Masonry Anchor Strength Design Guide 2024
Table 6 — Hilti HIT-HY 270 adhesive design strength with masonry / bond failure for threaded rod in the top of uncracked fully grouted CMU walls and installed at minimum edge distance parallel with masonry course 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8
Nominal anchor diameter in .
1 / 2
5 / 8
3 / 4
Effective embedment in . ( mm ) f ́m = 1500 psi ( 10.3 MPa ) lb ( kN )
Tension ( lesser of breakout or bond ) — ΦN 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 )
Shear ( lesser of breakout , pryout , or crushing ) — ΦV n
f ́m = 1500 psi ( 10.3 MPa ) lb ( kN ) 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 )
2-3 / 4 |
405 |
405 |
405 |
405 |
1,030 |
1,030 |
1,030 |
1,030 |
( 70 ) |
( 1.8 ) |
( 1.8 ) |
( 1.8 ) |
( 1.8 ) |
( 4.6 ) |
( 4.6 ) |
( 4.6 ) |
( 4.6 ) |
4-1 / 2 |
660 |
660 |
660 |
660 |
1,320 |
1,520 |
1,685 |
1,685 |
( 114 ) |
( 2.9 ) |
( 2.9 ) |
( 2.9 ) |
( 2.9 ) |
( 5.9 ) |
( 6.8 ) |
( 7.5 ) |
( 7.5 ) |
6-3 / 4 |
995 |
995 |
995 |
995 |
1,320 |
1,520 |
1,700 |
1,865 |
( 171 ) |
( 4.4 ) |
( 4.4 ) |
( 4.4 ) |
( 4.4 ) |
( 5.9 ) |
( 6.8 ) |
( 7.6 ) |
( 8.3 ) |
10 |
1,470 |
1,470 |
1,470 |
1,470 |
1,320 |
1,520 |
1,700 |
1,865 |
( 254 ) |
( 6.5 ) |
( 6.5 ) |
( 6.5 ) |
( 6.5 ) |
( 5.9 ) |
( 6.8 ) |
( 7.6 ) |
( 8.3 ) |
3-1 / 8 |
505 |
505 |
505 |
505 |
1,285 |
1,285 |
1,285 |
1,285 |
( 79 ) |
( 2.2 ) |
( 2.2 ) |
( 2.2 ) |
( 2.2 ) |
( 5.7 ) |
( 5.7 ) |
( 5.7 ) |
( 5.7 ) |
4-1 / 2 |
725 |
725 |
725 |
725 |
1,445 |
1,665 |
1,845 |
1,845 |
( 114 ) |
( 3.2 ) |
( 3.2 ) |
( 3.2 ) |
( 3.2 ) |
( 6.4 ) |
( 7.4 ) |
( 8.2 ) |
( 8.2 ) |
6-3 / 4 |
1,090 |
1,090 |
1,090 |
1,090 |
1,475 |
1,700 |
1,905 |
2,085 |
( 171 ) |
( 4.8 ) |
( 4.8 ) |
( 4.8 ) |
( 4.8 ) |
( 6.6 ) |
( 7.6 ) |
( 8.5 ) |
( 9.3 ) |
10 |
1,610 |
1,610 |
1,610 |
1,610 |
1,475 |
1,700 |
1,905 |
2,085 |
( 254 ) |
( 7.2 ) |
( 7.2 ) |
( 7.2 ) |
( 7.2 ) |
( 6.6 ) |
( 7.6 ) |
( 8.5 ) |
( 9.3 ) |
3-1 / 2 |
810 |
810 |
810 |
810 |
2,055 |
2,055 |
2,055 |
2,055 |
( 89 ) |
( 3.6 ) |
( 3.6 ) |
( 3.6 ) |
( 3.6 ) |
( 9.1 ) |
( 9.1 ) |
( 9.1 ) |
( 9.1 ) |
4-1 / 2 |
1,040 |
1,040 |
1,040 |
1,040 |
2,645 |
2,645 |
2,645 |
2,645 |
( 114 ) |
( 4.6 ) |
( 4.6 ) |
( 4.6 ) |
( 4.6 ) |
( 11.8 ) |
( 11.8 ) |
( 11.8 ) |
( 11.8 ) |
6-3 / 4 |
1,560 |
1,560 |
1,560 |
1,560 |
3,115 |
3,600 |
3,965 |
3,965 |
( 171 ) |
( 6.9 ) |
( 6.9 ) |
( 6.9 ) |
( 6.9 ) |
( 13.9 ) |
( 16.0 ) |
( 17.6 ) |
( 17.6 ) |
10 |
2,310 |
2,310 |
2,310 |
2,310 |
3,115 |
3,600 |
4,020 |
4,405 |
( 254 ) |
( 10.3 ) |
( 10.3 ) |
( 10.3 ) |
( 10.3 ) |
( 13.9 ) |
( 16.0 ) |
( 17.9 ) |
( 19.6 ) |
1 Linear interpolation between embedment depths and masonry compressive strengths is not permitted . 2 Tabular values are for a single anchor located at minimum edge of 1-3 / 4-in ( 2-3 / 4-in for 3 / 4-in diameter ) from edge parallel with masonry course with no additional influence from nearby edges or additional anchors . For designs with the additional influence of nearby edges , a different edge distance , or additional anchors , use Hilti PROFIS Engineering Design software or perform anchor calculation using design equations from AC58 . 3 Compare masonry tabular values to the steel values in the Appendix . The lesser of the values is to be used for the design . 4 Data is for Temperature Range A : Maximum short term temperature = 130 ° F ( 55 ° C ) | Maximum long term temperature = 110 ° F ( 43 ° C ).
For Temperature Range B : Maximum short term temperature = 176 ° F ( 80 ° C ) | Maximum long term temperature = 110 ° F ( 43 ° C ), multiply design strength values by 0.91 . 5 Tabular values are for dry masonry conditions . For water saturated masonry conditions , multiply design strength values by : α sat
, 1 / 2-in diameter - α sat
= 1.00 5 / 8-in and 3 / 4-in diameter - α sat
= 0.93 6 Tabular values are for static loads only . Seismic design is not permitted for uncracked masonry . 7 Tabular shear values are for shear force parallel to the edge parallel with the masonry course . For shear force perpendicular to the edge parallel with the masonry course , multiply design strength values in shear by the following reduction factors : 1 / 2-in and 5 / 8-in . diameter = 0.50 3 / 4-in diameter = 0.46
8 Tabular values are for short term loads only . For sustained loads including overhead use , see Section 3.0 and multiply design strength values in tension and shear by 0.80 .
Masonry Fastening Technical Guide Edition 24 | 7.1 HIT-HY 270 HYBRID FOR MASONRY CONSTRUCTION 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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