Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 47

Anchor Fastening Technical Guide , Edition 22
Table 14 — Load adjustment factors for 5 / 8-in . diameter Hilti HIT-Z and HIT-Z-R rods in uncracked concrete 1 , 2
Edge distance in shear
5 / 8-in . HIT-Z ( -R ) uncracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 3
ƒ AV
┴ Toward edge
ƒ RV
⃦ To and away from edge
ƒ RV
Concrete thickness factor in shear 4
Embedment h ef
in .
( mm )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-1 / 8
( 79 )
0.64
0.59
0.57
n / a
n / a
0.20
0.55
0.54
0.53
n / a
n / a
0.07
n / a
n / a
0.13
n / a
n / a
n / a
3-1 / 4
( 83 )
0.64
0.60
0.57
n / a
0.24
0.20
0.55
0.54
0.53
n / a
0.11
0.07
n / a
0.21
0.14
n / a
n / a
n / a
3-3 / 4
( 95 )
0.67
0.61
0.58
0.34
0.25
0.21
0.56
0.54
0.53
0.23
0.13
0.09
0.34
0.27
0.17
n / a
n / a
n / a
4
( 102 )
0.68
0.62
0.59
0.36
0.26
0.22
0.57
0.55
0.53
0.25
0.15
0.10
0.36
0.29
0.19
n / a
n / a
n / a
5
( 127 )
0.72
0.65
0.61
0.42
0.29
0.24
0.58
0.56
0.54
0.36
0.21
0.13
0.42
0.38
0.24
n / a
n / a
n / a
5-1 / 2
( 140 )
0.74
0.66
0.62
0.45
0.31
0.25
0.59
0.56
0.55
0.41
0.24
0.15
0.45
0.40
0.25
0.61
n / a
n / a
6
( 152 )
0.77
0.68
0.63
0.49
0.33
0.26
0.60
0.57
0.55
0.47
0.27
0.18
0.49
0.42
0.26
0.63
n / a
n / a
7
( 178 )
0.81
0.71
0.66
0.57
0.36
0.29
0.62
0.58
0.56
0.59
0.34
0.22
0.59
0.47
0.29
0.68
n / a
n / a
7-3 / 8
( 187 )
0.83
0.72
0.66
0.60
0.38
0.30
0.62
0.59
0.56
0.64
0.37
0.24
0.64
0.49
0.30
0.70
0.58
n / a
8
( 203 )
0.86
0.74
0.68
0.65
0.40
0.31
0.63
0.59
0.57
0.72
0.41
0.27
0.72
0.52
0.31
0.73
0.61
n / a
9
( 229 )
0.90
0.77
0.70
0.73
0.45
0.34
0.65
0.60
0.58
0.86
0.50
0.32
0.86
0.58
0.34
0.78
0.65
n / a
9-1 / 4
( 235 )
0.91
0.77
0.71
0.76
0.46
0.35
0.65
0.61
0.58
0.89
0.52
0.34
0.89
0.59
0.35
0.79
0.65
0.57
10
( 254 )
0.94
0.80
0.72
0.82
0.50
0.37
0.67
0.62
0.59
1.00
0.58
0.38
1.00
0.64
0.38
0.82
0.68
0.59
11
( 279 )
0.99
0.83
0.74
0.90
0.55
0.39
0.68
0.63
0.60
1.00
0.67
0.43
1.00
0.70
0.43
0.86
0.71
0.62
12
( 305 )
1.00
0.86
0.77
0.98
0.60
0.43
0.70
0.64
0.60
1.00
0.76
0.50
1.00
0.77
0.50
0.90
0.75
0.65
14
( 356 )
1.00
0.91
0.81
1.00
0.70
0.50
0.73
0.66
0.62
0.96
0.62
0.96
0.62
0.97
0.81
0.70
16
( 406 )
1.00
0.97
0.86
0.80
0.57
0.77
0.69
0.64
1.00
0.76
1.00
0.76
1.00
0.86
0.75
18
( 457 )
1.00
1.00
0.90
0.89
0.64
0.80
0.71
0.66
0.91
0.91
0.91
0.79
24
( 610 )
1.00
1.00
1.00
0.86
0.90
0.78
0.71
1.00
1.00
1.00
0.91
30
( 762 )
1.00
1.00
0.85
0.76
1.00
36
( 914 )
0.92
0.81
> 48
( 1219 )
1.00
0.92
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
3.2.2
Table 15 — Load adjustment factors for 5 / 8-in . diameter Hilti HIT-Z and HIT-Z-R rods in cracked concrete 1 , 2
5 / 8-in . HIT-Z ( -R ) cracked concrete
1 Linear interpolation not permitted .
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 3
2 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 or CSA A23.3 Annex D .
3 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 .
4 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 .
If a reduction factor value is in a shaded area , this indicates that this specific edge distance may not be permitted with a certain spacing ( or vice versa ). Check with figure 6 and table 8 of this section to calculate permissible edge distance , spacing and concrete thickness combinations .
ƒ AV
┴ Toward edge
ƒ RV
Edge distance in shear
⃦ To and away from edge
ƒ RV
Concrete thickness factor in shear 4
Embedment h ef
in .
( mm )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-3 / 4
( 95 )
5-5 / 8
( 143 )
7-1 / 2
( 191 )
3-1 / 8
( 79 )
0.64
0.59
0.57
0.67
0.56
0.50
0.55
0.54
0.53
0.18
0.10
0.07
0.35
0.20
0.13
n / a
n / a
n / a
3-1 / 4
( 83 )
0.64
0.60
0.57
0.69
0.56
0.51
0.55
0.54
0.53
0.19
0.11
0.07
0.38
0.22
0.14
n / a
n / a
n / a
3-3 / 4
( 95 )
0.67
0.61
0.58
0.75
0.60
0.53
0.56
0.54
0.53
0.23
0.13
0.09
0.47
0.27
0.17
n / a
n / a
n / a
4
( 102 )
0.68
0.62
0.59
0.78
0.62
0.55
0.57
0.55
0.53
0.26
0.15
0.10
0.51
0.30
0.19
n / a
n / a
n / a
5
( 127 )
0.72
0.65
0.61
0.91
0.70
0.60
0.58
0.56
0.54
0.36
0.21
0.13
0.72
0.41
0.27
n / a
n / a
n / a
5-1 / 2
( 140 )
0.74
0.66
0.62
0.98
0.74
0.63
0.59
0.56
0.55
0.41
0.24
0.15
0.83
0.48
0.31
0.61
n / a
n / a
6
( 152 )
0.77
0.68
0.63
1.00
0.78
0.66
0.60
0.57
0.55
0.47
0.27
0.18
0.94
0.54
0.35
0.64
n / a
n / a
7
( 178 )
0.81
0.71
0.66
1.00
0.87
0.72
0.62
0.58
0.56
0.59
0.34
0.22
1.00
0.68
0.44
0.69
n / a
n / a
7-3 / 8
( 187 )
0.83
0.72
0.66
1.00
0.90
0.74
0.62
0.59
0.56
0.64
0.37
0.24
1.00
0.74
0.48
0.70
0.59
n / a
8
( 203 )
0.86
0.74
0.68
1.00
0.96
0.78
0.63
0.59
0.57
0.73
0.42
0.27
1.00
0.84
0.54
0.73
0.61
n / a
9
( 229 )
0.90
0.77
0.70
1.00
1.00
0.85
0.65
0.60
0.58
0.87
0.50
0.32
1.00
1.00
0.65
0.78
0.65
n / a
9-1 / 4
( 235 )
0.91
0.77
0.71
0.86
0.66
0.61
0.58
0.90
0.52
0.34
0.68
0.79
0.66
0.57
10
( 254 )
0.94
0.80
0.72
0.91
0.67
0.62
0.59
1.00
0.58
0.38
0.76
0.82
0.68
0.59
11
( 279 )
0.99
0.83
0.74
0.98
0.69
0.63
0.60
0.67
0.44
0.88
0.86
0.72
0.62
12
( 305 )
1.00
0.86
0.77
1.00
0.70
0.64
0.60
0.77
0.50
1.00
0.90
0.75
0.65
14
( 356 )
1.00
0.91
0.81
0.74
0.66
0.62
0.97
0.63
1.00
0.97
0.81
0.70
16
( 406 )
0.97
0.86
0.77
0.69
0.64
1.00
0.77
1.00
0.86
0.75
18
( 457 )
1.00
0.90
0.80
0.71
0.66
0.92
0.92
0.79
24
( 610 )
1.00
0.90
0.78
0.71
1.00
1.00
0.92
30
( 762 )
1.00
0.85
0.76
1.00
36
( 914 )
0.92
0.81
> 48
( 1219 )
1.00
0.92
Spacing ( s ) / Edge Distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.2 HILTI HIT-HY 200 A / R V3 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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