51
0.30
0.63
0.60
0.57
0.67
0.43
0.25
0.69
0.51
0.30
0.71
0.62
n / a
12
( 305 )
0.84
0.77
0.66
0.75
0.55
0.32
0.64
0.60
0.57
0.76
0.50
0.29
0.75
0.55
0.32
0.75
0.65
n / a
14
( 356 )
0.90
0.81
0.69
0.88
0.64
0.38
0.66
0.62
0.59
0.96
0.62
0.36
0.88
0.64
0.38
0.81
0.70
0.58
16
( 406 )
0.96
0.86
0.71
1.00
0.74
0.43
0.69
0.64
0.60
1.00
0.76
0.45
1.00
0.74
0.43
0.86
0.75
0.62
18
( 457 )
1.00
0.90
0.74
0.83
0.49
0.71
0.66
0.61
0.91
0.53
0.83
0.49
0.91
0.79
0.66
20
( 508 )
0.94
0.77
0.92
0.54
0.73
0.67
0.62
1.00
0.62
0.92
0.54
0.96
0.83
0.70
22
( 559 )
0.99
0.79
1.00
0.59
0.75
0.69
0.63
0.72
1.00
0.59
1.00
0.87
0.73
24
( 610 )
1.00
0.82
0.65
0.78
0.71
0.65
0.82
0.65
0.91
0.76
26
( 660 )
0.85
0.70
0.80
0.73
0.66
0.92
0.70
0.95
0.79
28
( 711 )
0.87
0.75
0.82
0.74
0.67
1.00
0.75
0.99
0.82
30
( 762 )
0.90
0.81
0.85
0.76
0.68
0.81
1.00
0.85
36
( 914 )
0.98
0.97
0.92
0.81
0.72
0.97
0.94
> 48
( 1219 )
1.00
1.00
1.00
0.92
0.79
1.00
1.00
Table 13 — Load adjustment factors for # 5 rebar in cracked concrete 1 , 2 , 3
# 5 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 .
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
5-5 / 8
7-1 / 2
12-1 / 2
h ef
( mm )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
( 143 )
( 191 )
( 318 )
Spacing ( s ) / edge eistance ( c a ) / concrete thickness ( h ), - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.46
0.43
0.40
n / a
n / a
n / a
0.04
0.03
0.01
0.09
0.06
0.03
n / a
n / a
n / a
3-1 / 8
( 79 )
0.59
0.57
0.54
0.55
0.50
0.44
0.54
0.53
0.52
0.10
0.07
0.03
0.20
0.13
0.07
n / a
n / a
n / a
4
( 102 )
0.61
0.59
0.55
0.61
0.55
0.46
0.55
0.53
0.52
0.15
0.10
0.05
0.30
0.19
0.10
n / a
n / a
n / a
5
( 127 )
0.64
0.61
0.57
0.69
0.60
0.49
0.56
0.54
0.53
0.21
0.13
0.07
0.41
0.27
0.14
n / a
n / a
n / a
6
( 152 )
0.67
0.63
0.58
0.77
0.66
0.53
0.57
0.55
0.53
0.27
0.18
0.09
0.54
0.35
0.18
n / a
n / a
n / a
7
( 178 )
0.70
0.66
0.59
0.85
0.72
0.56
0.58
0.56
0.54
0.34
0.22
0.11
0.68
0.44
0.23
n / a
n / a
n / a
7-1 / 8
( 181 )
0.70
0.66
0.60
0.86
0.73
0.56
0.58
0.56
0.54
0.35
0.23
0.12
0.70
0.46
0.23
0.58
n / a
n / a
8
( 203 )
0.73
0.68
0.61
0.93
0.78
0.59
0.59
0.57
0.54
0.42
0.27
0.14
0.84
0.54
0.28
0.61
n / a
n / a
9
( 229 )
0.76
0.70
0.62
1.00
0.85
0.62
0.60
0.58
0.55
0.50
0.32
0.17
1.00
0.65
0.33
0.65
0.56
n / a
10
( 254 )
0.79
0.72
0.63
0.91
0.66
0.62
0.59
0.56
0.58
0.38
0.19
0.76
0.39
0.68
0.59
n / a
11
( 279 )
0.82
0.74
0.65
0.98
0.69
0.63
0.60
0.56
0.67
0.44
0.22
0.88
0.45
0.72
0.62
n / a
12
( 305 )
0.84
0.77
0.66
1.00
0.73
0.64
0.60
0.57
0.77
0.50
0.26
1.00
0.51
0.75
0.65
n / a
14
( 356 )
0.90
0.81
0.69
0.81
0.66
0.62
0.58
0.97
0.63
0.32
0.64
0.81
0.70
0.56
16
( 406 )
0.96
0.86
0.71
0.89
0.69
0.64
0.59
1.00
0.77
0.39
0.79
0.86
0.75
0.60
18
( 457 )
1.00
0.90
0.74
0.97
0.71
0.66
0.60
0.92
0.47
0.94
0.92
0.79
0.63
20
( 508 )
0.94
0.77
1.00
0.73
0.67
0.61
1.00
0.55
1.00
0.97
0.84
0.67
22
( 559 )
0.99
0.79
0.76
0.69
0.62
0.63
1.00
0.88
0.70
24
( 610 )
1.00
0.82
0.78
0.71
0.63
0.72
0.92
0.73
26
( 660 )
0.85
0.80
0.73
0.65
0.81
0.95
0.76
28
( 711 )
0.87
0.83
0.74
0.66
0.91
0.99
0.79
30
( 762 )
0.90
0.85
0.76
0.67
1.00
1.00
0.82
36
( 914 )
0.98
0.92
0.81
0.70
0.90
> 48
( 1219 )
1.00
1.00
0.92
0.77
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 .
116
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