DESIGN DATA IN GROUT-FILLED CMU
The following design information is the allowable load tables for use in grout-filled CMU block walls that are based on the published loads in IAPMO Evaluation Report ER 677 . This data is applicable for both the US and Canada .
Table 22 — Allowable tensile loads for Hilti KB1 in the face of grout-filled concrete masonry unit ( CMU ) walls 1 , 3 , 4 , 5 , 6
Nominal anchor diameter
Nominal embedment
Allowable tension capacity at
s cr and c cr
Critical spacing ,
s cr
Spacing
Minimum spacing ,
s min
2
Load reduction factor at
s min
Critical edge distance ,
c cr
Edge Distance
Minimum edge distance ,
c min
in . in . ( mm ) lb ( kN ) in ( mm ) in ( mm ) in ( mm ) in ( mm ) 3 / 8 2-3 / 8 ( 60 ) 350 ( 1.6 ) 8 ( 203 ) 3 ( 76 ) 0.56
1 / 2
5 / 8
3 / 4
Load reduction factor at
c min
2-3 / 8 ( 60 ) 615 ( 2.7 ) 8 ( 203 ) 0.54 0.88
4 ( 102 ) 3-5 / 8 ( 92 ) 1,055 ( 4.7 ) 13 ( 330 ) 0.48 0.94
3-1 / 4 ( 83 ) 965 ( 4.3 ) 11 ( 279 ) 0.62 12 ( 305 ) 4 ( 102 ) 0.86
5 ( 127 ) 4-1 / 2 ( 114 ) 1,140 ( 5.1 ) 16 ( 406 ) 0.76 1.00
4 ( 102 ) 1,085 ( 4.8 ) 13 ( 330 ) 0.55 0.84
6 ( 152 ) 5-1 / 2 ( 140 ) 1,130 ( 5.0 ) 19 ( 483 ) 0.69 0.75
Table 23 — Allowable shear loads for Hilti KB1 in the face of grout-filled concrete masonry unit ( CMU ) walls 1 , 3 , 4 , 5 , 6
Nominal anchor diameter
Nominal embedment
Allowable shear capacity at
s cr and c cr
Critical spacing ,
s cr
Spacing
Minimum spacing ,
s min
2
Load reduction factor at
s min
Critical edge distance ,
c cr
Minimum edge distance ,
c min
in . in . ( mm ) lb ( kN ) in ( mm ) in ( mm ) in ( mm ) in ( mm ) 3 / 8 2-3 / 8 ( 60 ) 575 ( 2.6 ) 8 ( 203 ) 3 ( 76 )
1 / 2
5 / 8
3 / 4
2-3 / 8 ( 60 ) 3-5 / 8 ( 92 ) 3-1 / 4 ( 83 ) 4-1 / 2 ( 114 )
4 ( 102 ) 5-1 / 2 ( 140 )
0.87
Edge Distance
Perpendicular load reduction factor at
c min
Parallel load reduction factor at
c min
0.94 0.94 960 ( 4.3 ) 8 ( 203 ) 4 ( 102 ) 0.72 1.00
0.84 12 ( 305 ) 4 ( 102 ) 1,370 ( 6.1 ) 11 ( 279 ) 5 ( 127 ) 0.64 0.83
1,370 ( 6.1 ) 13 ( 330 ) 6 ( 152 ) 0.64 0.83
1 Values valid for anchors installed in face shells of Type 1 , Grade N , lightweight , medium-weight , or normal-weight concrete masonry units conforming to ASTM C90 . The masonry units must be fully grouted with coarse grout conforming to the 2018 and 2015 IBC Section 2103.3 , or 2012 IBC Section 2103.13 . Mortar must comply with 2018 and 2015 IBC Section 2103.2 , or 2012 IBC Section 2103.9 . Masonry compressive strength must be at least 1,500 psi at the time of anchor installation .
2 Loads tabulated are applicable to anchors spaced a critical distance of 4 times the embedment depth . The anchors may be placed at a minimum spacing , s min , provided that reductions are applied to the tabulated values . 3 Anchors must be installed a minimum of 1-3 / 8 inches from any vertical mortar joint ( head joint ) in accordance with Figure 5 . 4 Embedment depth must be measured from the outside face of the concrete masonry unit . 5 For intermediate edge distances and spacings , allowable loads may be determined by linearly interpolating between the allowable loads at the two tabulated edge distances . 6 The tabulated allowable loads have calculated based on a safety factor of 5.0
Figure 5 — Acceptable locations ( shaded areas ) for Hilti KB1 anchors in the face of grout-filled concrete masonry unit ( CMU ) walls
4 " minimum edge distance |
12 " critical edge distance |
No installation within |
|
|
1-3 / 8 " of head joint |
4 " minimum edge distance
12 " critical edge distance
Mortar Joint
Anchor installation is restricted to shaded areas
Installations in this area for full allowable load capacity
Concrete Masonry Unit ( Grouted )
Installation in this area for reduced allowable load capacity
390 Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.9 KB1 EXPANSION ANCHOR 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