Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 46

Table 12 — Load adjustment factors for 1 / 2-in . diameter Hilti HIT-Z and HIT-Z-R rods in uncracked concrete 1 , 2
1 / 2-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
Edge distance in shear
⃦ To and away from edge
ƒ RV
Concrete thickness factor in shear 4
Embedment h ef
in .
( mm )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-1 / 2
( 64 )
0.65
0.59
0.57
n / a
0.23
0.20
0.55
0.53
0.53
n / a
0.09
0.06
n / a
0.18
0.12
n / a
n / a
n / a
2-7 / 8
( 73 )
0.67
0.61
0.58
0.35
0.24
0.21
0.56
0.54
0.53
0.22
0.11
0.07
0.35
0.22
0.15
n / a
n / a
n / a
3
( 76 )
0.68
0.61
0.58
0.36
0.25
0.21
0.56
0.54
0.53
0.23
0.12
0.08
0.36
0.24
0.15
n / a
n / a
n / a
3-1 / 2
( 89 )
0.71
0.63
0.60
0.40
0.27
0.22
0.57
0.55
0.54
0.29
0.15
0.10
0.40
0.30
0.19
n / a
n / a
n / a
4
( 102 )
0.74
0.65
0.61
0.44
0.29
0.24
0.58
0.55
0.54
0.36
0.18
0.12
0.44
0.33
0.24
0.58
n / a
n / a
4-1 / 2
( 114 )
0.77
0.67
0.63
0.50
0.31
0.25
0.59
0.56
0.55
0.42
0.22
0.14
0.50
0.35
0.25
0.61
n / a
n / a
5
( 127 )
0.80
0.69
0.64
0.55
0.33
0.27
0.60
0.57
0.55
0.50
0.26
0.17
0.55
0.38
0.27
0.65
n / a
n / a
5-1 / 2
( 140 )
0.83
0.70
0.65
0.61
0.35
0.28
0.62
0.57
0.56
0.57
0.30
0.19
0.61
0.40
0.28
0.68
n / a
n / a
6
( 152 )
0.86
0.72
0.67
0.66
0.38
0.30
0.63
0.58
0.56
0.65
0.34
0.22
0.66
0.43
0.30
0.71
0.57
n / a
7
( 178 )
0.92
0.76
0.69
0.77
0.43
0.33
0.65
0.59
0.57
0.82
0.42
0.28
0.82
0.49
0.33
0.77
0.61
n / a
7-1 / 4
( 184 )
0.94
0.77
0.70
0.80
0.44
0.34
0.65
0.60
0.57
0.87
0.45
0.29
0.87
0.50
0.34
0.78
0.62
0.54
8
( 203 )
0.98
0.80
0.72
0.88
0.49
0.36
0.67
0.61
0.58
1.00
0.52
0.34
1.00
0.56
0.36
0.82
0.66
0.57
9
( 229 )
1.00
0.83
0.75
0.99
0.55
0.40
0.69
0.62
0.59
1.00
0.62
0.40
1.00
0.63
0.40
0.87
0.70
0.60
10
( 254 )
1.00
0.87
0.78
1.00
0.61
0.44
0.71
0.63
0.60
1.00
0.72
0.47
1.00
0.72
0.47
0.92
0.73
0.64
11
( 279 )
1.00
0.91
0.81
0.67
0.48
0.73
0.65
0.61
0.84
0.54
0.84
0.54
0.96
0.77
0.67
12
( 305 )
1.00
0.94
0.83
0.73
0.53
0.75
0.66
0.62
0.95
0.62
0.95
0.62
1.00
0.80
0.70
14
( 356 )
1.00
1.00
0.89
0.85
0.62
0.79
0.69
0.64
1.00
0.78
1.00
0.78
0.87
0.75
16
( 406 )
1.00
0.94
0.98
0.70
0.83
0.72
0.66
0.95
0.95
0.93
0.80
18
( 457 )
1.00
1.00
0.79
0.88
0.74
0.68
1.00
1.00
0.98
0.85
24
( 610 )
1.00
1.00
0.82
0.74
1.00
0.98
30
( 762 )
0.90
0.80
1.00
36
( 914 )
0.98
0.86
> 48
( 1219 )
1.00
0.98
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
Table 13 — Load adjustment factors for 1 / 2-in . diameter Hilti HIT-Z and HIT-Z-R rods in Cracked Concrete 1 , 2
1 / 2-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 7 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 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-3 / 4
( 70 )
4-1 / 2
( 114 )
6
( 152 )
2-1 / 2
( 64 )
0.65
0.59
0.57
0.71
0.56
0.50
0.55
0.53
0.53
0.18
0.09
0.06
0.35
0.18
0.12
n / a
n / a
n / a
2-7 / 8
( 73 )
0.67
0.61
0.58
0.77
0.59
0.53
0.56
0.54
0.53
0.22
0.11
0.07
0.44
0.23
0.15
n / a
n / a
n / a
3
( 76 )
0.68
0.61
0.58
0.79
0.60
0.53
0.56
0.54
0.53
0.23
0.12
0.08
0.47
0.24
0.16
n / a
n / a
n / a
3-1 / 2
( 89 )
0.71
0.63
0.60
0.88
0.65
0.57
0.57
0.55
0.54
0.29
0.15
0.10
0.59
0.30
0.20
n / a
n / a
n / a
4
( 102 )
0.74
0.65
0.61
0.98
0.70
0.60
0.58
0.55
0.54
0.36
0.18
0.12
0.72
0.37
0.24
0.58
n / a
n / a
4-1 / 2
( 114 )
0.77
0.67
0.63
1.00
0.75
0.64
0.59
0.56
0.55
0.43
0.22
0.14
0.86
0.44
0.29
0.62
n / a
n / a
5
( 127 )
0.80
0.69
0.64
1.00
0.80
0.67
0.61
0.57
0.55
0.50
0.26
0.17
1.00
0.52
0.34
0.65
n / a
n / a
5-1 / 2
( 140 )
0.83
0.70
0.65
1.00
0.86
0.71
0.62
0.57
0.56
0.58
0.30
0.19
1.00
0.60
0.39
0.68
n / a
n / a
6
( 152 )
0.86
0.72
0.67
1.00
0.91
0.75
0.63
0.58
0.56
0.66
0.34
0.22
1.00
0.68
0.44
0.71
0.57
n / a
7
( 178 )
0.92
0.76
0.69
1.00
1.00
0.83
0.65
0.59
0.57
0.83
0.43
0.28
1.00
0.86
0.56
0.77
0.62
n / a
7-1 / 4
( 184 )
0.94
0.77
0.70
0.85
0.65
0.60
0.57
0.88
0.45
0.29
0.90
0.59
0.78
0.63
0.54
8
( 203 )
0.98
0.80
0.72
0.91
0.67
0.61
0.58
1.00
0.52
0.34
1.00
0.68
0.82
0.66
0.57
9
( 229 )
1.00
0.83
0.75
1.00
0.69
0.62
0.59
0.62
0.41
0.81
0.87
0.70
0.60
10
( 254 )
1.00
0.87
0.78
0.71
0.64
0.60
0.73
0.47
0.95
0.92
0.74
0.64
11
( 279 )
1.00
0.91
0.81
0.73
0.65
0.61
0.84
0.55
1.00
0.96
0.77
0.67
12
( 305 )
0.94
0.83
0.75
0.66
0.62
0.96
0.62
1.00
0.81
0.70
14
( 356 )
1.00
0.89
0.79
0.69
0.64
1.00
0.79
0.87
0.75
16
( 406 )
0.94
0.84
0.72
0.66
0.96
0.93
0.81
18
( 457 )
1.00
0.88
0.74
0.68
1.00
0.99
0.85
24
( 610 )
1.00
0.82
0.74
1.00
0.99
30
( 762 )
0.91
0.80
1.00
36
( 914 )
0.99
0.87
> 48
( 1219 )
1.00
0.99
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm )
42 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
ƒ HV