Post-Installed Anchors in Masonry US English | Page 41

Masonry Anchor Strength Design Guide 2024
Table 8 — Hilti HIT-HY 270 adhesive design strength with masonry / bond failure for rebar in the face of uncracked fully grouted CMU walls 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8
Rebar Size
# 3
# 4
# 5
# 6
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
975
975
975
975
1,050
1,050
1,050
1,050
( 60 )
( 4.3 )
( 4.3 )
( 4.3 )
( 4.3 )
( 4.7 )
( 4.7 )
( 4.7 )
( 4.7 )
4-1 / 2
1,845
1,845
1,845
1,845
3,135
3,370
3,565
3,730
( 114 )
( 8.2 )
( 8.2 )
( 8.2 )
( 8.2 )
( 13.9 )
( 15.0 )
( 15.9 )
( 16.6 )
6-3 / 4
2,765
2,765
2,765
2,765
3,135
3,370
3,565
3,730
( 171 )
( 12.3 )
( 12.3 )
( 12.3 )
( 12.3 )
( 13.9 )
( 15.0 )
( 15.9 )
( 16.6 )
7-1 / 2
3,075
3,075
3,075
3,075
3,135
3,370
3,565
3,730
( 191 )
( 13.7 )
( 13.7 )
( 13.7 )
( 13.7 )
( 13.9 )
( 15.0 )
( 15.9 )
( 16.6 )
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
3,640
3,915
4,140
4,305
( 114 )
( 7.5 )
( 7.5 )
( 7.5 )
( 7.5 )
( 16.2 )
( 17.4 )
( 18.4 )
( 19.1 )
6-3 / 4
2,535
2,535
2,535
2,535
3,640
3,915
4,140
4,330
( 171 )
( 11.3 )
( 11.3 )
( 11.3 )
( 11.3 )
( 16.2 )
( 17.4 )
( 18.4 )
( 19.3 )
10
3,760
3,760
3,760
3,760
3,640
3,915
4,140
4,330
( 254 )
( 16.7 )
( 16.7 )
( 16.7 )
( 16.7 )
( 16.2 )
( 17.4 )
( 18.4 )
( 19.3 )
3-1 / 8
1,570
1,570
1,570
1,570
3,995
3,995
3,995
3,995
( 79 )
( 7.0 )
( 7.0 )
( 7.0 )
( 7.0 )
( 17.8 )
( 17.8 )
( 17.8 )
( 17.8 )
4-1 / 2
2,260
2,260
2,260
2,260
4,065
4,365
4,615
4,830
( 114 )
( 10.1 )
( 10.1 )
( 10.1 )
( 10.1 )
( 18.1 )
( 19.4 )
( 20.5 )
( 21.5 )
6-3 / 4
3,390
3,390
3,390
3,390
4,065
4,365
4,615
4,830
( 171 )
( 15.1 )
( 15.1 )
( 15.1 )
( 15.1 )
( 18.1 )
( 19.4 )
( 20.5 )
( 21.5 )
10
5,020
5,020
5,020
5,020
4,065
4,365
4,615
4,830
( 254 )
( 22.3 )
( 22.3 )
( 22.3 )
( 22.3 )
( 18.1 )
( 19.4 )
( 20.5 )
( 21.5 )
3-1 / 2
1,815
1,815
1,815
1,815
4,435
4,620
4,620
4,620
( 89 )
( 8.1 )
( 8.1 )
( 8.1 )
( 8.1 )
( 19.7 )
( 20.6 )
( 20.6 )
( 20.6 )
4-1 / 2
2,335
2,335
2,335
2,335
4,435
4,765
5,040
5,275
( 114 )
( 10.4 )
( 10.4 )
( 10.4 )
( 10.4 )
( 19.7 )
( 21.2 )
( 22.4 )
( 23.5 )
6-3 / 4
3,500
3,500
3,500
3,500
4,435
4,765
5,040
5,275
( 171 )
( 15.6 )
( 15.6 )
( 15.6 )
( 15.6 )
( 19.7 )
( 21.2 )
( 22.4 )
( 23.5 )
10
5,185
5,185
5,185
5,185
4,435
4,765
5,040
5,275
( 254 )
( 23.1 )
( 23.1 )
( 23.1 )
( 23.1 )
( 19.7 )
( 21.2 )
( 22.4 )
( 23.5 )
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 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 and # 4 rebar - α sat
= 1.00 # 5 and # 6 rebar - 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 .
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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