Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 153

Anchor Fastening Technical Guide , Edition 22
Table 67 — Load adjustment factors for 25M rebar in uncracked concrete 1 , 2 , 3
25M 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
Spacing ( s ) / edge distance ( c a ) / concrete thickness ( h ), - in . ( mm )
Embedment h ef
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
in .
( mm )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.24
0.12
0.10
n / a
n / a
n / a
0.02
0.01
0.01
0.04
0.02
0.02
n / a
n / a
n / a
5
( 127 )
0.59
0.55
0.54
0.32
0.16
0.13
0.54
0.52
0.52
0.11
0.05
0.04
0.22
0.09
0.07
n / a
n / a
n / a
6
( 152 )
0.61
0.56
0.55
0.34
0.18
0.14
0.55
0.53
0.52
0.14
0.06
0.05
0.28
0.12
0.10
n / a
n / a
n / a
7
( 178 )
0.63
0.57
0.56
0.37
0.19
0.15
0.55
0.53
0.53
0.18
0.08
0.06
0.36
0.15
0.12
n / a
n / a
n / a
8
( 203 )
0.65
0.58
0.57
0.40
0.21
0.16
0.56
0.53
0.53
0.22
0.09
0.07
0.40
0.19
0.15
n / a
n / a
n / a
9
( 229 )
0.67
0.59
0.58
0.43
0.22
0.18
0.57
0.54
0.53
0.26
0.11
0.09
0.43
0.22
0.18
n / a
n / a
n / a
10
( 254 )
0.68
0.60
0.58
0.46
0.24
0.19
0.58
0.54
0.54
0.30
0.13
0.10
0.46
0.24
0.19
n / a
n / a
n / a
11-9 / 16
( 294 )
0.71
0.62
0.60
0.51
0.26
0.21
0.59
0.55
0.54
0.38
0.16
0.13
0.51
0.26
0.21
0.59
n / a
n / a
12
( 305 )
0.72
0.63
0.60
0.52
0.27
0.21
0.59
0.55
0.54
0.40
0.17
0.14
0.52
0.27
0.21
0.60
n / a
n / a
14
( 356 )
0.76
0.65
0.62
0.59
0.31
0.24
0.61
0.56
0.55
0.50
0.22
0.17
0.59
0.31
0.24
0.65
n / a
n / a
16
( 406 )
0.79
0.67
0.63
0.68
0.35
0.28
0.62
0.57
0.56
0.62
0.26
0.21
0.68
0.35
0.28
0.69
n / a
n / a
18
( 457 )
0.83
0.69
0.65
0.76
0.39
0.31
0.64
0.58
0.57
0.74
0.31
0.25
0.76
0.39
0.31
0.74
n / a
n / a
18-7 / 16
( 469 )
0.84
0.69
0.66
0.78
0.40
0.32
0.64
0.58
0.57
0.76
0.33
0.26
0.78
0.40
0.32
0.75
0.56
n / a
20
( 508 )
0.87
0.71
0.67
0.85
0.44
0.35
0.65
0.59
0.57
0.86
0.37
0.30
0.85
0.44
0.35
0.78
0.59
n / a
22-3 / 8
( 568 )
0.91
0.73
0.69
0.95
0.49
0.39
0.67
0.60
0.58
1.00
0.44
0.35
0.95
0.49
0.39
0.82
0.62
0.58
24
( 610 )
0.94
0.75
0.70
1.00
0.52
0.42
0.68
0.60
0.59
0.48
0.39
1.00
0.52
0.42
0.85
0.64
0.60
26
( 660 )
0.98
0.77
0.72
0.57
0.45
0.70
0.61
0.60
0.55
0.44
0.57
0.45
0.89
0.67
0.62
28
( 711 )
1.00
0.79
0.74
0.61
0.49
0.71
0.62
0.60
0.61
0.49
0.61
0.49
0.92
0.69
0.64
30
( 762 )
0.81
0.75
0.66
0.52
0.73
0.63
0.61
0.68
0.54
0.66
0.52
0.95
0.72
0.67
36
( 914 )
0.88
0.80
0.79
0.63
0.77
0.65
0.63
0.89
0.71
0.79
0.63
1.00
0.79
0.73
> 48
( 1219 )
1.00
0.90
1.00
0.84
0.86
0.71
0.68
1.00
1.00
1.00
0.84
0.91
0.84
3.2.3
Table 68 — Load adjustment factors for 25M rebar in cracked concrete 1 , 2 , 3
25M 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
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
9-1 / 16
15-15 / 16 19-13 / 16
in .
( mm )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
( 230 )
( 405 )
( 504 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.42
0.39
0.38
n / a
n / a
n / a
0.02
0.01
0.01
0.05
0.02
0.01
n / a
n / a
n / a
5
( 127 )
0.59
0.55
0.54
0.55
0.46
0.44
0.54
0.52
0.52
0.11
0.05
0.03
0.22
0.09
0.07
n / a
n / a
n / a
6
( 152 )
0.61
0.56
0.55
0.60
0.48
0.46
0.55
0.53
0.52
0.14
0.06
0.04
0.29
0.12
0.09
n / a
n / a
n / a
7
( 178 )
0.63
0.57
0.56
0.65
0.51
0.48
0.55
0.53
0.52
0.18
0.08
0.06
0.36
0.16
0.11
n / a
n / a
n / a
8
( 203 )
0.65
0.58
0.57
0.70
0.53
0.50
0.56
0.53
0.53
0.22
0.10
0.07
0.44
0.19
0.14
n / a
n / a
n / a
9
( 229 )
0.67
0.59
0.58
0.75
0.56
0.51
0.57
0.54
0.53
0.27
0.11
0.08
0.53
0.23
0.16
n / a
n / a
n / a
10
( 254 )
0.68
0.60
0.58
0.80
0.59
0.53
0.58
0.54
0.53
0.31
0.13
0.10
0.62
0.27
0.19
n / a
n / a
n / a
11-9 / 16
( 294 )
0.71
0.62
0.60
0.89
0.63
0.57
0.59
0.55
0.54
0.39
0.17
0.12
0.77
0.33
0.24
0.60
n / a
n / a
12
( 305 )
0.72
0.63
0.60
0.91
0.64
0.58
0.59
0.55
0.54
0.41
0.17
0.13
0.82
0.35
0.25
0.61
n / a
n / a
14
( 356 )
0.76
0.65
0.62
1.00
0.69
0.62
0.61
0.56
0.55
0.51
0.22
0.16
1.00
0.44
0.32
0.65
n / a
n / a
16
( 406 )
0.79
0.67
0.63
0.75
0.66
0.62
0.57
0.56
0.63
0.27
0.19
0.54
0.39
0.70
n / a
n / a
18
( 457 )
0.83
0.69
0.65
0.81
0.71
0.64
0.58
0.56
0.75
0.32
0.23
0.64
0.46
0.74
n / a
n / a
18-7 / 16
( 469 )
0.84
0.69
0.66
0.83
0.72
0.64
0.58
0.56
0.78
0.33
0.24
0.67
0.48
0.75
0.57
n / a
20
( 508 )
0.87
0.71
0.67
0.87
0.75
0.65
0.59
0.57
0.88
0.38
0.27
0.75
0.54
0.78
0.59
n / a
22-3 / 8
( 568 )
0.91
0.73
0.69
0.95
0.81
0.67
0.60
0.58
1.00
0.44
0.32
0.89
0.64
0.83
0.62
0.56
24
( 610 )
0.94
0.75
0.70
1.00
0.85
0.68
0.60
0.58
0.49
0.36
0.99
0.71
0.86
0.65
0.58
26
( 660 )
0.98
0.77
0.72
0.90
0.70
0.61
0.59
0.56
0.40
1.00
0.80
0.89
0.67
0.60
28
( 711 )
1.00
0.79
0.74
0.95
0.71
0.62
0.60
0.62
0.45
0.90
0.93
0.70
0.63
30
( 762 )
0.81
0.75
1.00
0.73
0.63
0.60
0.69
0.50
1.00
0.96
0.72
0.65
36
( 914 )
0.88
0.80
0.78
0.66
0.63
0.91
0.65
1.00
0.79
0.71
> 48
( 1219 )
1.00
0.90
0.87
0.71
0.67
1.00
1.00
0.91
0.82
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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