Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 45

Anchor Fastening Technical Guide , Edition 22
Table 10 — Load adjustment factors for 3 / 8-in . diameter Hilti HIT-Z and HIT-Z-R rods in uncracked concrete 1 , 2
Edge distance in shear
3 / 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 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
1-7 / 8
( 48 )
0.63
0.59
0.57
n / a
n / a
0.21
0.57
0.53
0.52
n / a
n / a
0.05
n / a
n / a
0.10
n / a
n / a
n / a
2
( 51 )
0.64
0.60
0.57
n / a
0.25
0.21
0.57
0.53
0.52
n / a
0.09
0.06
n / a
0.17
0.11
n / a
n / a
n / a
2-1 / 4
( 57 )
0.66
0.61
0.58
0.38
0.26
0.22
0.58
0.54
0.53
0.33
0.10
0.07
0.38
0.21
0.13
n / a
n / a
n / a
3
( 76 )
0.71
0.65
0.61
0.46
0.30
0.25
0.61
0.55
0.54
0.51
0.16
0.10
0.51
0.32
0.21
n / a
n / a
n / a
4
( 102 )
0.78
0.70
0.65
0.59
0.36
0.29
0.64
0.57
0.55
0.79
0.24
0.16
0.79
0.44
0.29
0.76
n / a
n / a
4-5 / 8
( 117 )
0.82
0.73
0.67
0.69
0.40
0.31
0.66
0.58
0.56
0.98
0.30
0.20
0.98
0.49
0.31
0.81
0.55
n / a
5
( 127 )
0.85
0.75
0.69
0.74
0.43
0.33
0.68
0.58
0.56
1.00
0.34
0.22
1.00
0.52
0.33
0.84
0.57
n / a
5-3 / 4
( 146 )
0.90
0.78
0.71
0.86
0.49
0.36
0.70
0.59
0.57
1.00
0.42
0.27
1.00
0.59
0.36
0.91
0.61
0.53
6
( 152 )
0.92
0.80
0.72
0.89
0.51
0.38
0.71
0.60
0.57
1.00
0.45
0.29
1.00
0.62
0.38
0.92
0.63
0.54
7
( 178 )
0.99
0.85
0.76
1.00
0.60
0.43
0.75
0.61
0.59
0.57
0.37
0.72
0.43
1.00
0.68
0.58
8
( 203 )
1.00
0.90
0.80
0.69
0.49
0.79
0.63
0.60
0.69
0.45
0.83
0.49
1.00
0.72
0.63
9
( 229 )
1.00
0.94
0.83
0.77
0.55
0.82
0.65
0.61
0.83
0.54
0.93
0.55
0.77
0.66
10
( 254 )
1.00
0.99
0.87
0.86
0.61
0.86
0.66
0.62
0.97
0.63
1.00
0.63
0.81
0.70
11
( 279 )
1.00
0.91
0.94
0.67
0.89
0.68
0.63
1.00
0.72
0.72
0.85
0.73
12
( 305 )
0.94
1.00
0.73
0.93
0.70
0.65
0.83
0.83
0.88
0.77
14
( 356 )
1.00
0.85
1.00
0.73
0.67
1.00
1.00
0.96
0.83
16
( 406 )
0.98
0.76
0.70
1.00
0.88
18
( 457 )
1.00
0.79
0.72
0.94
24
( 610 )
0.89
0.79
1.00
30
( 762 )
0.99
0.87
36
( 914 )
1.00
0.94
> 48
( 1219 )
1.00
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
3.2.2
Table 11 — Load adjustment factors for 3 / 8-in . diameter Hilti HIT-Z and HIT-Z-R rods in cracked concrete 1 , 2
3 / 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 6 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 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
2-3 / 8
( 60 )
3-3 / 8
( 86 )
4-1 / 2
( 114 )
1-7 / 8
( 48 )
0.63
0.59
0.57
n / a
0.56
0.50
0.57
0.53
0.52
n / a
0.08
0.05
n / a
0.16
0.10
n / a
n / a
n / a
2
( 51 )
0.64
0.60
0.57
n / a
0.57
0.51
0.57
0.53
0.52
n / a
0.09
0.06
n / a
0.17
0.11
n / a
n / a
n / a
2-1 / 4
( 57 )
0.66
0.61
0.58
0.73
0.60
0.53
0.58
0.54
0.53
0.34
0.10
0.07
0.67
0.21
0.14
n / a
n / a
n / a
3
( 76 )
0.71
0.65
0.61
0.88
0.70
0.60
0.61
0.55
0.54
0.52
0.16
0.10
0.88
0.32
0.21
n / a
n / a
n / a
4
( 102 )
0.78
0.70
0.65
1.00
0.84
0.70
0.64
0.57
0.55
0.80
0.25
0.16
1.00
0.49
0.32
0.76
n / a
n / a
4-5 / 8
( 117 )
0.82
0.73
0.67
0.93
0.76
0.67
0.58
0.56
0.99
0.31
0.20
0.61
0.40
0.81
0.55
n / a
5
( 127 )
0.85
0.75
0.69
0.99
0.80
0.68
0.58
0.56
1.00
0.34
0.22
0.69
0.45
0.85
0.57
n / a
5-3 / 4
( 146 )
0.90
0.78
0.71
1.00
0.88
0.71
0.59
0.57
0.42
0.28
0.85
0.55
0.91
0.61
0.53
6
( 152 )
0.92
0.80
0.72
0.91
0.71
0.60
0.57
0.45
0.29
0.91
0.59
0.93
0.63
0.54
7
( 178 )
0.99
0.85
0.76
1.00
0.75
0.61
0.59
0.57
0.37
1.00
0.74
1.00
0.68
0.59
8
( 203 )
1.00
0.90
0.80
0.79
0.63
0.60
0.70
0.45
0.91
0.72
0.63
9
( 229 )
0.94
0.83
0.82
0.65
0.61
0.83
0.54
1.00
0.77
0.67
10
( 254 )
0.99
0.87
0.86
0.66
0.62
0.97
0.63
0.81
0.70
11
( 279 )
1.00
0.91
0.89
0.68
0.64
1.00
0.73
0.85
0.74
12
( 305 )
0.94
0.93
0.70
0.65
0.83
0.89
0.77
14
( 356 )
1.00
1.00
0.73
0.67
1.00
0.96
0.83
16
( 406 )
0.76
0.70
1.00
0.89
18
( 457 )
0.79
0.72
0.94
24
( 610 )
0.89
0.79
1.00
30
( 762 )
0.99
0.87
36
( 914 )
1.00
0.94
> 48
( 1219 )
1.00
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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