Anchor Fastening Technical Guide , Edition 22
Table 6 — Hilti HIT-HY 270 allowable adhesive bond loads for threaded rods and reinforcing bars in the top of grout-filled concrete masonry walls 1 , 2 , 4 , 5 , 6 , 7 , 8
Spacing Tension load 9 Shear load 9
Nominal anchor diameter or rebar size
Effective embedment in . ( mm )
1 / 2 3 4-1 / 2 ( 114 )
5 / 8 3 5-5 / 8 ( 143 )
Edge distance in . ( mm )
End distance in . ( mm )
Critical
s cr in . ( mm )
Minimum
s min in . ( mm )
@ s cr lb ( kN )
Reduction factor @
s min
Parallel to edge of masonry wall @ s cr lb ( kN )
Perpendicular to edge of masonry wall @ s cr lb ( kN )
1-3 / 4 1,165
815 345
0.57 ( 44 ) ( 5.2 ) ( 3.6 ) ( 1.5 )
4 1,625 1,445 505
0.50 ( 102 ) ( 7.2 ) ( 6.4 ) ( 2.2 )
1-3 / 4 16 3 1,165 1,190 385
0.58 ( 44 ) ( 406 ) ( 76 ) ( 5.2 ) ( 5.3 ) ( 1.7 )
4 8 1,590
1,825 655 0.50
( 102 ) ( 203 )
( 7.1 ) ( 8.1 ) ( 2.9 ) 6-3 / 4 2-3 / 4 1,020
1,405 425
3 / 4 3 0.74 ( 171 ) ( 70 ) ( 4.5 ) ( 6.3 ) ( 1.9 )
# 4 10
|
4-1 / 2 |
865 |
635 |
245 |
|
( 114 )
5-5 / 8
|
1-3 / 4
( 44 )
|
16
( 406 )
|
16
( 406 )
|
( 3.8 )
980
|
1.00 |
( 2.8 )
755
|
( 1.1 )
295
|
# 5 10
|
|
|
|
|
|
( 143 ) |
( 4.4 ) |
( 3.4 ) |
( 1.3 ) |
Reduction Factor @ s min
1 All values are for anchors installed in fully grouted concrete masonry with minimum masonry prism strength of 1,500 psi . Concrete masonry units shall be lightweight , medium-weight or heavy-weight conforming to ASTM C90 . Allowable loads are calculated using a safety factor of 5 .
2 When using the basic load combinations in accordance with IBC Section 1605.3.1 , or the alternative basic load combinations in IBC Section 1605.3.2 , tabulated allowable loads must not be increased for seismic or wind loading .
3 One anchor shall be permitted to be installed in each cell . 4 Anchors are not permitted to be installed in a head joint , flange or web of the concrete masonry unit . 5 Allowable loads must be the lesser of the adjusted bond tabulated values and the steel values given in tables 3 and 4 . 6 Tabulated allowable loads shall be adjusted for increased base material temperatures in accordance with figure 13 . 7 For combined loading : ( T applied
/ T allowable ) n + ( V applied
/ V allowable
) n ≤ 1 where n = 5 / 3 for 1 / 2-inch diameters (# 4 rebar ) and n = 1 for 5 / 8-inch diameters (# 5 rebar ). 8 The tabulated edge distance is measured from the anchor centerline to the edge of the concrete block . See figure 3 . 9 Linear interpolation of load values between the two tabulated edge distances is permitted . 10 One anchor shall be permitted to be installed in each concrete block .
0.50
0.50
0.50
0.50
0.59
1.00
3.2.4
Figure 3 — Edge and end distances for threaded rods and reinforcing bars installed in the top of grout-filled CMU
Edge Distance
Threaded Rod or Reinforcing Bar
End Distance
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.4 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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