Table 8 — Load adjustment factors for 3 / 8-in . diameter KH-EZ SS316 and KH-EZ C SS316 in uncracked concrete 1 , 2
3 / 8-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 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
h nom
|
( mm ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
Spacing ( s )/ edge distance ( c a
)/ concrete thickness ( h ) - in . ( mm )
1-1 / 2 ( 38 ) 0.668 0.630 0.598 0.282 0.244 0.213 0.542 0.533 0.525 0.126 0.086 0.056 0.253 0.173 0.113 n / a n / a n / a 2 ( 51 ) 0.724 0.674 0.631 0.344 0.289 0.245 0.556 0.543 0.533 0.194 0.133 0.087 0.344 0.266 0.174 n / a n / a n / a
2-1 / 4 ( 57 ) 0.752 0.695 0.647 0.378 0.312 0.261 0.563 0.549 0.537 0.232 0.159 0.104 0.378 0.312 0.207 n / a n / a n / a
3 ( 76 ) 0.836 0.760 0.696 0.503 0.391 0.313 0.584 0.565 0.549 0.357 0.244 0.160 0.503 0.391 0.313 n / a n / a n / a 3-1 / 2 ( 89 ) 0.891 0.804 0.729 0.587 0.456 0.350 0.598 0.576 0.557 0.450 0.308 0.201 0.587 0.456 0.350 0.626 n / a n / a 3-3 / 4 ( 95 ) 0.919 0.826 0.745 0.629 0.488 0.369 0.605 0.581 0.561 0.499 0.341 0.223 0.629 0.488 0.369 0.648 n / a n / a
4 ( 102 ) 0.947 0.847 0.761 0.671 0.521 0.392 0.612 0.587 0.565 0.550 0.376 0.246 0.671 0.521 0.392 0.669 0.589 n / a
4-3 / 4 ( 121 ) 1.000 0.912 0.810 0.797 0.618 0.466 0.633 0.603 0.578 0.711 0.486 0.318 0.797 0.618 0.466 0.729 0.642 0.557 5 ( 127 ) 0.934 0.827 0.839 0.651 0.490 0.640 0.609 0.582 0.768 0.525 0.343 0.839 0.651 0.490 0.748 0.659 0.572 6 ( 152 ) 1.000 0.892 1.000 0.781 0.588 0.668 0.630 0.598 1.000 0.691 0.451 1.000 0.781 0.588 0.819 0.722 0.626 8 ( 203 ) 1.000 1.000 0.784 0.724 0.674 0.631 1.000 0.695 1.000 0.784 0.946 0.833 0.723 10 ( 254 ) 0.980 0.780 0.717 0.663 0.971 0.980 1.000 0.932 0.808 12 ( 305 ) 1.000 0.836 0.760 0.696 1.000 1.000 1.000 0.886 14 ( 356 ) 0.891 0.804 0.729 0.957 16 ( 406 ) 0.947 0.847 0.761 1.000 18 ( 457 ) 1.000 0.891 0.794 20 ( 508 ) 0.934 0.827 > 24 ( 610 ) 1.000 0.892
Table 9 — Load adjustment factors for 3 / 8-in . diameter KH-EZ SS316 and KH-EZ C SS316 in cracked concrete 1 , 2
3 / 8-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 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
2 |
2-1 / 2 |
3-1 / 4 |
h nom
|
( mm ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
( 51 ) |
( 64 ) |
( 83 ) |
Spacing ( s )/ edge distance ( c a
)/ concrete thickness ( h ) - in . ( mm )
1-1 / 2 ( 38 ) 0.668 0.630 0.598 0.753 0.651 0.569 0.580 0.565 0.532 0.336 0.241 0.083 0.671 0.483 0.167 n / a n / a n / a 2 ( 51 ) 0.724 0.674 0.631 0.918 0.770 0.652 0.607 0.586 0.542 0.517 0.372 0.128 0.918 0.743 0.257 n / a n / a n / a
2-1 / 4 ( 57 ) 0.752 0.695 0.647 1.000 0.832 0.696 0.621 0.597 0.548 0.617 0.443 0.153 1.000 0.832 0.307 n / a n / a n / a
3 ( 76 ) 0.836 0.760 0.696 1.000 0.834 0.661 0.629 0.564 0.949 0.683 0.236 1.000 0.472 n / a n / a n / a 3-1 / 2 ( 89 ) 0.891 0.804 0.729 0.933 0.688 0.651 0.574 1.000 0.860 0.297 0.595 0.867 n / a n / a 3-3 / 4 ( 95 ) 0.919 0.826 0.745 0.984 0.701 0.662 0.580 0.954 0.330 0.660 0.897 n / a n / a
4 ( 102 ) 0.947 0.847 0.761 1.000 0.715 0.672 0.585 1.000 0.363 0.727 0.927 0.830 n / a
4-3 / 4 ( 121 ) 1.000 0.912 0.810 0.755 0.705 0.601 0.470 0.941 1.000 0.905 0.635 5 ( 127 ) 0.934 0.827 0.768 0.715 0.606 0.508 1.000 0.928 0.651 6 ( 152 ) 1.000 0.892 0.822 0.758 0.627 0.668 1.000 0.714 8 ( 203 ) 1.000 0.929 0.845 0.670 1.000 0.824 10 ( 254 ) 1.000 0.931 0.712 0.921 12 ( 305 ) 1.000 0.755 1.000 14 ( 356 ) 0.797 16 ( 406 ) 0.840 18 ( 457 ) 0.882 20 ( 508 ) 0.924 > 24 ( 610 ) 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 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 .
358 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