Anchor Fastening Technical Guide , Edition 22
DESIGN DATA IN CONCRETE PER CSA A23.3
CSA A23.3 Annex D Design 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 . Tables 8 and 9 in this section contains the Limit State Design tables that are based on the published loads in ICC Evaluation Services ESR- 4236 and converted for use with CSA A23.3 Annex D . Tables 5 to 7 below are Hilti Simplified Design Tables which are prefactored resistance tables based on the design parameters and variables in Tables 8 and 9 . All the figures in the previous ACI 318 14 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 . ca .
Table 5 — Hilti HDI-P TZ factored resistance based on concrete failure modes in uncracked concrete per CSA A23.3 Annex D 1 , 2 , 3 , 4 , 5
Nominal anchor diameter in . |
Nominal embed . in . ( mm ) |
f ' c = 20 MPa ( 2,900 psi ) lb ( kN )
Tension ( lesser of concrete breakout / pullout ) - N r
f ' c = 25 MPa ( 3,625 psi ) lb ( kN )
f ' c = 30 MPa ( 4,350 psi ) lb ( kN )
f ' c = 40 MPa ( 5,800 psi ) lb ( kN )
|
f ' c = 20 MPa ( 2,900 psi ) lb ( kN )
Shear ( lesser of concrete breakout or pryout ) - V r
f ' c = 25 MPa ( 3,625 psi ) lb ( kN )
f ' c = 30 MPa ( 4,350 psi ) lb ( kN )
f ' c = 40 MPa ( 5,800 psi ) lb ( kN )
|
3 / 8 3 / 4 ( 19 ) 325 ( 1.5 ) 365 ( 1.6 ) 400 ( 1.8 ) 460 ( 2.1 ) 380 ( 1.7 ) 425 ( 1.9 ) 465 ( 2.1 ) 540 ( 2.4 )
Table 6 — Hilti HDI-P TZ factored resistance based on concrete failure modes in cracked concrete per CSA A23.3 Annex D 1 , 2 , 3 , 4 , 5 , 6 , 7
Nominal anchor diameter in . |
Nominal embed . in . ( mm ) |
f ' c = 20 MPa ( 2,900 psi ) lb ( kN )
Tension ( lesser of concrete breakout / pullout ) - N r
f ' c = 25 MPa ( 3,625 psi ) lb ( kN )
f ' c = 30 MPa ( 4,350 psi ) lb ( kN )
f ' c = 40 MPa ( 5,800 psi ) lb ( kN )
|
f ' c = 20 MPa ( 2,900 psi ) lb ( kN )
Shear ( lesser of concrete breakout or pryout ) - V r
f ' c = 25 MPa ( 3,625 psi ) lb ( kN )
f ' c = 30 MPa ( 4,350 psi ) lb ( kN )
f ' c = 40 MPa ( 5,800 psi ) lb ( kN )
|
3 / 8 3 / 4 ( 19 ) 195 ( 0.9 ) 210 ( 0.9 ) 220 ( 1.0 ) 245 ( 1.1 ) 270 ( 1.2 ) 300 ( 1.3 ) 330 ( 1.5 ) 380 ( 1.7 )
The following footnotes apply to both Table 5 and 6 : 1 See Section 3.1.8.6 of the Anchor Tech Guide Ed . 17 to convert design strength value to ASD value . 2 Linear interpolation between concrete compressive strengths is not permitted . 3 Tabular values are for a single anchor with a minimum edge distance of 6-1 / 2-in ( 166mm ) and a minimum spacing of 8-in ( 204mm ). For a 6-in ( 153mm ) edge distance multiply uncracked concrete tension and shear values by 0.92 . No reduction needed for cracked concrete . 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 . For seismic tension loads , multiply cracked concrete tabular values in tension by α N , seis = 0.74 . 6 No additional reduction needed for seismic shear for concrete breakout or pryout failure . See Section 3.1.8.7 of the Anchor Tech Guide Ed . 17 for additional information on seismic applications .
3.3.13
Table 7 — Hilti HDI-P TZ factored resistance based on steel failure per CSA A23.3 Annex D 1 , 2 , 3
Nominal anchor diameter in . |
Tensile 4
N sar lb ( kN )
|
Steel strength of HDI-P TZ anchor
Shear 5
V sar lb ( kN )
Seismic Shear 6 , 9
V sar , eq lb ( kN )
|
Tensile 4
N sar lb ( kN )
Steel strength of ASTM A36 threaded rod
Shear 7
V sar lb ( kN )
Seismic Shear 8 , 9
V sar , eq lb ( kN )
|
3 / 8 3,720 ( 16.5 ) 540 ( 2.4 ) 540 ( 2.4 ) 3,055 ( 13.6 ) 1,720 ( 7.7 ) 1,200 ( 5.3 )
1 See Section 3.1.8.6 of the Anchor Tech Guide Ed . 17 to convert design strength value to ASD value . 2 Steel strength in tension and shear determined from the lesser of the HDI-P TZ or the inserted threaded rod . 3 Hilti HDI-P TZ anchors are considered a brittle steel element . ASTM A36 threaded rod is considered a ductile steel element . 4 Tensile N sar = A se , N φ s f uta as noted in CSA A23.3 Annex D . 5 Shear values for HDI-P TZ determined by static shear tests with V sar ≤ 0.6 A se , V φs f uta R as noted in CSA A23.3 Annex D . 6 Seismic shear values for HDI-P TZ determined by seismic shear tests with V sar , eq ≤ 0.60 A se , V φ s f uta R as noted in CSA A23.3 Annex D . 7 Shear values for threaded rod determined by V sar = 0.6 A se , V φ s f uta R as noted in CSA A23.3 Annex D . 8 Seismic shear values for threaded rod determined by V sar , rod , eq = 0.70 V sar , rod . 9 See Section 3.1.8.7 of the Anchor Tech Guide Ed . 17 for additional information on seismic applications .
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.13 HDI-P TZ FLUSH 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
431