Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 413

Anchor Fastening Technical Guide , Edition 22
Table 7 — Load adjustment factors for 3 / 8-in . diameter Hilti KWIK Bolt 3 stainless steel anchor in uncracked concrete 1 , 2
3 / 8-in . KB3 stainless steel 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
Concrete thickness factor in shear 4
ƒ HV
Embedment
in .
2-3 / 8
2-3 / 8
2-3 / 8
2-3 / 8
2-3 / 8
2-3 / 8
h nom
( mm )
( 60 )
( 60 )
( 60 )
( 60 )
( 60 )
( 60 )
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ) - in . ( mm )
2
( 51 )
0.67
0.51
0.58
0.35
0.51
n / a
2-1 / 2
( 64 )
0.71
0.60
0.60
0.49
0.60
n / a
3
( 76 )
0.75
0.69
0.62
0.64
0.69
n / a
3-1 / 2
( 89 )
0.79
0.80
0.64
0.81
0.81
n / a
4
( 102 )
0.83
0.91
0.67
0.99
0.99
0.81
4-1 / 2
( 114 )
0.88
1.00
0.69
1.00
1.00
0.86
5
( 127 )
0.92
0.71
0.91
6
( 152 )
1.00
0.75
1.00
7
( 178 )
0.79
8
( 203 )
0.83
9
( 229 )
0.87
10
( 254 )
0.91
11
( 279 )
0.95
12
( 305 )
1.00
14
( 356 )
Table 8 — Load adjustment factors for 1 / 2-in . diameter Hilti KWIK Bolt 3 stainless steel anchor in uncracked concrete 1 , 2
1 / 2-in . KB3 stainless steel 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
Concrete thickness factor in shear 4
ƒ HV
Embedment
in .
2-1 / 4
3-1 / 2
2-1 / 4
3-1 / 2
2-1 / 4
3-1 / 2
2-1 / 4
3-1 / 2
2-1 / 4
3-1 / 2
2-1 / 4
3-1 / 2
h nom
( mm )
( 57 )
( 89 )
( 57 )
( 89 )
( 57 )
( 89 )
( 57 )
( 89 )
( 57 )
( 89 )
( 57 )
( 89 )
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ) - in . ( mm )
1-5 / 8
( 41 )
n / a
n / a
n / a
0.39
n / a
n / a
n / a
0.07
n / a
0.15
n / a
n / a
2
( 51 )
n / a
n / a
n / a
0.42
n / a
n / a
n / a
0.10
n / a
0.20
n / a
n / a
2-1 / 8
( 54 )
n / a
0.61
n / a
0.43
n / a
0.54
n / a
0.11
n / a
0.22
n / a
n / a
2-1 / 2
( 64 )
0.71
0.63
0.54
0.47
0.61
0.55
0.53
0.14
0.54
0.28
n / a
n / a
3
( 76 )
0.75
0.65
0.62
0.52
0.63
0.55
0.70
0.19
0.70
0.37
n / a
n / a
3-1 / 2
( 89 )
0.79
0.68
0.72
0.57
0.65
0.56
0.88
0.23
0.88
0.47
n / a
n / a
4
( 102 )
0.83
0.71
0.82
0.62
0.68
0.57
1.00
0.29
1.00
0.57
0.84
n / a
4-1 / 2
( 114 )
0.88
0.73
0.92
0.68
0.70
0.58
0.34
0.68
0.89
n / a
5
( 127 )
0.92
0.76
1.00
0.74
0.72
0.59
0.40
0.74
0.94
n / a
6
( 152 )
1.00
0.81
0.89
0.76
0.61
0.53
0.89
1.00
0.66
7
( 178 )
0.86
1.00
0.81
0.63
0.66
1.00
0.71
8
( 203 )
0.91
0.85
0.64
0.81
0.76
9
( 229 )
0.96
0.89
0.66
0.97
0.81
10
( 254 )
1.00
0.94
0.68
1.00
0.85
11
( 279 )
0.98
0.70
0.89
12
( 305 )
1.00
0.72
0.93
14
( 356 )
0.75
1.00
16
( 406 )
0.79
18
( 457 )
0.83
20
( 508 )
0.86
> 24
( 610 )
0.93
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 PROFIS Engineering 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 13 and figure 3 of this section to calculate permissable edge distance , spacing and concrete thickness combinations . Use of Hilti KWIK Bolt 3 anchors with edge distance and spacing dimensions smaller than what is noted in this table is permitted .
3.3.11
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.11 KWIK Bolt 3 ( KB 3 ) CARBON AND STAINLESS 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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