Post-Installed Anchors in Masonry US English | Page 37

Masonry Anchor Strength Design Guide 2024
Table 4 — Hilti HIT-HY 270 adhesive design strength with masonry / bond failure for threaded rod in the face of uncracked fully grouted CMU walls and installed at minimum distance from centerline of hollow head joint 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8
Nominal anchor diameter in .
3 / 8
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 / 8
655
655
655
655
705
705
705
705
( 60 )
( 2.9 )
( 2.9 )
( 2.9 )
( 2.9 )
( 3.1 )
( 3.1 )
( 3.1 )
( 3.1 )
4-1 / 2
1,245
1,245
1,245
1,245
1,205
1,390
1,555
1,700
( 114 )
( 5.5 )
( 5.5 )
( 5.5 )
( 5.5 )
( 5.4 )
( 6.2 )
( 6.9 )
( 7.6 )
6-3 / 4
1,865
1,865
1,865
1,865
1,205
1,390
1,555
1,700
( 171 )
( 8.3 )
( 8.3 )
( 8.3 )
( 8.3 )
( 5.4 )
( 6.2 )
( 6.9 )
( 7.6 )
7-1 / 2
2,070
2,070
2,070
2,070
1,205
1,390
1,555
1,700
( 191 )
( 9.2 )
( 9.2 )
( 9.2 )
( 9.2 )
( 5.4 )
( 6.2 )
( 6.9 )
( 7.6 )
2-3 / 4
710
710
710
710
1,290
1,490
1,665
1,810
( 70 )
( 3.2 )
( 3.2 )
( 3.2 )
( 3.2 )
( 5.7 )
( 6.6 )
( 7.4 )
( 8.1 )
4-1 / 2
1,165
1,165
1,165
1,165
1,390
1,605
1,795
1,965
( 114 )
( 5.2 )
( 5.2 )
( 5.2 )
( 5.2 )
( 6.2 )
( 7.1 )
( 8.0 )
( 8.7 )
6-3 / 4
1,745
1,745
1,745
1,745
1,390
1,605
1,795
1,965
( 171 )
( 7.8 )
( 7.8 )
( 7.8 )
( 7.8 )
( 6.2 )
( 7.1 )
( 8.0 )
( 8.7 )
10
2,585
2,585
2,585
2,585
1,390
1,605
1,795
1,965
( 254 )
( 11.5 )
( 11.5 )
( 11.5 )
( 11.5 )
( 6.2 )
( 7.1 )
( 8.0 )
( 8.7 )
3-1 / 8
915
915
915
915
1,415
1,635
1,825
2,000
( 79 )
( 4.1 )
( 4.1 )
( 4.1 )
( 4.1 )
( 6.3 )
( 7.3 )
( 8.1 )
( 8.9 )
4-1 / 2
1,315
1,315
1,315
1,315
1,520
1,755
1,965
2,150
( 114 )
( 5.8 )
( 5.8 )
( 5.8 )
( 5.8 )
( 6.8 )
( 7.8 )
( 8.7 )
( 9.6 )
6-3 / 4
1,975
1,975
1,975
1,975
1,555
1,795
2,005
2,195
( 171 )
( 8.8 )
( 8.8 )
( 8.8 )
( 8.8 )
( 6.9 )
( 8.0 )
( 8.9 )
( 9.8 )
10
2,925
2,925
2,925
2,925
1,555
1,795
2,005
2,195
( 254 )
( 13.0 )
( 13.0 )
( 13.0 )
( 13.0 )
( 6.9 )
( 8.0 )
( 8.9 )
( 9.8 )
3-1 / 2
620
620
620
620
1,530
1,575
1,575
1,575
( 89 )
( 2.8 )
( 2.8 )
( 2.8 )
( 2.8 )
( 6.8 )
( 7.0 )
( 7.0 )
( 7.0 )
4-1 / 2
795
795
795
795
1,605
1,855
2,025
2,025
( 114 )
( 3.5 )
( 3.5 )
( 3.5 )
( 3.5 )
( 7.1 )
( 8.3 )
( 9.0 )
( 9.0 )
6-3 / 4
1,190
1,190
1,190
1,190
1,665
1,925
2,150
2,360
( 171 )
( 5.3 )
( 5.3 )
( 5.3 )
( 5.3 )
( 7.4 )
( 8.6 )
( 9.6 )
( 10.5 )
10
1,765
1,765
1,765
1,765
1,665
1,925
2,150
2,360
( 254 )
( 7.9 )
( 7.9 )
( 7.9 )
( 7.9 )
( 7.4 )
( 8.6 )
( 9.6 )
( 10.5 )
1 Linear interpolation between embedment depths and masonry compressive strengths is not permitted .
2 Tabular values are for a single anchor located 2-in from centerline of a hollow head joint with no additional influence from nearby edges or additional anchors . For designs with the influence of nearby edges , different distances to a hollow head joint , 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 The maximum embedment for a 8-in CMU block is 6-3 / 4-in . The maximum embedment for a 10-in CMU block is 8-in . The maximum embedment for a 12-in CMU block is 10-in . 5 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 . 6 Tabular values are for dry masonry conditions . For water saturated masonry conditions , multiply design strength values by : α sat
, 3 / 8-in and 1 / 2-in diameter - α sat
= 1.00 5 / 8-in and 3 / 4-in diameter - α sat
= 0.93 7 Tabular values are for static loads only . Seismic design is not permitted for uncracked masonry . 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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