Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 151

Anchor Fastening Technical Guide , Edition 22
Table 63 — Load adjustment factors for 15M rebar in uncracked concrete 1 , 2 , 3
15M 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
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
in .
( mm )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.24
0.14
0.11
n / a
n / a
n / a
0.04
0.02
0.02
0.08
0.04
0.03
n / a
n / a
n / a
3-1 / 8
( 80 )
0.59
0.55
0.54
0.29
0.17
0.13
0.54
0.52
0.52
0.10
0.05
0.04
0.20
0.11
0.08
n / a
n / a
n / a
4
( 102 )
0.61
0.57
0.55
0.33
0.19
0.14
0.55
0.53
0.53
0.14
0.08
0.06
0.29
0.15
0.12
n / a
n / a
n / a
5
( 127 )
0.64
0.58
0.57
0.37
0.21
0.16
0.56
0.54
0.53
0.20
0.11
0.08
0.37
0.21
0.16
n / a
n / a
n / a
6
( 152 )
0.67
0.60
0.58
0.41
0.23
0.18
0.57
0.54
0.54
0.27
0.14
0.11
0.41
0.23
0.18
n / a
n / a
n / a
7
( 178 )
0.70
0.62
0.59
0.46
0.26
0.20
0.58
0.55
0.54
0.33
0.18
0.14
0.46
0.26
0.20
n / a
n / a
n / a
7-1 / 4
( 184 )
0.71
0.62
0.60
0.47
0.26
0.20
0.58
0.55
0.55
0.35
0.18
0.14
0.47
0.26
0.20
0.58
n / a
n / a
8
( 203 )
0.73
0.64
0.61
0.50
0.28
0.22
0.59
0.56
0.55
0.41
0.21
0.17
0.50
0.28
0.22
0.61
n / a
n / a
9
( 229 )
0.76
0.65
0.62
0.56
0.31
0.24
0.60
0.57
0.56
0.49
0.26
0.20
0.56
0.31
0.24
0.64
n / a
n / a
10
( 254 )
0.78
0.67
0.63
0.62
0.35
0.27
0.61
0.57
0.56
0.57
0.30
0.23
0.62
0.35
0.27
0.68
n / a
n / a
11-3 / 8 ( 289 )
0.82
0.69
0.65
0.71
0.40
0.31
0.63
0.58
0.57
0.69
0.36
0.28
0.71
0.40
0.31
0.72
0.58
n / a
12
( 305 )
0.84
0.70
0.66
0.74
0.42
0.32
0.64
0.59
0.58
0.75
0.39
0.31
0.74
0.42
0.32
0.74
0.60
n / a
14-1 / 8 ( 359 )
0.90
0.74
0.69
0.88
0.49
0.38
0.66
0.61
0.59
0.96
0.50
0.39
0.88
0.49
0.38
0.81
0.65
0.60
16
( 406 )
0.96
0.77
0.71
0.99
0.56
0.43
0.68
0.62
0.60
1.00
0.61
0.47
0.99
0.56
0.43
0.86
0.69
0.64
18
( 457 )
1.00
0.80
0.74
1.00
0.63
0.48
0.71
0.63
0.61
0.72
0.56
1.00
0.63
0.48
0.91
0.73
0.67
20
( 508 )
0.84
0.76
0.70
0.54
0.73
0.65
0.63
0.85
0.66
0.70
0.54
0.96
0.77
0.71
22
( 559 )
0.87
0.79
0.77
0.59
0.75
0.66
0.64
0.98
0.76
0.77
0.59
1.00
0.81
0.75
24
( 610 )
0.91
0.82
0.83
0.65
0.78
0.68
0.65
1.00
0.87
0.83
0.65
0.85
0.78
30
( 762 )
1.00
0.90
1.00
0.81
0.84
0.72
0.69
1.00
1.00
0.81
0.95
0.87
36
( 914 )
0.98
0.97
0.91
0.77
0.73
0.97
1.00
0.95
> 48
( 1219 )
1.00
1.00
1.00
0.86
0.80
1.00
1.00
Spacing ( s ) / edge distance ( c a ) / concrete thickness ( h ), - in . ( mm )
3.2.3
Table 64 — Load adjustment factors for 15M rebar in cracked concrete 1 , 2 , 3
15M 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
Spacing ( s ) / edge distance ( c a ) / concrete thickness ( h ), - in . ( mm )
Embedment h ef
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
5-11 / 16 9-13 / 16
12-5 / 8
in .
( mm )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
( 145 )
( 250 )
( 320 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.46
0.41
0.40
n / a
n / a
n / a
0.04
0.02
0.02
0.09
0.04
0.03
n / a
n / a
n / a
3-1 / 8
( 80 )
0.59
0.55
0.54
0.55
0.46
0.44
0.54
0.52
0.52
0.10
0.05
0.04
0.21
0.09
0.07
n / a
n / a
n / a
4
( 102 )
0.61
0.57
0.55
0.61
0.50
0.46
0.55
0.53
0.52
0.15
0.07
0.05
0.29
0.13
0.10
n / a
n / a
n / a
5
( 127 )
0.64
0.58
0.57
0.68
0.54
0.49
0.56
0.53
0.53
0.21
0.09
0.07
0.41
0.19
0.15
n / a
n / a
n / a
6
( 152 )
0.67
0.60
0.58
0.76
0.58
0.52
0.57
0.54
0.53
0.27
0.12
0.10
0.54
0.25
0.19
n / a
n / a
n / a
7
( 178 )
0.70
0.62
0.59
0.84
0.62
0.56
0.58
0.55
0.54
0.34
0.15
0.12
0.68
0.31
0.24
n / a
n / a
n / a
7-1 / 4
( 184 )
0.71
0.62
0.60
0.86
0.63
0.56
0.58
0.55
0.54
0.36
0.16
0.13
0.72
0.33
0.25
0.58
n / a
n / a
8
( 203 )
0.73
0.64
0.61
0.93
0.66
0.59
0.59
0.55
0.55
0.42
0.19
0.15
0.83
0.38
0.30
0.61
n / a
n / a
9
( 229 )
0.76
0.65
0.62
1.00
0.71
0.62
0.60
0.56
0.55
0.50
0.23
0.18
0.99
0.45
0.35
0.65
n / a
n / a
10
( 254 )
0.78
0.67
0.63
0.76
0.66
0.62
0.57
0.56
0.58
0.26
0.21
1.00
0.53
0.41
0.68
n / a
n / a
11-3 / 8
( 289 )
0.82
0.69
0.65
0.82
0.71
0.63
0.58
0.57
0.71
0.32
0.25
0.64
0.50
0.73
0.56
n / a
12
( 305 )
0.84
0.70
0.66
0.86
0.73
0.64
0.58
0.57
0.77
0.35
0.27
0.69
0.54
0.75
0.57
n / a
14-1 / 8
( 359 )
0.90
0.74
0.69
0.97
0.81
0.66
0.60
0.58
0.98
0.44
0.35
0.89
0.69
0.81
0.62
0.57
16
( 406 )
0.96
0.77
0.71
1.00
0.88
0.69
0.61
0.59
1.00
0.53
0.42
1.00
0.84
0.86
0.66
0.61
18
( 457 )
1.00
0.80
0.74
0.96
0.71
0.62
0.60
0.64
0.50
0.96
0.91
0.70
0.65
20
( 508 )
0.84
0.76
1.00
0.73
0.64
0.62
0.75
0.58
1.00
0.96
0.74
0.68
22
( 559 )
0.87
0.79
0.76
0.65
0.63
0.86
0.67
1.00
0.78
0.72
24
( 610 )
0.91
0.82
0.78
0.66
0.64
0.98
0.77
0.81
0.75
30
( 762 )
1.00
0.90
0.85
0.71
0.67
1.00
1.00
0.91
0.84
36
( 914 )
0.98
0.92
0.75
0.71
0.99
0.92
> 48
( 1219 )
1.00
1.00
0.83
0.78
1.00
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 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 .
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
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