Adhesive Anchoring Systems
3.2.6 HIT-HY 70 Hybrid for Masonry Construction
216 Hilti, Inc. (US) 1-800-879-8000 | www.us.hilti.com I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I www.hilti.ca I Anchor Fastening Technical Guide 2016
3.2.6.3 Technical Data
Table 2 - HIT-HY 70 allowable adhesive bond tension loads for threaded rods and reinforcing bars in the face
of grout-filled concrete masonry walls
1, 2, 3, 4, 5, 6, 7, 8
Nominal
anchor
diameter
Rebar
size
Effective
embedment
in. (mm)
11
Tension
cr
lb (kN)
Spacing
9
Edge distance
10
Critical
s
cr
in. (mm)
Minimum
s
min
in. (mm)
Load
reduction
factor @ s
min
6
Critical
c
cr
in. (mm)
Minimum
c
min
in. (mm)
Load
reduction
factor @
c
min
12
3/8
3
3-3/8
(86)
1,240
(5.5)
13.5
(342.9)
4
(102)
0.70
12
(304.8)
4
(102)
0.80
1/2
4
4-1/2
(115)
2,035
(9.0)
18
(457.2)
0.70
20
(508)
0.76
5/8
5
5-5/8
(143)
2,840
(12.6)
22.5
(571.5)
0.50
20
(508)
0.71
3/4
6
6-3/4
(172)
3,810
(16.9)
27
(685.8)
0.50
20
(508)
0.66
Table 3 - HIT-HY 70 allowable adhesive bond shear loads for threaded rods and reinforcing bars in the face
of grout-filled concrete masonry walls
1, 2, 3, 4, 5, 6, 7, 8
Nominal
anchor
diameter
Rebar
size
Effective
embedment
in. (mm)
11
Shear
lb (kN)
Spacing
9
Edge distance
10
Critical
s
cr
in. (mm)
Minimum
s
min
in. (mm)
Load
reduction
factor @
s
min
6
Critical
c
cr
in. (mm)
Minimum
c
min
in. (mm)
Load reduction factor
@ c
min
12
Load
perpendicular
to edge
Load
parallel
to edge
3/8
3
3-3/8
(86)
850
(3.8)
13.5
(342.9)
4
(102)
1.00
12
(304.8)
4
(102)
0.88
1.00
1/2
4
4-1/2
(115)
1,495
(6.7)
18
(457.2)
1.00
12
(304.8)
0.49
1.00
5/8
5
5-5/8
(143)
2,615
(11.6)
22.5
(571.5)
0.50
20
(508)
0.40
0.78
3/4
6
6-3/4
(172)
4,090
(18.2)
27
(685.8)
0.50
20
(508)
0.26
0.60
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 Anchors may be installed in any location in the face of the masonry wall including cell, web, and mortar joints. Anchors are limited to one per masonry cell.
3
Linear interpolation of load values between minimum spacing (s
min
) and critical spacing (s
cr
) and between minimum edge distance (c
min
) and critical edge distance (c
cr
)
is permitted.
4 Concrete masonry thickness must be equal to or greater than 1.5 times the anchor embedment depth. EXCEPTION: the 5/8-inch- and the 3/4-inch diameter anchors
(No. 5 and No. 6 bars) may be installed in minimum nominally 8-inch thick concrete masonry.
5 When using the basic load combinations in accordance with IBC Section 1605.3.1, tabulated allowable loads must not be increased for seismic or wind loading.
When using the alternative basic load combinations in IBC Section 1605.3.2 that include seismic or wind loads, tabulated allowable loads may be increased by 33-1/3
percent, or the alternative basic load combinations may be reduced by a factor of 0.75.
6 Allowable loads must be the lesser of the adjusted masonry or bond tabulated values and the steel values given in table 4.
7 Tabulated allowable loads shall be adjusted for increased base material temperatures in accordance with figure 12.
8 For combined loading: (T
applied
/ T
allowable
)
n
+ (V
applied
/ V
allowable
)
n
≤ 1
where n=5/3 for 3/8- and 1/2-inch diameters (No. 3 and No. 4 rebar) and n=1 for 5/8- and 3/4-inch diameters (No. 5 and No. 6 rebar).
9 The critical spacing, s
cr
, is the anchor spacing where full load values may be used. The minimum spacing, s
min
, is the minimum anchor spacing for which values are
available and installation is recommended. Spacing is measured from the center of one anchor to the center of an adjacent anchor.
10 The critical edge distance, c
cr
, is the edge distance where full load values may be used. The minimum edge distance, c
min
, is the minimum edge distance for which
values are available and installation is recommended. Edge distance is measured from the center of the anchor to the closest edge.
11 Embedment depth is measured from the outside face of the concrete masonry unit.
12 Load reduction factors are multiplicative, both spacing and edge distance load reduction factors 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).