Anchor Fastening Technical Guide , Edition 22
DESIGN INFORMATION IN CONCRETE PER CSA A23.3
Limit State Design of anchors is described in the provisions of CSA A23.3 Annex D for post-installed anchors tested and assessed in accordance with ACI 355.2 for mechanical anchors and ACI 355.4 for adhesive anchors . This section contains the Limit State Design tables with unfactored characteristic loads that are based on the published loads in table 2 of this section . These tables are followed by factored resistance tables . The factored resistance tables have characteristic design loads that are prefactored by the applicable reduction factors for a single anchor with no anchor-to-anchor spacing or edge distance adjustments for the convenience of the user of this document . All the figures in the previous ACI 318 Chapter 17 design section are applicable to Limit State Design and the tables will reference these figures .
For a detailed explanation of the tables developed in accordance with CSA A23.3 Annex D , refer to Section 3.1.8 . Technical assistance is available by contacting Hilti Canada at ( 800 ) 363-4458 or at www . hilti . com .
Table 9 — Steel resistance for Hilti KWIK HUS screw anchor 1 , 2
Anchor diameter in .
3 / 8
1 / 2
5 / 8
3 / 4
Nominal embedment in . ( mm )
1-5 / 8 ( 41 )
Tensile N sar
3 lb ( kN )
Shear V sar
4 lb ( kN )
2-1 / 2 5,480 2,850 ( 64 ) ( 24.4 ) ( 12.7 ) 3-1 / 4 ( 83 ) 2-1 / 4 ( 57 ) 3 9,280 4,525 ( 76 ) ( 41.3 ) ( 20.1 ) 4-1 / 4 ( 108 ) 3-1 / 4 ( 83 ) 14,405 6,200 5 ( 64.1 ) ( 27.6 )
( 127 )
4 ( 102 ) 19,050 9,205 6-1 / 4 ( 84.7 ) ( 40.9 ) ( 159 )
1 See Section 3.1.8 to convert factored resistance value to ASD value . 2 Hilti KWIK HUS screw anchors are to be considered brittle steel elements . 3 Tensile N sar
= A se , N ф s f uta
R as noted in CSA A23.3 Annex D . 4 Shear determined by static shear tests with V sar
< A se , V ф s
0.6 f uta R as noted in CSA A23.3 Annex D .
3.3.10
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
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