Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 150

Table 61 — Load adjustment factors for 10M rebar in uncracked concrete 1 , 2 , 3
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ), - in . ( mm )
10M 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 h ef
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-8 / 9
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-7 / 8
in .
( mm )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.24
0.15
0.12
n / a
n / a
n / a
0.06
0.04
0.03
0.11
0.07
0.06
n / a
n / a
n / a
2-3 / 16
( 55 )
0.58
0.55
0.54
0.26
0.16
0.13
0.53
0.52
0.52
0.08
0.05
0.04
0.15
0.10
0.08
n / a
n / a
n / a
3
( 76 )
0.61
0.57
0.56
0.30
0.19
0.15
0.54
0.53
0.53
0.12
0.08
0.06
0.25
0.16
0.13
n / a
n / a
n / a
4
( 102 )
0.65
0.59
0.57
0.35
0.22
0.17
0.56
0.54
0.54
0.19
0.12
0.10
0.35
0.22
0.17
n / a
n / a
n / a
5
( 127 )
0.68
0.62
0.59
0.41
0.25
0.20
0.57
0.55
0.54
0.27
0.17
0.14
0.41
0.25
0.20
n / a
n / a
n / a
5-11 / 16
( 145 )
0.71
0.63
0.61
0.45
0.28
0.22
0.58
0.56
0.55
0.33
0.21
0.17
0.45
0.28
0.22
0.56
n / a
n / a
6
( 152 )
0.72
0.64
0.61
0.47
0.29
0.23
0.58
0.56
0.55
0.35
0.22
0.18
0.47
0.29
0.23
0.58
n / a
n / a
7
( 178 )
0.76
0.66
0.63
0.54
0.34
0.27
0.60
0.57
0.56
0.44
0.28
0.23
0.54
0.34
0.27
0.62
n / a
n / a
8
( 203 )
0.79
0.69
0.65
0.62
0.38
0.30
0.61
0.58
0.57
0.54
0.35
0.28
0.62
0.38
0.30
0.67
n / a
n / a
8-1 / 4
( 210 )
0.80
0.69
0.65
0.64
0.40
0.31
0.61
0.58
0.57
0.57
0.36
0.29
0.64
0.40
0.31
0.68
0.58
n / a
9
( 229 )
0.83
0.71
0.67
0.70
0.43
0.34
0.62
0.59
0.58
0.65
0.41
0.33
0.70
0.43
0.34
0.71
0.61
n / a
10-1 / 16
( 256 )
0.87
0.74
0.69
0.78
0.48
0.38
0.64
0.60
0.59
0.76
0.49
0.39
0.78
0.48
0.38
0.75
0.64
0.60
11
( 279 )
0.90
0.76
0.71
0.85
0.53
0.42
0.65
0.61
0.60
0.87
0.56
0.44
0.85
0.53
0.42
0.78
0.67
0.62
12
( 305 )
0.94
0.78
0.72
0.93
0.58
0.45
0.67
0.62
0.61
0.99
0.63
0.51
0.93
0.58
0.45
0.81
0.70
0.65
14
( 356 )
1.00
0.83
0.76
1.00
0.67
0.53
0.69
0.64
0.62
1.00
0.80
0.64
1.00
0.67
0.53
0.88
0.76
0.70
16
( 406 )
0.88
0.80
0.77
0.61
0.72
0.66
0.64
0.98
0.78
0.77
0.61
0.94
0.81
0.75
18
( 457 )
0.92
0.84
0.87
0.68
0.75
0.68
0.66
1.00
0.93
0.87
0.68
1.00
0.86
0.80
24
( 610 )
1.00
0.95
1.00
0.91
0.83
0.75
0.71
1.00
1.00
0.91
0.99
0.92
30
( 762 )
1.00
1.00
0.91
0.81
0.76
1.00
1.00
1.00
36
( 914 )
1.00
0.87
0.82
> 48
( 1219 )
0.99
0.92
Table 62 — Load adjustment factors for 10M rebar in cracked concrete 1 , 2 , 3
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ), - in . ( mm )
10M 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 h ef
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-8 / 9
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-7 / 8
4-1 / 2
7-1 / 16
8-7 / 8
in .
( mm )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
( 115 )
( 180 )
( 226 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.49
0.44
0.42
n / a
n / a
n / a
0.05
0.03
0.03
0.10
0.07
0.05
n / a
n / a
n / a
2-3 / 16
( 55 )
0.58
0.55
0.54
0.52
0.46
0.43
0.53
0.52
0.52
0.07
0.04
0.04
0.14
0.09
0.07
n / a
n / a
n / a
3
( 76 )
0.61
0.57
0.56
0.60
0.50
0.47
0.54
0.53
0.53
0.11
0.07
0.06
0.23
0.15
0.12
n / a
n / a
n / a
4
( 102 )
0.65
0.59
0.57
0.70
0.56
0.51
0.55
0.54
0.53
0.18
0.11
0.09
0.35
0.23
0.18
n / a
n / a
n / a
5
( 127 )
0.68
0.62
0.59
0.80
0.62
0.56
0.57
0.55
0.54
0.25
0.16
0.13
0.49
0.32
0.25
n / a
n / a
n / a
5-11 / 16
( 145 )
0.71
0.63
0.61
0.88
0.66
0.59
0.57
0.56
0.55
0.30
0.19
0.15
0.60
0.39
0.31
0.55
n / a
n / a
6
( 152 )
0.72
0.64
0.61
0.91
0.68
0.61
0.58
0.56
0.55
0.32
0.21
0.17
0.65
0.41
0.33
0.56
n / a
n / a
7
( 178 )
0.76
0.66
0.63
1.00
0.74
0.65
0.59
0.57
0.56
0.41
0.26
0.21
0.82
0.52
0.42
0.61
n / a
n / a
8
( 203 )
0.79
0.69
0.65
0.81
0.70
0.60
0.58
0.57
0.50
0.32
0.25
1.00
0.64
0.51
0.65
n / a
n / a
8-1 / 4
( 210 )
0.80
0.69
0.65
0.83
0.72
0.61
0.58
0.57
0.53
0.34
0.27
0.67
0.53
0.66
0.57
n / a
9
( 229 )
0.83
0.71
0.67
0.88
0.76
0.62
0.59
0.58
0.60
0.38
0.30
0.76
0.61
0.69
0.59
n / a
10-1 / 16
( 256 )
0.87
0.74
0.69
0.96
0.81
0.63
0.60
0.58
0.71
0.45
0.36
0.90
0.72
0.73
0.63
0.58
11
( 279 )
0.90
0.76
0.71
1.00
0.86
0.64
0.61
0.59
0.81
0.51
0.41
1.00
0.82
0.76
0.65
0.61
12
( 305 )
0.94
0.78
0.72
0.92
0.66
0.62
0.60
0.92
0.59
0.47
0.92
0.79
0.68
0.63
14
( 356 )
1.00
0.83
0.76
1.00
0.68
0.64
0.62
1.00
0.74
0.59
1.00
0.86
0.74
0.68
16
( 406 )
0.88
0.80
0.71
0.66
0.63
0.90
0.72
0.92
0.79
0.73
18
( 457 )
0.92
0.84
0.74
0.68
0.65
1.00
0.86
0.97
0.84
0.78
24
( 610 )
1.00
0.95
0.81
0.73
0.70
1.00
1.00
0.97
0.90
30
( 762 )
1.00
0.89
0.79
0.75
1.00
1.00
36
( 914 )
0.97
0.85
0.80
> 48
( 1219 )
1.00
0.97
0.90
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 CSA A23.3 Annex D . 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 .
146
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