Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 231

Anchor Fastening Technical Guide , Edition 22
Table 49 — 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 edge
ƒ RV
Concrete thickness factor in shear 5
ƒ HV
Embedment in . 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 h ef
( 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
0.22
0.12
0.10
n / a
n / a
n / a
0.03
0.02
0.02
0.07
0.04
0.03
n / a
n / a
n / a
5
( 127 )
0.59
0.55
0.54
0.33
0.18
0.14
0.55
0.53
0.53
0.17
0.09
0.08
0.33
0.18
0.14
n / a
n / a
n / a
6
( 152 )
0.61
0.56
0.55
0.36
0.20
0.16
0.56
0.54
0.54
0.22
0.12
0.10
0.36
0.20
0.16
n / a
n / a
n / a
7
( 178 )
0.63
0.57
0.56
0.40
0.22
0.17
0.57
0.55
0.54
0.27
0.16
0.13
0.40
0.22
0.17
n / a
n / a
n / a
8
( 203 )
0.65
0.58
0.57
0.44
0.24
0.19
0.58
0.56
0.55
0.34
0.19
0.15
0.44
0.24
0.19
n / a
n / a
n / a
9
( 229 )
0.67
0.59
0.58
0.48
0.26
0.21
0.59
0.56
0.55
0.40
0.23
0.18
0.48
0.26
0.21
n / a
n / a
n / a
10
( 254 )
0.68
0.60
0.58
0.52
0.29
0.23
0.60
0.57
0.56
0.47
0.27
0.21
0.52
0.29
0.23
n / a
n / a
n / a
11-9 / 16 ( 294 )
0.71
0.62
0.60
0.61
0.33
0.26
0.62
0.58
0.57
0.58
0.33
0.27
0.61
0.33
0.26
0.68
n / a
n / a
12
( 305 )
0.72
0.63
0.60
0.63
0.34
0.27
0.62
0.58
0.57
0.62
0.35
0.28
0.63
0.34
0.27
0.69
n / a
n / a
14
( 356 )
0.76
0.65
0.62
0.73
0.40
0.32
0.64
0.60
0.58
0.78
0.44
0.35
0.73
0.40
0.32
0.75
n / a
n / a
16
( 406 )
0.79
0.67
0.63
0.84
0.46
0.37
0.66
0.61
0.60
0.95
0.54
0.43
0.84
0.46
0.37
0.80
n / a
n / a
18
( 457 )
0.83
0.69
0.65
0.94
0.52
0.41
0.68
0.62
0.61
1.00
0.64
0.52
0.94
0.52
0.41
0.85
n / a
n / a
18-7 / 16 ( 469 )
0.84
0.69
0.66
0.97
0.53
0.42
0.69
0.63
0.61
0.67
0.54
0.97
0.53
0.42
0.86
0.71
n / a
20
( 508 )
0.87
0.71
0.67
1.00
0.57
0.46
0.70
0.64
0.62
0.75
0.60
1.00
0.57
0.46
0.90
0.74
n / a
22-3 / 8 ( 568 )
0.91
0.73
0.69
0.64
0.51
0.72
0.65
0.63
0.89
0.72
0.64
0.51
0.95
0.79
0.73
24
( 610 )
0.94
0.75
0.70
0.69
0.55
0.74
0.67
0.64
0.99
0.80
0.69
0.55
0.98
0.81
0.76
26
( 660 )
0.98
0.77
0.72
0.75
0.59
0.76
0.68
0.65
1.00
0.90
0.75
0.59
1.00
0.85
0.79
28
( 711 )
1.00
0.79
0.74
0.80
0.64
0.78
0.69
0.67
1.00
0.80
0.64
0.88
0.82
30
( 762 )
0.81
0.75
0.86
0.68
0.80
0.71
0.68
0.86
0.68
0.91
0.85
36
( 914 )
0.88
0.80
1.00
0.82
0.86
0.75
0.71
1.00
0.82
1.00
0.93
> 48
( 1219 )
1.00
0.90
1.00
0.98
0.83
0.79
1.00
1.00
1 Linear interpolation not permitted
2 Shaded area with reduced edge distance is permitted provided the installation torque is reduced to 0.30 T max for 5d ≤ s ≤ 16-in . and to 0.5 T max for s > 16-in .
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 .
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm )
3.2.5
Table 50 — Load adjustment factors for 30M rebar in uncracked concrete 1 , 2 , 3
30M 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 edge
ƒ RV
Concrete thickness factor in shear 5
ƒ HV
Embedment in . 17-15 / 16 23-9 / 16 10-1 / 4 17-15 / 16 23-9 / 16 10-1 / 4 17-15 / 16 23-9 / 16 10-1 / 4 17-15 / 16 23-9 / 16 10-1 / 4 17-15 / 16 23-9 / 16 10-1 / 4 17-15 / 16 23-9 / 16 23-9 / 16 h ef
( mm ) ( 455 ) ( 598 ) ( 260 ) ( 455 ) ( 598 ) ( 260 ) ( 455 ) ( 598 ) ( 260 ) ( 455 ) ( 598 ) ( 260 ) ( 455 ) ( 598 ) ( 260 ) ( 455 ) ( 598 ) ( 598 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.23
0.13
0.09
n / a
n / a
n / a
0.02
0.01
0.01
0.04
0.03
0.02
n / a
n / a
n / a
5-7 / 8
( 150 )
0.60
0.55
0.54
0.35
0.19
0.14
0.54
0.53
0.53
0.14
0.08
0.06
0.28
0.16
0.12
n / a
n / a
n / a
6
( 152 )
0.60
0.56
0.54
0.35
0.19
0.14
0.55
0.53
0.53
0.14
0.08
0.06
0.28
0.16
0.12
n / a
n / a
n / a
7
( 178 )
0.61
0.57
0.55
0.38
0.21
0.16
0.55
0.54
0.53
0.18
0.10
0.08
0.36
0.20
0.15
n / a
n / a
n / a
8
( 203 )
0.63
0.57
0.56
0.41
0.23
0.17
0.56
0.54
0.53
0.22
0.12
0.09
0.41
0.23
0.17
n / a
n / a
n / a
9
( 229 )
0.65
0.58
0.56
0.45
0.25
0.18
0.57
0.55
0.54
0.26
0.15
0.11
0.45
0.25
0.18
n / a
n / a
n / a
10
( 254 )
0.66
0.59
0.57
0.48
0.27
0.20
0.58
0.55
0.54
0.30
0.17
0.13
0.48
0.27
0.20
n / a
n / a
n / a
11
( 279 )
0.68
0.60
0.58
0.52
0.29
0.21
0.58
0.56
0.55
0.35
0.20
0.15
0.52
0.29
0.21
n / a
n / a
n / a
12
( 305 )
0.70
0.61
0.58
0.56
0.31
0.23
0.59
0.56
0.55
0.40
0.23
0.17
0.56
0.31
0.23
n / a
n / a
n / a
13-1 / 4 ( 337 )
0.72
0.62
0.59
0.62
0.34
0.26
0.60
0.57
0.56
0.46
0.26
0.20
0.62
0.34
0.26
0.63
n / a
n / a
14
( 356 )
0.73
0.63
0.60
0.66
0.36
0.27
0.61
0.57
0.56
0.50
0.29
0.22
0.66
0.36
0.27
0.65
n / a
n / a
16
( 406 )
0.76
0.65
0.61
0.75
0.41
0.31
0.62
0.58
0.57
0.61
0.35
0.27
0.75
0.41
0.31
0.69
n / a
n / a
18
( 457 )
0.79
0.67
0.63
0.85
0.46
0.35
0.64
0.59
0.58
0.73
0.42
0.32
0.85
0.46
0.35
0.74
n / a
n / a
20
( 508 )
0.83
0.69
0.64
0.94
0.52
0.39
0.65
0.60
0.59
0.86
0.49
0.37
0.94
0.52
0.39
0.78
n / a
n / a
20-7 / 8 ( 531 )
0.84
0.69
0.65
0.98
0.54
0.41
0.66
0.61
0.59
0.92
0.52
0.40
0.98
0.54
0.41
0.79
n / a
n / a
22
( 559 )
0.86
0.70
0.66
1.00
0.57
0.43
0.67
0.61
0.60
0.99
0.57
0.43
1.00
0.57
0.43
0.81
0.68
n / a
24
( 610 )
0.89
0.72
0.67
0.62
0.47
0.68
0.62
0.60
1.00
0.64
0.49
0.62
0.47
0.85
0.71
n / a
26-9 / 16 ( 675 )
0.93
0.75
0.69
0.69
0.52
0.70
0.64
0.61
0.75
0.57
0.69
0.52
0.89
0.74
0.68
28
( 711 )
0.96
0.76
0.70
0.72
0.54
0.71
0.65
0.62
0.81
0.62
0.72
0.54
0.92
0.76
0.70
30
( 762 )
0.99
0.78
0.71
0.77
0.58
0.73
0.66
0.63
0.90
0.69
0.77
0.58
0.95
0.79
0.72
36
( 914 )
1.00
0.83
0.75
0.93
0.70
0.77
0.69
0.66
1.00
0.90
0.93
0.70
1.00
0.86
0.79
> 48
( 1219 )
0.95
0.84
1.00
0.93
0.86
0.75
0.71
1.00
1.00
0.93
1.00
0.91
1 Linear interpolation not permitted
2 Shaded area with reduced edge distance is permitted provided the installation torque is reduced to 0.30 T max for 5d ≤ s ≤ 16-in . and to 0.5 T max for s > 16-in .
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 .
Spacing ( s ) / Edge distance ( c a
) / Concrete thickness ( h ), - in . ( mm )
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.5 HIT-ICE 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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