Anchor Fastening Technical Guide , Edition 22
Table 6 — Load adjustment factors for 1 / 4-in . diameter KH-EZ SS316 and KH-EZ C SS316 in uncracked concrete 1 , 2
Edge distance in shear
1 / 4-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
|
II to edge
ƒ RV
|
Conc . thickness factor in shear 4
ƒ HV
|
Embedment h nom in . 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 ( mm ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 )
Spacing ( s )/ edge distance ( c a
)/ concrete thickness ( h ) - in . ( mm )
1-1 / 2 ( 38 ) 0.710 0.630 0.329 0.244 0.553 0.532 0.177 0.086 0.329 0.171 n / a n / a 2 ( 51 ) 0.780 0.673 0.420 0.288 0.570 0.543 0.272 0.132 0.420 0.264 n / a n / a
2-7 / 8 ( 73 ) 0.903 0.748 0.604 0.373 0.601 0.562 0.469 0.227 0.604 0.373 n / a n / a 3 ( 76 ) 0.920 0.759 0.630 0.389 0.605 0.565 0.500 0.242 0.630 0.389 n / a n / a
3-1 / 4 ( 83 ) 0.955 0.781 0.683 0.421 0.614 0.570 0.564 0.273 0.683 0.421 0.675 n / a 4 ( 102 ) 1.000 0.845 0.840 0.518 0.640 0.586 0.770 0.373 0.840 0.518 0.748 n / a
4-1 / 8 ( 105 ) 0.856 0.867 0.534 0.644 0.589 0.807 0.391 0.867 0.534 0.760 0.597 5 ( 127 ) 0.932 1.000 0.648 0.675 0.608 1.000 0.521 1.000 0.648 0.837 0.657 6 ( 152 ) 1.000 0.777 0.710 0.630 0.685 0.777 0.917 0.720 8 ( 203 ) 1.000 0.780 0.673 1.000 1.000 1.000 0.831 10 ( 254 ) 0.850 0.716 0.929 12 ( 305 ) 0.920 0.759 1.000 > 14 ( 356 ) 0.990 0.802
Table 7 — Load adjustment factors for 1 / 4-in . diameter KH-EZ SS316 and KH-EZ C SS316 in cracked concrete 1 , 2
Edge distance in shear
1 / 4-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
|
II to edge
ƒ RV
|
Conc . thickness factor in shear 4
ƒ HV
|
Embedment h nom in . 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 1-5 / 8 2-1 / 2 ( mm ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 ) ( 41 ) ( 64 )
Spacing ( s )/ edge distance ( c a
)/ concrete thickness ( h ) - in . ( mm )
1-1 / 2 ( 38 ) 0.710 0.630 0.876 0.649 0.590 0.559 0.398 0.212 0.796 0.425 n / a n / a 2 ( 51 ) 0.780 0.673 1.000 0.767 0.620 0.579 0.613 0.327 1.000 0.654 n / a n / a
2-7 / 8 ( 73 ) 0.903 0.748 0.994 0.673 0.614 1.000 0.563 0.994 n / a n / a 3 ( 76 ) 0.920 0.759 1.000 0.680 0.619 0.600 1.000 n / a n / a
3-1 / 4 ( 83 ) 0.955 0.781 0.695 0.629 0.677 0.884 n / a 4 ( 102 ) 1.000 0.845 0.741 0.658 0.924 0.981 n / a
4-1 / 8 ( 105 ) 0.856 0.748 0.663 0.968 0.996 0.808 5 ( 127 ) 0.932 0.801 0.698 1.000 1.000 0.889 6 ( 152 ) 1.000 0.861 0.737 0.974 8 ( 203 ) 0.981 0.816 1.000 10 ( 254 ) 1.000 0.895 12 ( 305 ) 0.974 > 14 ( 356 ) 1.000
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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