Masonry Anchor Strength Design Guide 2024
Table 12 — Hilti HIT-HY 270 adhesive design strength with masonry / bond failure for rebar 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
Rebar Size
# 4
# 5
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 |
500 |
500 |
500 |
500 |
1,225 |
1,280 |
1,280 |
1,280 |
( 70 ) |
( 2.2 ) |
( 2.2 ) |
( 2.2 ) |
( 2.2 ) |
( 5.4 ) |
( 5.7 ) |
( 5.7 ) |
( 5.7 ) |
4-1 / 2 |
820 |
820 |
820 |
820 |
1,320 |
1,520 |
1,700 |
1,865 |
( 114 ) |
( 3.6 ) |
( 3.6 ) |
( 3.6 ) |
( 3.6 ) |
( 5.9 ) |
( 6.8 ) |
( 7.6 ) |
( 8.3 ) |
6-3 / 4 |
1,230 |
1,230 |
1,230 |
1,230 |
1,320 |
1,520 |
1,700 |
1,865 |
( 171 ) |
( 5.5 ) |
( 5.5 ) |
( 5.5 ) |
( 5.5 ) |
( 5.9 ) |
( 6.8 ) |
( 7.6 ) |
( 8.3 ) |
10 |
1,825 |
1,825 |
1,825 |
1,825 |
1,320 |
1,520 |
1,700 |
1,865 |
( 254 ) |
( 8.1 ) |
( 8.1 ) |
( 8.1 ) |
( 8.1 ) |
( 5.9 ) |
( 6.8 ) |
( 7.6 ) |
( 8.3 ) |
3-1 / 8 |
390 |
390 |
390 |
390 |
995 |
995 |
995 |
995 |
( 79 ) |
( 1.7 ) |
( 1.7 ) |
( 1.7 ) |
( 1.7 ) |
( 4.4 ) |
( 4.4 ) |
( 4.4 ) |
( 4.4 ) |
4-1 / 2 |
565 |
565 |
565 |
565 |
1,435 |
1,435 |
1,435 |
1,435 |
( 114 ) |
( 2.5 ) |
( 2.5 ) |
( 2.5 ) |
( 2.5 ) |
( 6.4 ) |
( 6.4 ) |
( 6.4 ) |
( 6.4 ) |
6-3 / 4 |
845 |
845 |
845 |
845 |
1,475 |
1,700 |
1,905 |
2,085 |
( 171 ) |
( 3.8 ) |
( 3.8 ) |
( 3.8 ) |
( 3.8 ) |
( 6.6 ) |
( 7.6 ) |
( 8.5 ) |
( 9.3 ) |
10 |
1,250 |
1,250 |
1,250 |
1,250 |
1,475 |
1,700 |
1,905 |
2,085 |
( 254 ) |
( 5.6 ) |
( 5.6 ) |
( 5.6 ) |
( 5.6 ) |
( 6.6 ) |
( 7.6 ) |
( 8.5 ) |
( 9.3 ) |
1 Linear interpolation between embedment depths and masonry compressive strengths is not permitted .
2 Tabular values are for a single anchor located 1-3 / 4-in 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
, # 4 rebar - α sat
= 1.00 # 5 rebar - 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 by 0.50 . 8 Tabular values are for short term loads only . For sustained loads including overhead use , see Section 3.0 .
Table 13 — Hilti HIT-HY 270 adhesive design strength with masonry / bond failure for rebar in the top of cracked fully grouted CMU walls and installed at minimum edge distance parallel with masonry course 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8
Rebar Size
# 4
# 5
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 |
235 |
235 |
235 |
235 |
600 |
600 |
600 |
600 |
( 70 ) |
( 1.0 ) |
( 1.0 ) |
( 1.0 ) |
( 1.0 ) |
( 2.7 ) |
( 2.7 ) |
( 2.7 ) |
( 2.7 ) |
4-1 / 2 |
385 |
385 |
385 |
385 |
940 |
985 |
985 |
985 |
( 114 ) |
( 1.7 ) |
( 1.7 ) |
( 1.7 ) |
( 1.7 ) |
( 4.2 ) |
( 4.4 ) |
( 4.4 ) |
( 4.4 ) |
6-3 / 4 |
580 |
580 |
580 |
580 |
940 |
1,085 |
1,215 |
1,330 |
( 171 ) |
( 2.6 ) |
( 2.6 ) |
( 2.6 ) |
( 2.6 ) |
( 4.2 ) |
( 4.8 ) |
( 5.4 ) |
( 5.9 ) |
10 |
860 |
860 |
860 |
860 |
940 |
1,085 |
1,215 |
1,330 |
( 254 ) |
( 3.8 ) |
( 3.8 ) |
( 3.8 ) |
( 3.8 ) |
( 4.2 ) |
( 4.8 ) |
( 5.4 ) |
( 5.9 ) |
3-1 / 8 |
230 |
230 |
230 |
230 |
590 |
590 |
590 |
590 |
( 79 ) |
( 1.0 ) |
( 1.0 ) |
( 1.0 ) |
( 1.0 ) |
( 2.6 ) |
( 2.6 ) |
( 2.6 ) |
( 2.6 ) |
4-1 / 2 |
335 |
335 |
335 |
335 |
845 |
845 |
845 |
845 |
( 114 ) |
( 1.5 ) |
( 1.5 ) |
( 1.5 ) |
( 1.5 ) |
( 3.8 ) |
( 3.8 ) |
( 3.8 ) |
( 3.8 ) |
6-3 / 4 |
500 |
500 |
500 |
500 |
1,055 |
1,215 |
1,270 |
1,270 |
( 171 ) |
( 2.2 ) |
( 2.2 ) |
( 2.2 ) |
( 2.2 ) |
( 4.7 ) |
( 5.4 ) |
( 5.6 ) |
( 5.6 ) |
10 |
740 |
740 |
740 |
740 |
1,055 |
1,215 |
1,360 |
1,490 |
( 254 ) |
( 3.3 ) |
( 3.3 ) |
( 3.3 ) |
( 3.3 ) |
( 4.7 ) |
( 5.4 ) |
( 6.0 ) |
( 6.6 ) |
1 Linear interpolation between embedment depths and masonry compressive strengths is not permitted .
2 Tabular values are for a single anchor located 1-3 / 4-in 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
, # 4 rebar - α sat
= 1.00 # 5 rebar - α sat
= 0.93
6 Tabular values are for static loads only . For seismic loads , multiply design strength values in tension and shear by the following reduction factors : # 4 rebar = 0.74 # 5 rebar = 0.74
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 by 0.50 .
8 Tabular values are for short term loads only . For sustained loads including overhead use , see Section 3.0 .
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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