Product Technical Guides : CA-EN Anchor Fastening - Volume 2 Edition 21 | Page 401

Anchor Fastening Technical Guide , Edition 22
Table 7 — Load adjustment factors for 3 / 4-in . diameter Hilti KWIK HUS in uncracked concrete 1 , 2
3 / 4-in . KH uncracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 3
ƒ AV
Edge distance in shear
⊥ toward edge
ƒ RV
II to and away from edge
ƒ RV
Conc . thickness factor in shear 4
ƒ HV
Embedment h nom in . 4 6-1 / 4 4 6-1 / 4 4 6-1 / 4 4 6-1 / 4 4 6-1 / 4 4 6-1 / 4 ( mm ) ( 102 ) ( 159 ) ( 102 ) ( 159 ) ( 102 ) ( 159 ) ( 102 ) ( 159 ) ( 102 ) ( 159 ) ( 102 ) ( 159 )
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ) - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
0.57
0.48
n / a
n / a
0.10
0.05
0.19
0.10
n / a
n / a
2
( 51 )
n / a
n / a
0.61
0.50
n / a
n / a
0.12
0.06
0.23
0.12
n / a
n / a
2-1 / 2
( 64 )
n / a
n / a
0.68
0.54
n / a
n / a
0.16
0.08
0.33
0.17
n / a
n / a
3
( 76 )
n / a
n / a
0.76
0.58
n / a
n / a
0.21
0.11
0.43
0.22
n / a
n / a
3-1 / 2
( 89 )
n / a
n / a
0.84
0.62
n / a
n / a
0.27
0.14
0.54
0.28
n / a
n / a
4
( 102 )
0.73
0.64
0.93
0.67
0.58
0.55
0.33
0.17
0.66
0.34
n / a
n / a
4-1 / 2
( 114 )
0.76
0.65
1.00
0.72
0.59
0.56
0.39
0.20
0.79
0.41
n / a
n / a
5
( 127 )
0.79
0.67
0.76
0.60
0.56
0.46
0.24
0.92
0.48
n / a
n / a
5-1 / 2
( 140 )
0.81
0.69
0.81
0.61
0.57
0.53
0.28
1.00
0.55
n / a
n / a
6
( 152 )
0.84
0.71
0.86
0.62
0.58
0.61
0.31
0.63
0.69
n / a
7
( 178 )
0.90
0.74
0.97
0.64
0.59
0.77
0.40
0.79
0.75
n / a
8
( 203 )
0.96
0.78
1.00
0.66
0.60
0.94
0.48
0.97
0.80
n / a
8-1 / 8
( 206 )
0.96
0.78
0.66
0.60
0.96
0.50
0.99
0.80
0.65
9
( 229 )
1.00
0.81
0.68
0.62
1.00
0.58
1.00
0.85
0.68
10
( 254 )
0.84
0.70
0.63
0.68
0.89
0.72
11
( 279 )
0.88
0.72
0.64
0.78
0.94
0.75
12
( 305 )
0.91
0.74
0.65
0.89
0.98
0.79
14
( 356 )
0.98
0.78
0.68
1.00
1.00
0.85
16
( 406 )
1.00
0.82
0.71
0.91
18
( 457 )
0.86
0.73
0.96
20
( 508 )
0.90
0.76
1.00
24
( 610 )
0.98
0.81
30
( 762 )
1.00
0.89
> 36
( 914 )
0.96
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 with table 1 and figure 2 of this section to calculate permissable edge distance , spacing and concrete thickness combinations .
3.3.10
Figure 3 — Installation of Hilti KWIK HUS in soffit of concrete over steel deck floor and roof assemblies 1
1 Anchors may be placed in the upper or lower flute of the steel deck profile provided the minimum concrete cover above the drilled hole is satisfied . Anchors in the lower flute may be installed with a maximum 1-inch offset in either direction from the center of the flute . The offset distance may be increased proportionally for profiles with lower flute widths greater than those shown provided the minimum lower flute edge distance is also satisfied .
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.10 KWIK HUS ( KH ) CARBON STEEL 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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