Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 152

Table 65 — Load adjustment factors for 20M rebar in uncracked concrete 1 , 2 , 3
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ), - in . ( mm )
20M 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
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
in .
( mm )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.21
0.11
0.10
n / a
n / a
n / a
0.03
0.01
0.01
0.06
0.03
0.02
n / a
n / a
n / a
3-7 / 8
( 98 )
0.58
0.55
0.54
0.26
0.14
0.13
0.53
0.52
0.52
0.09
0.04
0.04
0.18
0.09
0.08
n / a
n / a
n / a
4
( 102 )
0.58
0.55
0.54
0.27
0.15
0.13
0.53
0.52
0.52
0.10
0.05
0.04
0.19
0.09
0.09
n / a
n / a
n / a
5
( 127 )
0.61
0.56
0.55
0.30
0.16
0.15
0.54
0.53
0.53
0.13
0.07
0.06
0.27
0.13
0.12
n / a
n / a
n / a
6
( 152 )
0.63
0.57
0.57
0.33
0.18
0.16
0.55
0.53
0.53
0.17
0.09
0.08
0.33
0.17
0.16
n / a
n / a
n / a
7
( 178 )
0.65
0.58
0.58
0.36
0.19
0.18
0.56
0.54
0.54
0.22
0.11
0.10
0.36
0.19
0.18
n / a
n / a
n / a
8
( 203 )
0.67
0.60
0.59
0.39
0.21
0.19
0.57
0.54
0.54
0.27
0.13
0.12
0.39
0.21
0.19
n / a
n / a
n / a
9
( 229 )
0.69
0.61
0.60
0.42
0.23
0.21
0.58
0.55
0.55
0.32
0.16
0.15
0.42
0.23
0.21
n / a
n / a
n / a
10
( 254 )
0.71
0.62
0.61
0.46
0.25
0.23
0.59
0.55
0.55
0.38
0.19
0.17
0.46
0.25
0.23
0.59
n / a
n / a
11
( 279 )
0.73
0.63
0.62
0.50
0.27
0.25
0.60
0.56
0.56
0.43
0.22
0.20
0.50
0.27
0.25
0.62
n / a
n / a
12
( 305 )
0.75
0.64
0.63
0.54
0.30
0.27
0.60
0.57
0.56
0.49
0.25
0.22
0.54
0.30
0.27
0.65
n / a
n / a
14
( 356 )
0.80
0.67
0.65
0.63
0.34
0.31
0.62
0.58
0.57
0.62
0.31
0.28
0.63
0.34
0.31
0.70
n / a
n / a
16
( 406 )
0.84
0.69
0.67
0.72
0.39
0.36
0.64
0.59
0.58
0.76
0.38
0.34
0.72
0.39
0.36
0.74
0.59
n / a
18
( 457 )
0.88
0.71
0.70
0.81
0.44
0.40
0.66
0.60
0.59
0.91
0.45
0.41
0.81
0.44
0.40
0.79
0.63
0.61
20
( 508 )
0.92
0.74
0.72
0.90
0.49
0.45
0.67
0.61
0.60
1.00
0.53
0.48
0.90
0.49
0.45
0.83
0.66
0.64
22
( 559 )
0.97
0.76
0.74
0.99
0.54
0.49
0.69
0.62
0.61
0.61
0.56
0.99
0.54
0.49
0.87
0.69
0.67
24
( 610 )
1.00
0.79
0.76
1.00
0.59
0.54
0.71
0.63
0.62
0.70
0.63
1.00
0.59
0.54
0.91
0.72
0.70
26
( 660 )
0.81
0.78
0.64
0.58
0.73
0.64
0.63
0.79
0.72
0.64
0.58
0.95
0.75
0.73
28
( 711 )
0.83
0.80
0.69
0.62
0.74
0.65
0.64
0.88
0.80
0.69
0.62
0.99
0.78
0.76
30
( 762 )
0.86
0.83
0.74
0.67
0.76
0.66
0.65
0.97
0.89
0.74
0.67
1.00
0.81
0.78
36
( 914 )
0.93
0.89
0.89
0.80
0.81
0.70
0.68
1.00
1.00
0.89
0.80
0.89
0.86
> 48
( 1219 )
1.00
1.00
1.00
1.00
0.92
0.76
0.75
1.00
1.00
1.00
0.99
Table 66 — Load adjustment factors for 20M rebar in cracked concrete 1 , 2 , 3
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ), - in . ( mm )
20M 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
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
7-7 / 8
14
15-3 / 8
in .
( mm )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
( 200 )
( 355 )
( 390 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.43
0.39
0.39
n / a
n / a
n / a
0.03
0.01
0.01
0.06
0.02
0.02
n / a
n / a
n / a
3-7 / 8
( 98 )
0.58
0.55
0.54
0.53
0.45
0.44
0.53
0.52
0.52
0.09
0.04
0.04
0.18
0.08
0.07
n / a
n / a
n / a
4
( 102 )
0.58
0.55
0.54
0.54
0.45
0.44
0.54
0.52
0.52
0.10
0.04
0.04
0.19
0.08
0.07
n / a
n / a
n / a
5
( 127 )
0.61
0.56
0.55
0.59
0.48
0.47
0.54
0.52
0.52
0.14
0.06
0.05
0.27
0.11
0.10
n / a
n / a
n / a
6
( 152 )
0.63
0.57
0.57
0.64
0.51
0.49
0.55
0.53
0.53
0.18
0.08
0.07
0.36
0.15
0.14
n / a
n / a
n / a
7
( 178 )
0.65
0.58
0.58
0.70
0.53
0.52
0.56
0.53
0.53
0.22
0.09
0.09
0.45
0.19
0.17
n / a
n / a
n / a
8
( 203 )
0.67
0.60
0.59
0.76
0.56
0.54
0.57
0.54
0.54
0.27
0.12
0.10
0.55
0.23
0.21
n / a
n / a
n / a
9
( 229 )
0.69
0.61
0.60
0.82
0.59
0.57
0.58
0.54
0.54
0.33
0.14
0.12
0.65
0.28
0.25
n / a
n / a
n / a
10
( 254 )
0.71
0.62
0.61
0.88
0.62
0.60
0.59
0.55
0.55
0.38
0.16
0.15
0.77
0.32
0.29
0.59
n / a
n / a
11
( 279 )
0.73
0.63
0.62
0.95
0.65
0.62
0.60
0.55
0.55
0.44
0.19
0.17
0.88
0.37
0.34
0.62
n / a
n / a
12
( 305 )
0.75
0.64
0.63
1.00
0.69
0.65
0.61
0.56
0.56
0.50
0.21
0.19
1.00
0.43
0.38
0.65
n / a
n / a
14
( 356 )
0.80
0.67
0.65
0.75
0.71
0.62
0.57
0.56
0.64
0.27
0.24
0.54
0.48
0.70
n / a
n / a
16
( 406 )
0.84
0.69
0.67
0.82
0.77
0.64
0.58
0.57
0.77
0.33
0.30
0.66
0.59
0.75
0.56
n / a
18
( 457 )
0.88
0.71
0.70
0.89
0.83
0.66
0.59
0.58
0.93
0.39
0.35
0.78
0.71
0.80
0.60
0.58
20
( 508 )
0.92
0.74
0.72
0.96
0.90
0.68
0.60
0.59
1.00
0.46
0.41
0.92
0.83
0.84
0.63
0.61
22
( 559 )
0.97
0.76
0.74
1.00
0.96
0.69
0.61
0.60
0.53
0.48
1.00
0.95
0.88
0.66
0.64
24
( 610 )
1.00
0.79
0.76
1.00
0.71
0.62
0.61
0.60
0.54
1.00
0.92
0.69
0.67
26
( 660 )
0.81
0.78
0.73
0.63
0.62
0.68
0.61
0.96
0.72
0.69
28
( 711 )
0.83
0.80
0.75
0.64
0.63
0.76
0.68
0.99
0.74
0.72
30
( 762 )
0.86
0.83
0.76
0.65
0.64
0.84
0.76
1.00
0.77
0.74
36
( 914 )
0.93
0.89
0.82
0.68
0.67
1.00
1.00
0.84
0.82
> 48
( 1219 )
1.00
1.00
0.92
0.74
0.72
0.98
0.94
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 .
148
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