Product Technical Guides : CA-EN Anchor Fastening - Volume 2 Edition 21 | Page 469

Anchor Fastening Technical Guide , Edition 22
Table 7 — Load adjustment factors for KCC-WF 1 / 2 ” in uncracked concrete 1 , 2
KCM-WF 1 / 2 ” 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
‖ To edge
ƒ RV
Concrete thickness factor
4 in shear
ƒ HV
Spacing ( s ) / Edge Distance ( c a
) / Concrete Thickness ( h ) - in . ( mm )
Embedment in 2.04 2.04 2.04 2.04 2.04 2.04
h ef
( mm ) ( 52 ) ( 52 ) ( 52 ) ( 52 ) ( 52 ) ( 52 )
1-1 / 2
( 38 )
n / a
0.631
n / a
0.281
0.561
n / a
2
( 51 )
n / a
0.741
n / a
0.432
0.741
n / a
2-1 / 2
( 64 )
n / a
0.859
n / a
0.604
0.859
n / a
3
( 76 )
n / a
0.984
n / a
0.794
0.984
0.756
3-1 / 2
( 89 )
0.786
1.000
0.667
1.000
1.000
0.817
4
( 102 )
0.827
0.691
0.873
4-1 / 2
( 114 )
0.868
0.714
0.926
5
( 127 )
0.908
0.738
0.976
5-1 / 2
( 140 )
0.949
0.762
1.000
5-3 / 4
( 146 )
0.970
0.774
6
( 152 )
0.990
0.786
7
( 178 )
1.000
0.833
8
( 203 )
0.881
9
( 229 )
0.929
10
( 254 )
0.976
12
( 305 )
1.000
Table 8 — Load adjustment factors for KCC-WF 1 / 2 ” in cracked concrete 1 , 2
KCM-WF 3 / 8 ” -1 / 2 ” cracked 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
‖ To edge
ƒ RV
Concrete thickness factor
4 in shear ƒ HV
Spacing ( s ) / Edge Distance ( c a
) / Concrete Thickness ( h ) - in . ( mm )
Embedment in 2.04 2.04 2.04 2.04 2.04 2.04
h ef
( mm ) ( 52 ) ( 52 ) ( 52 ) ( 52 ) ( 52 ) ( 52 )
1-1 / 2
( 38 )
n / a
0.631
n / a
0.251
0.501
n / a
2
( 51 )
n / a
0.741
n / a
0.386
0.741
n / a
2-1 / 2
( 64 )
n / a
0.859
n / a
0.539
0.859
n / a
3
( 76 )
n / a
0.984
n / a
0.709
0.984
0.728
3-1 / 2
( 89 )
0.786
1.000
0.655
0.893
1.000
0.786
4
( 102 )
0.827
0.677
1.000
0.841
4-1 / 2
( 114 )
0.868
0.699
0.892
5
( 127 )
0.908
0.721
0.940
5-1 / 2
( 140 )
0.949
0.743
0.986
5-3 / 4
( 146 )
0.970
0.754
1.000
6
( 152 )
0.990
0.765
7
( 178 )
1.000
0.809
8
( 203 )
0.853
9
( 229 )
0.898
10
( 254 )
0.942
12
( 305 )
1.000
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 ( or CSA A23.3 ( R2014 ) Annex D ). 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 .
3.3.17 3.3.17
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.17 KCC-WF AND KCC-MD CAST-IN 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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