Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 341

Anchor Fastening Technical Guide , Edition 22
Table 10 — Load adjustment factors for 1 / 2-in . diameter Hilti KH-EZ and KH-EZ CRC in uncracked concrete 1 , 2
1 / 2-in . KH-EZ 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
II to and away from edge
ƒ RV
Conc . thickness factor in shear 4
ƒ HV
Embedment h nom
in .
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
( mm )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.68
0.57
0.51
n / a
n / a
n / a
0.40
0.25
0.07
0.68
0.50
0.15
n / a
n / a
n / a
2
( 51 )
n / a
n / a
n / a
0.75
0.62
0.54
n / a
n / a
n / a
0.48
0.31
0.09
0.75
0.61
0.18
n / a
n / a
n / a
2-1 / 2
( 64 )
n / a
n / a
n / a
0.91
0.71
0.60
n / a
n / a
n / a
0.68
0.43
0.13
0.91
0.71
0.25
n / a
n / a
n / a
3
( 76 )
0.83
0.73
0.66
1.00
0.81
0.66
0.65
0.61
0.55
0.89
0.56
0.17
1.00
0.81
0.33
n / a
n / a
n / a
3-1 / 2
( 89 )
0.88
0.77
0.68
0.93
0.73
0.68
0.63
0.56
1.00
0.71
0.21
0.93
0.42
n / a
n / a
n / a
4
( 102 )
0.94
0.81
0.71
1.00
0.80
0.71
0.65
0.57
0.87
0.26
1.00
0.52
n / a
n / a
n / a
4-1 / 2
( 114 )
0.99
0.85
0.73
0.87
0.73
0.67
0.58
1.00
0.31
0.62
0.96
n / a
n / a
4-3 / 4
( 121 )
1.00
0.87
0.75
0.91
0.74
0.68
0.58
0.33
0.67
0.99
0.85
n / a
5
( 127 )
0.89
0.76
0.95
0.76
0.69
0.58
0.36
0.72
1.00
0.87
n / a
6
( 152 )
0.96
0.81
1.00
0.81
0.73
0.60
0.47
0.95
0.95
n / a
6-3 / 4
( 171 )
1.00
0.85
0.85
0.76
0.61
0.57
1.00
1.00
0.68
7
( 178 )
0.86
0.86
0.77
0.62
0.60
0.69
8
( 203 )
0.91
0.91
0.80
0.64
0.73
0.73
9
( 229 )
0.97
0.96
0.84
0.65
0.87
0.78
10
( 254 )
1.00
1.00
0.88
0.67
1.00
0.82
11
( 279 )
0.92
0.69
0.86
12
( 305 )
0.95
0.70
0.90
14
( 356 )
1.00
0.74
0.97
16
( 406 )
0.77
1.00
18
( 457 )
0.80
20
( 508 )
0.84
> 24
( 610 )
0.91
Spacing ( s )/ edge distance ( c a )/ concrete thickness ( h ) - in . ( mm )
Table 11 — Load adjustment factors for 1 / 2-in . diameter Hilti KH-EZ and KH-EZ CRC in cracked concrete 1 , 2
Edge distance in shear
3.3.6
1 / 2-in . KH-EZ cracked 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
II to and away from edge
ƒ RV
Conc . thickness factor in shear 4
ƒ HV
Embedment h nom
in .
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
2-1 / 4
3
4-1 / 4
( mm )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
( 57 )
( 76 )
( 108 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.82
0.66
0.55
n / a
n / a
n / a
0.45
0.28
0.08
0.82
0.57
0.17
n / a
n / a
n / a
2
( 51 )
n / a
n / a
n / a
0.90
0.72
0.58
n / a
n / a
n / a
0.55
0.35
0.10
0.90
0.70
0.21
n / a
n / a
n / a
2-1 / 2
( 64 )
n / a
n / a
n / a
1.00
0.83
0.65
n / a
n / a
n / a
0.77
0.49
0.14
1.00
0.83
0.29
n / a
n / a
n / a
3
( 76 )
0.83
0.73
0.66
1.00
0.94
0.72
0.67
0.62
0.56
1.00
0.64
0.19
1.00
0.94
0.38
n / a
n / a
n / a
3-1 / 2
( 89 )
0.88
0.77
0.68
1.00
0.79
0.70
0.64
0.56
0.80
0.24
1.00
0.48
n / a
n / a
n / a
4
( 102 )
0.94
0.81
0.71
1.00
0.87
0.72
0.66
0.57
0.98
0.29
1.00
0.59
n / a
n / a
n / a
4-1 / 2
( 114 )
0.99
0.85
0.73
0.95
0.75
0.69
0.58
1.00
0.35
0.70
1.00
n / a
n / a
4-3 / 4
( 121 )
1.00
0.87
0.75
0.99
0.77
0.70
0.59
0.38
0.76
0.88
n / a
5
( 127 )
0.89
0.76
1.00
0.78
0.71
0.59
0.41
0.82
0.91
n / a
6
( 152 )
0.96
0.81
1.00
0.84
0.75
0.61
0.54
1.00
0.99
n / a
6-3 / 4
( 171 )
1.00
0.85
0.88
0.78
0.62
0.64
1.00
0.70
7
( 178 )
0.86
0.89
0.79
0.63
0.68
0.72
8
( 203 )
0.91
0.95
0.83
0.65
0.83
0.77
9
( 229 )
0.97
1.00
0.87
0.67
0.99
0.81
10
( 254 )
1.00
0.91
0.68
1.00
0.86
11
( 279 )
0.95
0.70
0.90
12
( 305 )
0.99
0.72
0.94
14
( 356 )
1.00
0.76
1.00
16
( 406 )
0.79
18
( 457 )
0.83
20
( 508 )
0.87
> 24
( 610 )
0.94
Spacing ( s )/ edge distance ( c a
)/ concrete thickness ( h ) - in . ( mm )
1 Linear interpolation not permitted .
2 When combining multiple load adjustment factors ( e . g . for a 4 anchor pattern in a corner with thin concrete member ) the design can become very conservative . To optimize the design , use Hilti PROFIS Engineering software or perform anchor calculation using design equations from ACI 318 Chapter 17 .
3 Spacing factor reduction in shear , ƒ AV , assumes an influence of a nearby edge . If no edge exists , then ƒ AV
= ƒ AN .
4 Concrete thickness reduction factor in shear , ƒ HV , assumes an influence of a nearby edge . If no edge exists , then ƒ HV
= 1.0 .
If a reduction factor value is in a shaded cell , this indicates that this specific edge distance may not be permitted with a certain spacing ( or vice versa ). Check table 5 and figure 2 of this section to calculate permissable edge distance , spacing and concrete thickness combinations .
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.6 KWIK HUS-EZ SCREW ANCHOR 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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