Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 412

Figure 3
Anchors not permitted in shaded area
c min , 1 c min , 2
Case 2
Case 1
For a specific edge distance , the permitted spacing is calculated as follows :
( s min , 1 – s min , 2
) s ≥ s min , 2
+ ___________ ( c – c min , 2 )
( c min , 1 – c min , 2
)
spacing s
s design
c min , 1 at s min , 1
c min , 2 at s min , 2
s min , 2 s min , 1
Concrete Edge c designedge distance c
Table 5 — Stainless steel Hilti KWIK Bolt 3 installation parameters 1
Setting
information
Symbol
Units
Effective minimum embedment
Minimum member thickness
Case 1
Case 2
Nominal anchor diameter d o
1 / 4
3 / 8
1 / 2
5 / 8
3 / 4
1
h ef
in .
( mm )
1-1 / 2
( 38 )
2
( 51 )
2
( 51 )
3-1 / 4
( 83 )
3-1 / 8
( 79 )
4
( 102 )
3-3 / 4
( 95 )
5
( 127 )
4
( 102 )
5-3 / 4
( 146 )
h min
in .
( mm )
4
( 102 )
4
( 102 )
5
( 127 )
4
( 102 )
6
( 152 )
6
( 152 )
8
( 203 )
5
( 127 )
6
( 152 )
8
( 203 )
6
( 152 )
8
( 203 )
8
( 203 )
8
( 203 )
10
( 254 )
c min , 1
in .
( mm )
1-3 / 8
( 35 )
2
( 51 )
1-5 / 8
( 41 )
2-1 / 2
( 68 )
1-7 / 8
( 48 )
1-5 / 8
( 41 )
1-5 / 8
( 41 )
3-1 / 4
( 83 )
2-1 / 2
( 64 )
2-1 / 2
( 64 )
3-1 / 4
( 83 )
3
( 76 )
2-7 / 8
( 73 )
3-1 / 2
( 89 )
3
( 76 )
for s min , 1 ≥
in .
1-3 / 4
4
3-5 / 8
5
4-5 / 8
4-1 / 2
4-1 / 4
5-5 / 8
5-1 / 4
5
7
6-7 / 8
6-5 / 8
6-3 / 4
6-3 / 4
( mm )
( 44 )
( 102 )
( 92 )
( 127 )
( 117 )
( 114 )
( 108 )
( 143 )
( 133 )
( 127 )
( 178 )
( 175 )
( 168 )
( 172 )
( 172 )
c min , 2 in . 1-5 / 8 3-1 / 4 2-1 / 2 2-7 / 8 2-3 / 8 2-3 / 8 2-1 / 8 3-7 / 8 3 2-3 / 4 4-1 / 8 3-3 / 4 3-3 / 4 4-1 / 4 3-3 / 4 ( mm ) ( 41 ) ( 83 ) ( 64 ) ( 73 ) ( 60 ) ( 60 ) ( 54 ) ( 98 ) ( 76 ) ( 70 ) ( 105 ) ( 95 ) ( 95 ) ( 108 ) ( 95 ) for s min , 2 ≥
in .
1-1 / 4
2
1-3 / 4
2-1 / 2
2-1 / 4
2-1 / 8
1-7 / 8
3-1 / 8
2-1 / 8
2-1 / 8
4
3-1 / 2
3-1 / 2
5
4-3 / 4
( mm )
( 32 )
( 51 )
( 44 )
( 64 )
( 57 )
( 54 )
( 48 )
( 79 )
( 54 )
( 54 )
( 102 )
( 89 )
( 89 )
( 127 )
( 121 )
1 Linear interpolation is permitted to establish an edge distance and spacing combination between Case 1 and Case 2 . Linear interpolation for a specific edge . distance c , where c min , 1
< c < c min , 2 will determine the permissible spacings .
Table 6 — Load adjustment factors for 1 / 4-in . diameter Hilti KWIK Bolt 3 stainless steel anchor in uncracked concrete 1 , 2
1 / 4-in . KB3 stainless steel uncracked uoncrete
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 .
1-3 / 4
1-3 / 4
1-3 / 4
1-3 / 4
1-3 / 4
1-3 / 4
h nom
( mm )
( 44 )
( 44 )
( 44 )
( 44 )
( 44 )
( 44 )
Spacing ( s ) / edge distance ( c a
) / concrete thickness ( h ) - in . ( mm )
1-1 / 4
( 32 )
0.64
n / a
0.56
n / a
n / a
n / a
1-3 / 8
( 35 )
0.65
0.53
0.57
0.26
0.51
n / a
1-1 / 2
( 38 )
0.67
0.56
0.57
0.29
0.56
n / a
2
( 51 )
0.72
0.68
0.60
0.45
0.68
n / a
3
( 76 )
0.83
1.00
0.65
0.83
1.00
n / a
3-1 / 2
( 89 )
0.89
0.67
1.00
n / a
4
( 102 )
0.94
0.70
0.88
4-1 / 2
( 114 )
1.00
0.72
0.94
5
( 127 )
0.74
0.99
5-1 / 2
( 140 )
0.77
1.00
6
( 152 )
0.79
7
( 178 )
0.84
8
( 203 )
0.89
9
( 229 )
0.94
10
( 254 )
0.99
11
( 279 )
1.00
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 .
408 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