Post-Installed Anchors in Masonry US English | Page 35

Masonry Anchor Strength Design Guide 2024
Table 2 — Hilti HIT-HY 270 adhesive design strength with masonry / bond failure for threaded rod in the face of uncracked fully grouted CMU walls 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 ) f ́m = 1500 psi ( 10.3 MPa ) lb ( kN )
Shear ( lesser of pryout or crushing ) — ΦV 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 )
2-3 / 8
800
800
800
800
860
860
860
860
( 60 )
( 3.6 )
( 3.6 )
( 3.6 )
( 3.6 )
( 3.8 )
( 3.8 )
( 3.8 )
( 3.8 )
4-1 / 2
1,515
1,515
1,515
1,515
2,875
3,085
3,265
3,265
( 114 )
( 6.7 )
( 6.7 )
( 6.7 )
( 6.7 )
( 12.8 )
( 13.7 )
( 14.5 )
( 14.5 )
6-3 / 4
2,275
2,275
2,275
2,275
2,875
3,085
3,265
3,415
( 171 )
( 10.1 )
( 10.1 )
( 10.1 )
( 10.1 )
( 12.8 )
( 13.7 )
( 14.5 )
( 15.2 )
7-1 / 2
2,525
2,525
2,525
2,525
2,875
3,085
3,265
3,415
( 191 )
( 11.2 )
( 11.2 )
( 11.2 )
( 11.2 )
( 12.8 )
( 13.7 )
( 14.5 )
( 15.2 )
2-3 / 4
1,035
1,035
1,035
1,035
2,630
2,630
2,630
2,630
( 70 )
( 4.6 )
( 4.6 )
( 4.6 )
( 4.6 )
( 11.7 )
( 11.7 )
( 11.7 )
( 11.7 )
4-1 / 2
1,690
1,690
1,690
1,690
3,340
3,590
3,795
3,975
( 114 )
( 7.5 )
( 7.5 )
( 7.5 )
( 7.5 )
( 14.9 )
( 16.0 )
( 16.9 )
( 17.7 )
6-3 / 4
2,535
2,535
2,535
2,535
3,340
3,590
3,795
3,975
( 171 )
( 11.3 )
( 11.3 )
( 11.3 )
( 11.3 )
( 14.9 )
( 16.0 )
( 16.9 )
( 17.7 )
10
3,760
3,760
3,760
3,760
3,340
3,590
3,795
3,975
( 254 )
( 16.7 )
( 16.7 )
( 16.7 )
( 16.7 )
( 14.9 )
( 16.0 )
( 16.9 )
( 17.7 )
3-1 / 8
1,500
1,500
1,500
1,500
3,755
3,825
3,825
3,825
( 79 )
( 6.7 )
( 6.7 )
( 6.7 )
( 6.7 )
( 16.7 )
( 17.0 )
( 17.0 )
( 17.0 )
4-1 / 2
2,165
2,165
2,165
2,165
3,755
4,035
4,265
4,465
( 114 )
( 9.6 )
( 9.6 )
( 9.6 )
( 9.6 )
( 16.7 )
( 17.9 )
( 19.0 )
( 19.9 )
6-3 / 4
3,245
3,245
3,245
3,245
3,755
4,035
4,265
4,465
( 171 )
( 14.4 )
( 14.4 )
( 14.4 )
( 14.4 )
( 16.7 )
( 17.9 )
( 19.0 )
( 19.9 )
10
4,805
4,805
4,805
4,805
3,755
4,035
4,265
4,465
( 254 )
( 21.4 )
( 21.4 )
( 21.4 )
( 21.4 )
( 16.7 )
( 17.9 )
( 19.0 )
( 19.9 )
3-1 / 2
905
905
905
905
2,310
2,310
2,310
2,310
( 89 )
( 4.0 )
( 4.0 )
( 4.0 )
( 4.0 )
( 10.3 )
( 10.3 )
( 10.3 )
( 10.3 )
4-1 / 2
1,165
1,165
1,165
1,165
2,970
2,970
2,970
2,970
( 114 )
( 5.2 )
( 5.2 )
( 5.2 )
( 5.2 )
( 13.2 )
( 13.2 )
( 13.2 )
( 13.2 )
6-3 / 4
1,750
1,750
1,750
1,750
4,140
4,450
4,455
4,455
( 171 )
( 7.8 )
( 7.8 )
( 7.8 )
( 7.8 )
( 18.4 )
( 19.8 )
( 19.8 )
( 19.8 )
10
2,590
2,590
2,590
2,590
4,140
4,450
4,705
4,925
( 254 )
( 11.5 )
( 11.5 )
( 11.5 )
( 11.5 )
( 18.4 )
( 19.8 )
( 20.9 )
( 21.9 )
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 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
35