Table 5 — Load adjustment factors for KCC-WF 3 / 8 ” in uncracked concrete 1 , 2
KCC-WF 3 / 8 " 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
Embedment in 1.63 1.63 1.63 1.63 1.63 1.63
h ef
( mm ) ( 41 ) ( 41 ) ( 41 ) ( 41 ) ( 41 ) ( 41 ) Min . conc . thickness h min
( in .) 2-1 / 2 2-1 / 2 2-1 / 2 2-1 / 2 2-1 / 2 2-1 / 2
Spacing ( s ) / Edge Distance ( c a
) / Concrete Thickness ( h ) - in . ( mm )
1-1 / 2 |
( 38 ) |
n / a |
0.713 |
n / a |
0.282 |
0.564 |
n / a |
2 |
( 51 ) |
n / a |
0.859 |
n / a |
0.434 |
0.859 |
n / a |
2-1 / 2 |
( 64 ) |
n / a |
1.000 |
n / a |
0.607 |
1.000 |
0.691 |
2-5 / 8 |
( 67 ) |
0.768 |
|
0.625 |
0.653 |
|
0.708 |
3 |
( 76 ) |
0.807 |
|
0.643 |
0.798 |
|
0.757 |
3-1 / 2 |
( 89 ) |
0.858 |
|
0.667 |
1.000 |
|
0.818 |
4 |
( 102 ) |
0.909 |
|
0.691 |
|
|
0.874 |
4-1 / 2 |
( 114 ) |
0.960 |
|
0.715 |
|
|
0.927 |
5 |
( 127 ) |
1.000 |
|
0.739 |
|
|
0.978 |
5-1 / 2 |
( 140 ) |
|
|
0.763 |
|
|
1.000 |
6 |
( 152 ) |
|
|
0.787 |
|
|
|
7 |
( 178 ) |
|
|
0.834 |
|
|
|
8 |
( 203 ) |
|
|
0.882 |
|
|
|
10 |
( 254 ) |
|
|
0.978 |
|
|
|
12 |
( 305 ) |
|
|
1.000 |
|
|
|
Table 6 — Load adjustment factors for KCC-WF 3 / 8 ” in cracked concrete 1 , 2
KCM-WF 1 / 4 ” -3 / 8 ” 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
Embedment in 1.63 1.63 1.63 1.63 1.63 1.63
h ef
( mm ) ( 41 ) ( 41 ) ( 41 ) ( 41 ) ( 41 ) ( 41 ) Min . conc . thickness h min
( in .) 2-1 / 2 2-1 / 2 2-1 / 2 2-1 / 2 2-1 / 2 2-1 / 2
Spacing ( s ) / Edge Distance ( c a
) / Concrete Thickness ( h ) - in . ( mm )
1-1 / 2 |
( 38 ) |
n / a |
0.713 |
n / a |
0.252 |
0.504 |
n / a |
2 |
( 51 ) |
n / a |
0.859 |
n / a |
0.388 |
0.775 |
n / a |
2-1 / 2 |
( 64 ) |
n / a |
1.000 |
n / a |
0.542 |
1.000 |
0.666 |
2-5 / 8 |
( 67 ) |
0.768 |
|
0.616 |
0.583 |
|
0.682 |
3 |
( 76 ) |
0.807 |
|
0.633 |
0.712 |
|
0.729 |
3-1 / 2 |
( 89 ) |
0.858 |
|
0.655 |
0.897 |
|
0.788 |
4 |
( 102 ) |
0.909 |
|
0.677 |
1.000 |
|
0.842 |
4-1 / 2 |
( 114 ) |
0.960 |
|
0.699 |
|
|
0.893 |
5 |
( 127 ) |
1.000 |
|
0.722 |
|
|
0.941 |
5-1 / 2 |
( 140 ) |
|
|
0.744 |
|
|
0.987 |
6 |
( 152 ) |
|
|
0.766 |
|
|
1.000 |
7 |
( 178 ) |
|
|
0.810 |
|
|
|
8 |
( 203 ) |
|
|
0.854 |
|
|
|
10 |
( 254 ) |
|
|
0.943 |
|
|
|
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 .
464 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