Anchor Fastening Technical Guide , Edition 22
Table 10 — Load adjustment factors for 1 / 2-in . diameter KH-EZ SS316 in uncracked concrete 1 , 2
1 / 2-in . KH-EZ SS316 uncracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 3
ƒ AV
⊥ toward edge
ƒ RV
Edge distance in shear
II to edge
ƒ RV
Conc . thickness factor in shear 4
ƒ HV
Embedment |
in . |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
h nom
|
( mm ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
Spacing ( s )/ edge distance ( c a
)/ concrete thickness ( h ) - in . ( mm )
1-3 / 4 ( 44 ) n / a n / a n / a 0.303 0.247 0.357 n / a n / a n / a 0.149 0.089 0.073 0.297 0.177 0.147 n / a n / a n / a 2 ( 51 ) n / a n / a n / a 0.333 0.266 0.378 n / a n / a n / a 0.181 0.108 0.090 0.333 0.217 0.179 n / a n / a n / a 3 ( 76 ) 0.821 0.727 0.653 0.481 0.348 0.465 0.580 0.557 0.550 0.333 0.199 0.165 0.481 0.348 0.330 n / a n / a n / a 4 ( 102 ) 0.927 0.803 0.704 0.641 0.455 0.560 0.607 0.576 0.567 0.513 0.306 0.254 0.641 0.455 0.508 n / a n / a n / a 4-1 / 2 ( 114 ) 0.981 0.841 0.730 0.721 0.511 0.611 0.620 0.585 0.575 0.612 0.366 0.303 0.721 0.511 0.606 0.693 n / a n / a 4-3 / 4 ( 121 ) 1.000 0.860 0.743 0.761 0.540 0.637 0.627 0.590 0.579 0.664 0.397 0.328 0.761 0.540 0.637 0.712 0.600 n / a 5 ( 127 ) 0.879 0.756 0.801 0.568 0.667 0.634 0.595 0.584 0.717 0.428 0.355 0.801 0.568 0.667 0.731 0.615 n / a 6 ( 152 ) 0.955 0.807 0.962 0.682 0.800 0.660 0.614 0.600 0.943 0.563 0.466 0.962 0.682 0.800 0.801 0.674 n / a
6-3 / 4 ( 171 ) 1.000 0.845 1.000 0.767 0.900 0.680 0.628 0.613 1.000 0.672 0.556 1.000 0.767 0.900 0.849 0.715 0.672 8 ( 203 ) 0.909 0.909 1.000 0.714 0.652 0.634 0.867 0.718 0.909 1.000 0.925 0.778 0.731 10 ( 254 ) 1.000 1.000 0.767 0.689 0.667 1.000 1.000 1.000 1.000 0.870 0.817 12 ( 305 ) 0.821 0.727 0.700 0.953 0.895 16 ( 406 ) 0.927 0.803 0.767 1.000 1.000 20 ( 508 ) 1.000 0.879 0.834 > 24 ( 610 ) 0.955 0.901
Table 11 — Load adjustment factors for 1 / 2-in . diameter KH-EZ SS316 in cracked concrete 1 , 2
1 / 2-in . KH-EZ SS316 cracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 3
ƒ AV
⊥ toward edge
ƒ RV
Edge distance in shear
II to edge
ƒ RV
Conc . thickness factor in shear 4
ƒ HV
Embedment |
in . |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
2-1 / 4 |
3 |
4-1 / 4 |
h nom
|
( mm ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
( 57 ) |
( 76 ) |
( 108 ) |
Spacing ( s )/ edge distance ( c a
)/ concrete thickness ( h ) - in . ( mm )
1-3 / 4 ( 44 ) n / a n / a n / a 0.808 0.657 0.548 n / a n / a n / a 0.352 0.225 0.067 0.703 0.450 0.135 n / a n / a n / a 2 ( 51 ) n / a n / a n / a 0.887 0.708 0.580 n / a n / a n / a 0.430 0.275 0.082 0.859 0.550 0.165 n / a n / a n / a 3 ( 76 ) 0.821 0.727 0.653 1.000 0.929 0.713 0.642 0.606 0.547 0.789 0.505 0.151 1.000 0.929 0.303 n / a n / a n / a 4 ( 102 ) 0.927 0.803 0.704 1.000 0.859 0.690 0.641 0.563 1.000 0.777 0.233 1.000 0.466 n / a n / a n / a 4-1 / 2 ( 114 ) 0.981 0.841 0.730 0.937 0.714 0.658 0.571 0.927 0.278 1.000 0.556 0.924 n / a n / a 4-3 / 4 ( 121 ) 1.000 0.860 0.743 0.977 0.725 0.667 0.575 1.000 0.302 1.000 0.603 0.949 0.818 n / a 5 ( 127 ) 0.879 0.756 1.000 0.737 0.676 0.579 0.326 0.651 0.974 0.839 n / a 6 ( 152 ) 0.955 0.807 0.785 0.711 0.595 0.428 0.856 1.000 0.919 n / a
6-3 / 4 ( 171 ) 1.000 0.845 0.820 0.738 0.607 0.511 1.000 0.975 0.653 8 ( 203 ) 0.909 0.880 0.782 0.626 0.659 1.000 0.711 10 ( 254 ) 1.000 0.974 0.852 0.658 0.921 0.794 12 ( 305 ) 1.000 0.923 0.689 1.000 0.870 16 ( 406 ) 1.000 0.752 1.000 20 ( 508 ) 0.816 > 24 ( 610 ) 0.879
3.3.7
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 table 5 and figure 2 of this document to calculate permissable edge distance , spacing and concrete thickness combinations .
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.7 KWIK HUS-EZ SS316 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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