Anchor Fastening Technical Guide , Edition 22
Hilti installation specifications for rebar in multi-wythe brick wall
Setting information
Symbol Units
Nominal rod diameter ( in .) # 4 # 5 # 6
Nominal bit diameter d o in . 1 1 1 Screen size HIT-SC - 26x200 26x200 26x200
Nominal embedment h o in . 8-1 / 4 8-1 / 4 8-1 / 4 ( mm ) ( 210 ) ( 210 ) ( 210 )
Effective embedment h ef in . 8 8 8 ( mm ) ( 203 ) ( 203 ) ( 203 )
3.2.4
Figure 9 — Hilti HIT-HY 270 specifications for rebar in multi-wythe brick wall
Table 15 — Hilti HIT-HY 270 allowable adhesive bond loads for threaded rods in multi-wythe solid brick wall 1 , 2 , 3 , 4 , 5 , 6 , 8 , 9
Nominal anchor diameter in .
3 / 8
1 / 2
5 / 8
3 / 4
Effective embedment 7 in . ( mm )
Tension lb ( kN )
Shear lb ( kN )
6 ( 152 ) 895 ( 4.0 ) 680 ( 3.0 ) 10 ( 254 ) 1,325 ( 5.9 ) 795 ( 3.5 ) 6 ( 152 ) 895 ( 4.0 ) 1,075 ( 4.8 ) 10 ( 254 ) 1,455 ( 6.5 ) 1,115 ( 5.0 ) 6 ( 152 ) 1,025 ( 4.6 ) 1,405 ( 6.3 ) 10 ( 254 ) 1,955 ( 8.7 ) 1,445 ( 6.4 ) 8 ( 203 ) 1,575 ( 7.0 ) 1,985 ( 8.8 ) 13 ( 330 ) 2,135 ( 9.5 ) 1,985 ( 8.8 )
Critical
s cr in . ( mm )
Spacing Minimum
s min in . ( mm )
Load reduction factor @ s min
Critical
c cr in . ( mm )
Edge distance Minimum
c min in . ( mm )
Load reduction factor @ c min
16 ( 406 ) 8 ( 203 ) 0.50 16 ( 406 ) 8 ( 203 ) 0.50
1 All values are based on mortar shear strength of 45 psi or greater . Allowable loads are calculated using a safety factor of 5 . 2 Anchors must be installed in the face of the multi-wythe URM wall . The wall must have a minimum thickness of 13 inches made up of 3 wythes of brick . 3 Tabulated values are for maximum one anchor installed in the center of the brick of the multi-wythe URM wall . 4 Edge distance , c min
, and spacing , s min
, are the minimum distances for which values are available and installation is recommended . Edge distance is measured from the center of the anchor to each edge . Spacing is measured from the center of one anchor to the center of an adjacent anchor .
5 Allowable loads must be the lesser of the adjusted bond tabulated values and the steel values given in table 3 . 6 Allowable loads shall be adjusted for increased base material temperature in accordance with Figure 13 . 7 Tabulated embedment depth is limited by the length of the plastic HIT-SC screens . 8 For combined loading : ( T applied
/ T allowable ) + ( V applied
/ V allowable
) ≤ 1 9 Load reduction factors are multiplicative : both spacing and edge distance load reduction factors , and spacing and edge distances for all adjacent anchors / edges less than s cr
/ c cr , must be considered . Load values for anchors installed at less than s cr and c cr must be multiplied by the appropriate load reduction factor based on actual edge distance ( c ) and spacing ( s ).
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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