Masonry Anchor Strength Design Guide 2024
Table 2 — Hilti KH-EZ SS316 and KH-EZ C SS316 design strength with masonry failure modes in the face of uncracked fully grouted CMU walls 1 , 2 , 3 , 4
Nominal anchor diameter in .
1 / 4
3 / 8
1 / 2
Effective embedment in . ( mm ) f ́m = 1500 psi ( 10.3 MPa ) lb ( kN )
Tension ( lesser of breakout / pullout ) - ФN n
f ́m = 2000 psi ( 13.8 MPa ) lb ( kN ) f ́m = 2500 psi ( 17.2 MPa ) lb ( kN ) f ́m = 3000 psi ( 20.7 MPa ) lb ( kN ) f ́m = 1500 psi ( 10.3 MPa ) lb ( kN )
Shear ( lesser of pryout or crushing ) - ФV n
f ́m = 2000 psi ( 13.8 MPa ) lb ( kN ) f ́m = 2500 psi ( 17.2 MPa ) lb ( kN ) f ́m = 3000 psi ( 20.7 MPa ) lb ( kN )
1.19 |
195 |
195 |
195 |
195 |
600 |
690 |
770 |
845 |
( 30 ) |
( 0.9 ) |
( 0.9 ) |
( 0.9 ) |
( 0.9 ) |
( 2.7 ) |
( 3.1 ) |
( 3.4 ) |
( 3.8 ) |
1.93 |
420 |
420 |
420 |
420 |
1,235 |
1,425 |
1,595 |
1,750 |
( 49 ) |
( 1.9 ) |
( 1.9 ) |
( 1.9 ) |
( 1.9 ) |
( 5.5 ) |
( 6.3 ) |
( 7.1 ) |
( 7.8 ) |
1.49 |
515 |
515 |
515 |
515 |
840 |
970 |
1,080 |
1,185 |
( 38 ) |
( 2.3 ) |
( 2.3 ) |
( 2.3 ) |
( 2.3 ) |
( 3.7 ) |
( 4.3 ) |
( 4.8 ) |
( 5.3 ) |
2.55 |
1,475 |
1,705 |
1,875 |
1,875 |
3,015 |
3,240 |
3,425 |
3,585 |
( 65 ) |
( 6.6 ) |
( 7.6 ) |
( 8.3 ) |
( 8.3 ) |
( 13.4 ) |
( 14.4 ) |
( 15.2 ) |
( 15.9 ) |
1.56 |
705 |
815 |
875 |
875 |
900 |
1,035 |
1,160 |
1,270 |
( 40 ) |
( 3.1 ) |
( 3.6 ) |
( 3.9 ) |
( 3.9 ) |
( 4.0 ) |
( 4.6 ) |
( 5.2 ) |
( 5.6 ) |
3.26 |
2,130 |
2,460 |
2,635 |
2,635 |
3,505 |
3,770 |
3,985 |
4,170 |
( 83 ) |
( 9.5 ) |
( 10.9 ) |
( 11.7 ) |
( 11.7 ) |
( 15.6 ) |
( 16.8 ) |
( 17.7 ) |
( 18.5 ) |
1 Linear interpolation between embedment depths and masonry compressive strengths is not permitted . 2 Tabular values are for a single anchor with no influence from nearby edges , hollow head joints , or additional anchors . For designs with the influence of nearby edges , hollow head joints , or additional anchors , use Hilti PROFIS Engineering Design software or perform anchor calculation using design equations from AC01 . 3 Compare masonry tabular values to the steel values in Table 8 . The lesser of the values is to be used for the design . 4 Tabular values are for static loads only . Seismic design is not permitted for uncracked masonry .
Table 3 — Hilti KH-EZ SS316 and KH-EZ C SS316 design strength with masonry failure modes in the face of cracked fully grouted CMU walls 1 , 2 , 3 , 4
Nominal anchor diameter in .
1 / 4
3 / 8
1 / 2
Effective embedment in . ( mm ) f ́m = 1500 psi ( 10.3 MPa ) lb ( kN )
Tension ( lesser of breakout / pullout ) - ФN n
f ́m = 2000 psi ( 13.8 MPa ) lb ( kN ) f ́m = 2500 psi ( 17.2 MPa ) lb ( kN ) f ́m = 3000 psi ( 20.7 MPa ) lb ( kN ) f ́m = 1500 psi ( 10.3 MPa ) lb ( kN )
Shear ( lesser of pryout or crushing ) - ФV n
f ́m = 2000 psi ( 13.8 MPa ) lb ( kN ) f ́m = 2500 psi ( 17.2 MPa ) lb ( kN ) f ́m = 3000 psi ( 20.7 MPa ) lb ( kN )
1.19 |
90 |
90 |
90 |
90 |
420 |
490 |
545 |
595 |
( 30 ) |
( 0.4 ) |
( 0.4 ) |
( 0.4 ) |
( 0.4 ) |
( 1.9 ) |
( 2.2 ) |
( 2.4 ) |
( 2.6 ) |
1.93 |
185 |
185 |
185 |
185 |
870 |
1,005 |
1,125 |
1,235 |
( 49 ) |
( 0.8 ) |
( 0.8 ) |
( 0.8 ) |
( 0.8 ) |
( 3.9 ) |
( 4.5 ) |
( 5.0 ) |
( 5.5 ) |
1.49 |
210 |
210 |
210 |
210 |
590 |
685 |
765 |
835 |
( 38 ) |
( 0.9 ) |
( 0.9 ) |
( 0.9 ) |
( 0.9 ) |
( 2.6 ) |
( 3.0 ) |
( 3.4 ) |
( 3.7 ) |
2.55 |
770 |
770 |
770 |
770 |
2,650 |
3,060 |
3,420 |
3,585 |
( 65 ) |
( 3.4 ) |
( 3.4 ) |
( 3.4 ) |
( 3.4 ) |
( 11.8 ) |
( 13.6 ) |
( 15.2 ) |
( 15.9 ) |
1.56 |
500 |
575 |
645 |
690 |
635 |
730 |
820 |
895 |
( 40 ) |
( 2.2 ) |
( 2.6 ) |
( 2.9 ) |
( 3.1 ) |
( 2.8 ) |
( 3.2 ) |
( 3.6 ) |
( 4.0 ) |
3.26 |
1,505 |
1,735 |
1,940 |
2,085 |
3,505 |
3,770 |
3,985 |
4,170 |
( 83 ) |
( 6.7 ) |
( 7.7 ) |
( 8.6 ) |
( 9.3 ) |
( 15.6 ) |
( 16.8 ) |
( 17.7 ) |
( 18.5 ) |
1 Linear interpolation between embedment depths and masonry compressive strengths is not permitted . 2 Tabular values are for a single anchor with no influence from nearby edges , hollow head joints , or additional anchors . For designs with the influence of nearby edges , hollow head joints , or additional anchors , use Hilti PROFIS Engineering Design software or perform anchor calculation using design equations from AC01 . 3 Compare masonry tabular values to the steel values in Table 8 . The lesser of the values is to be used for the design . 4 Tabular values are for static loads only . For seismic loads , multiply design strength values in tension and shear by the following reduction factors : 1 / 4-in diameter = 0.70 3 / 8-in and 1 / 2-in diameters = 0.75
Masonry Fastening Technical Guide Edition 24 | 7.6 KWIK HUS-EZ SS316 SCREW ANCHOR FOR MASONRY 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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