DESIGN INFORMATION IN CONCRETE PER ACI 318
ACI 318 Chapter 17 design
The technical data contained in this section are Hilti Simplified Design Tables . The load values were developed using the Strength Design equations of ACI 318 Chapter 17 . KWIK HUS anchor were tested and the test results were evaluated in accordance with ACI 355.2 and AC193 . An ICC-ES evaluation report was not published with this information . For a detailed explanation of the Hilti Simplified Design Tables , refer to section 3.1.8 .
Table 2 — Hilti KWIK HUS design strength with concrete / pullout failure in uncracked concrete 1 , 2 , 3 , 4 , 5
Nominal anchor diameter
3 / 8
1 / 2
5 / 8
3 / 4
Nominal embed . in . ( mm ) ƒ ' c
= 2,500 psi lb ( kN )
Tension - фN n ƒ ' c = 3,000 psi ƒ ' c
= 4,000 psi lb ( kN ) lb ( kN ) ƒ ' c
= 6,000 psi lb ( kN ) ƒ ' c
= 2,500 psi lb ( kN )
Shear - фV n ƒ ' c = 3,000 psi ƒ ' c
= 4,000 psi lb ( kN ) lb ( kN ) ƒ ' c
= 6,000 psi lb ( kN )
1-5 / 8 910 1,000 1,155 1,415 980 1,075 1,245 1,520 ( 41 ) ( 4.0 ) ( 4.4 ) ( 5.1 ) ( 6.3 ) ( 4.4 ) ( 4.8 ) ( 5.5 ) ( 6.8 ) 2-1 / 2 1,980 2,165 2,505 3,065 2,130 2,335 2,695 3,300 ( 64 ) ( 8.8 ) ( 9.6 ) ( 11.1 ) ( 13.6 ) ( 9.5 ) ( 10.4 ) ( 12.0 ) ( 14.7 ) 3-1 / 4 2,545 2,790 3,220 3,945 2,740 3,005 3,465 4,245 ( 83 ) ( 11.3 ) ( 12.4 ) ( 14.3 ) ( 17.5 ) ( 12.2 ) ( 13.4 ) ( 15.4 ) ( 18.9 ) 2-1 / 4 1,460 1,600 1,850 2,265 1,575 1,725 1,990 2,440 ( 57 ) ( 6.5 ) ( 7.1 ) ( 8.2 ) ( 10.1 ) ( 7.0 ) ( 7.7 ) ( 8.9 ) ( 10.9 ) 3 2,475 2,710 3,130 3,835 2,665 2,920 3,375 4,130 ( 76 ) ( 11.0 ) ( 12.1 ) ( 13.9 ) ( 17.1 ) ( 11.9 ) ( 13.0 ) ( 15.0 ) ( 18.4 ) 4-1 / 4 4,505 4,935 5,700 6,980 9,705 10,635 12,280 15,040 ( 108 ) ( 20.0 ) ( 22.0 ) ( 25.4 ) ( 31.0 ) ( 43.2 ) ( 47.3 ) ( 54.6 ) ( 66.9 ) 3-1 / 4 3,240 3,550 4,100 5,025 3,490 3,825 4,415 5,410 ( 83 ) ( 14.4 ) ( 15.8 ) ( 18.2 ) ( 22.4 ) ( 15.5 ) ( 17.0 ) ( 19.6 ) ( 24.1 ) 5 6,705 7,345 8,485 10,390 14,445 15,825 18,270 22,380
( 127 ) ( 29.8 ) ( 32.7 ) ( 37.7 ) ( 46.2 ) ( 64.3 ) ( 70.4 ) ( 81.3 ) ( 99.6 )
4 4,380 4,795 5,540 6,785 9,430 10,330 11,930 14,610 ( 102 ) ( 19.5 ) ( 21.3 ) ( 24.6 ) ( 30.2 ) ( 41.9 ) ( 45.9 ) ( 53.1 ) ( 65.0 ) 6-1 / 4 9,345 10,235 11,820 14,475 20,125 22,045 25,455 31,175 ( 159 ) ( 41.6 ) ( 45.5 ) ( 52.6 ) ( 64.4 ) ( 89.5 ) ( 98.1 ) ( 113.2 ) ( 138.7 )
1 See section 3.1.8 to convert design strength value to ASD value . 2 Linear interpolation between embedment depths and concrete compressive strengths is not permitted .
3 Apply spacing , edge distance , and concrete thickness factors in tables 4 to 7 as necessary . Compare to steel values in table 3 . The lesser of the values is to be used for the design .
4 Tabular values are for normal-weight concrete only . For lightweight concrete multiply design strength by λ a as follows : for sand-lightweight , λ a = 0.68 ; for all-lightweight , λ a
= 0.60 5 Tabular values are for static loads only . Seismic design is not permitted for uncracked concrete .
Figure 2 |
Anchors not permitted in shaded area
c min , 1 c min , 2
Case 2
Case 1
|
For a specific edge distance , the permitted spacing is calculated as follows :
( s min , 1 – s min , 2
) s ≥ s min , 2
+ ___________ ( c – c min , 2 )
( c min , 1 – c min , 2
)
|
spacing s
s design
|
c min , 1 at s min , 1
|
c min , 2 at s min , 2
|
s min , 2 s min , 1
Concrete Edge c designedge distance c
394 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.10 KWIK HUS ( KH ) CARBON STEEL 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