Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 342

Table 12 — Load adjustment factors for 5 / 8-in . diameter Hilti KH-EZ and KH-EZ CRC in uncracked concrete 1 , 2
5 / 8-in . KH-EZ 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 and away from edge
ƒ RV
Conc . thickness factor in shear 4
ƒ HV
Embedment h nom in . 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 ( mm ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 )
Spacing ( s )/ edge distance ( c a )/ concrete thickness ( h ) - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.622
0.562
0.514
n / a
n / a
n / a
0.235
0.086
0.063
0.470
0.173
0.125
n / a
n / a
n / a
2
( 51 )
n / a
n / a
n / a
0.667
0.596
0.540
n / a
n / a
n / a
0.287
0.106
0.076
0.574
0.211
0.153
n / a
n / a
n / a
2-1 / 2
( 64 )
n / a
n / a
n / a
0.762
0.667
0.592
n / a
n / a
n / a
0.401
0.147
0.107
0.762
0.295
0.214
n / a
n / a
n / a
3
( 76 )
0.709
0.665
0.629
0.863
0.741
0.648
0.609
0.556
0.545
0.528
0.194
0.141
0.863
0.388
0.281
n / a
n / a
n / a
3-1 / 2
( 89 )
0.744
0.693
0.650
0.969
0.819
0.705
0.627
0.565
0.553
0.665
0.244
0.177
0.969
0.488
0.354
n / a
n / a
n / a
4
( 102 )
0.779
0.720
0.672
1.000
0.901
0.764
0.645
0.574
0.560
0.812
0.298
0.216
1.000
0.597
0.433
n / a
n / a
n / a
4-1 / 2
( 114 )
0.814
0.748
0.693
0.987
0.826
0.663
0.584
0.568
0.969
0.356
0.258
0.712
0.516
n / a
n / a
n / a
5
( 127 )
0.849
0.775
0.715
1.000
0.890
0.681
0.593
0.575
1.000
0.417
0.302
0.834
0.605
0.852
n / a
n / a
5-1 / 2
( 140 )
0.884
0.803
0.736
0.956
0.700
0.602
0.583
0.481
0.349
0.962
0.698
0.893
n / a
n / a
6
( 152 )
0.918
0.830
0.758
1.000
0.718
0.612
0.590
0.548
0.398
1.000
0.795
0.933
0.668
n / a
7
( 178 )
0.988
0.885
0.801
0.754
0.630
0.605
0.691
0.501
1.000
1.000
0.722
0.648
8
( 203 )
1.000
0.940
0.844
0.790
0.649
0.620
0.844
0.612
0.772
0.693
9
( 229 )
0.995
0.887
0.827
0.667
0.635
1.000
0.730
0.818
0.735
10
( 254 )
1.000
0.930
0.863
0.686
0.650
0.855
0.863
0.775
11
( 279 )
0.973
0.899
0.705
0.665
0.987
0.905
0.813
12
( 305 )
1.000
0.935
0.723
0.680
1.000
0.945
0.849
14
( 356 )
1.000
0.760
0.710
1.000
0.917
16
( 406 )
0.798
0.740
0.980
18
( 457 )
0.835
0.770
1.000
20
( 508 )
0.872
0.800
24
( 610 )
0.947
0.860
> 30
( 762 )
1.000
0.951
Table 13 — Load adjustment factors for 5 / 8-in . diameter Hilti KH-EZ and KH-EZ CRC in cracked concrete 1 , 2
5 / 8-in . KH-EZ 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 and away from edge
ƒ RV
Conc . thickness factor in shear 4
ƒ HV
Embedment h nom in . 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 3-1 / 4 4 5 ( mm ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 ) ( 83 ) ( 102 ) ( 127 )
Spacing ( s )/ edge distance ( c a )/ concrete thickness ( h ) - in . ( mm )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.630
0.565
0.514
n / a
n / a
n / a
0.267
0.098
0.071
0.533
0.196
0.142
n / a
n / a
n / a
2
( 51 )
n / a
n / a
n / a
0.676
0.599
0.540
n / a
n / a
n / a
0.326
0.120
0.087
0.652
0.239
0.174
n / a
n / a
n / a
2-1 / 2
( 64 )
n / a
n / a
n / a
0.772
0.670
0.592
n / a
n / a
n / a
0.455
0.167
0.121
0.772
0.335
0.243
n / a
n / a
n / a
3
( 76 )
0.709
0.665
0.629
0.873
0.745
0.648
0.618
0.561
0.549
0.599
0.220
0.159
0.873
0.440
0.319
n / a
n / a
n / a
3-1 / 2
( 89 )
0.744
0.693
0.650
0.981
0.824
0.705
0.638
0.571
0.557
0.754
0.277
0.201
0.981
0.554
0.402
n / a
n / a
n / a
4
( 102 )
0.779
0.720
0.672
1.000
0.906
0.764
0.658
0.581
0.565
0.922
0.339
0.245
1.000
0.677
0.491
n / a
n / a
n / a
4-1 / 2
( 114 )
0.814
0.748
0.693
0.992
0.826
0.678
0.591
0.574
1.000
0.404
0.293
0.808
0.586
n / a
n / a
n / a
5
( 127 )
0.849
0.775
0.715
1.000
0.890
0.697
0.601
0.582
1.000
0.473
0.343
0.946
0.686
0.888
n / a
n / a
5-1 / 2
( 140 )
0.884
0.803
0.736
0.956
0.717
0.611
0.590
0.546
0.396
1.000
0.792
0.932
n / a
n / a
6
( 152 )
0.918
0.830
0.758
1.000
0.737
0.621
0.598
0.622
0.451
0.902
0.973
0.697
n / a
7
( 178 )
0.988
0.885
0.801
0.776
0.642
0.614
0.784
0.568
1.000
1.000
0.753
0.676
8
( 203 )
1.000
0.940
0.844
0.816
0.662
0.631
0.958
0.694
0.805
0.723
9
( 229 )
0.995
0.887
0.855
0.682
0.647
1.000
0.828
0.854
0.767
10
( 254 )
1.000
0.930
0.895
0.702
0.663
0.970
0.900
0.808
11
( 279 )
0.973
0.934
0.723
0.680
1.000
0.944
0.848
12
( 305 )
1.000
0.974
0.743
0.696
0.986
0.885
14
( 356 )
1.000
0.783
0.729
1.000
0.956
16
( 406 )
0.824
0.761
1.000
18
( 457 )
0.864
0.794
20
( 508 )
0.905
0.827
24
( 610 )
0.986
0.892
> 30
( 762 )
1.000
0.990
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 with table 5 and figure 2 of this section to calculate permissable edge distance , spacing and concrete thickness combinations .
338 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.6 KWIK HUS-EZ 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