HAC_Technical-Guide

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Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
2.1 HAC
Nomenclature
2.2 Geometric Parameters 2.3 Structural Performance
2.4 Ordering
Information
2.5 Standard
Portfolio
2.6 HAC Custom
Solutions
HAC
HAC
CRFoS U
HAC EDGE HBC-C
HAC-T
HAC-30
HAC-T
EDGE
HBC-T
HBC-B
HAC
HAC
CRFoS U
HAC EDGE HBC-C
HAC-T
HAC-30
HAC-T
EDGE
HBC-T
HBC-B
1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material 6. Loading
7. Anchor Channel
Design Code
8. Reinforcing
Bar Anchorage
9. Special Anchor
Channel Design
10. Design
Software
11. Best
Practices
12. Instructions
for Use
13. Field Fixes
14. Design
Example
Minimum substrate requirements for
HAC CRFoS U
Similarly to HAC, the minimum edge distances for HAC
CRFoS U are established via testing. Although HAC CRFoS U
are not implicitly covered by AC232, ESR-3520 provides the
minimum edge and corner distance for the minimum member
thickness. The minimum member thickness for HAC CRFoS U is
larger than the minimum member thickness for HAC. However,
the channel profile is the same for HAC and HAC CRFoS U.
Therefore, it is conservative to use the minimum HAC edge and
corner distances for HAC CRFoS U.
Table 2.2.4.2 — Minimum edge and corner distances for
HAC CRFoS U in normal weight and sand-
lightweight concrete
Anchor
channel
Units C
a1
C
a2
*h
min
HAC-50
CRFoS U
in 1.97 1.97 14.00
(mm) (50) (50) (356)
HAC-60
CRFoS U
in 2.95 2.95 14.25
(mm) (75) (75) (362)
HAC-70
CRFoS U
in 2.95 2.95 14.25
(mm) (75) (75) (362)
Table 2.2.5.2 — Minimum edge and corner distances for
HAC CRFoS U in all-lightweight concrete
Anchor
channel
Units C
a1
C
a2
*h
min
HAC-50
CRFoS U
in 2.95 2.95 14.00
(mm) (75) (75) (356)
HAC-60
CRFoS U
in 2.95 2.95 14.25
(mm) (75) (75) (362)
HAC-70
CRFoS U
in 2.95 2.95 14.25
(mm) (75) (75) (362)
*Minimum slab thickness, hmin may be reduced.
c
a1
= min of c
a1,1
and c
a1,2
c
a2
= min of c
a2,1
and c
a2,2
Corner and edge distances are measured to the center of the anchor.
Figure 2.2.4.4 — Minimum HAC CRFoS U edge and corner distances,
elevation view.
Figure 2.2.4.5 — Minimum HAC CRFoS U member thickness, isometric
view.
Minimum edge distance for anchor channels
in composite slabs
The minimum edge and corner distances for HAC CRFoS U are
consistent with the minimum requirements of its matching HAC
profile size. Moreover, the AC232 test series 6 - splitting failure
due to installation requires a 1/8 inch (3 mm) gap between channel
lip and fixture to ensure introduction of a tension load into the
anchor during torquing. This takes into considerations unfavorable
anchor channel installation. However, this can be prevented in
composite slabs where the anchor channel profile bears on the
pour stop and the channel lips and fixture are flush with the pour
stop.
For composite slabs where the anchor channel is fixed to
the pour stop and the channel cannot be recessed in the
slab, smaller edge distances may be allowed. Additional
measurement may be required if the rebar is embedded in the
metal deck zone. See section 9 for additional information.
Figure 2.2.4.6 — HAC CRFoS U in composite slab.
Table 2.2.4.4 — Minimum distance from face of slab to metal deck, h
min,CP
Anchor
channel
Units *h
min,CP
HAC-50
CRFoS U
in 4.92
(mm) (125)
HAC-60
CRFoS U
in 6.61
(mm) (168)
HAC-70
CRFoS U
in 7.72
(mm) (196)
* min. distance where no concrete edge breakout in shear capacity is reduced h
min,CP
, contact
Hilti.
HAC CRFoS U are ideal for face of slab corner applications.
The Hilti face of slab corner solution utilizes two independent
anchor channels. The use of two independent anchor channels
eases the installation in congested conditions. This minimizes
clashes of the anchors with the rebar cage, preventing damage
of the anchors during installation. Moreover, two independent
anchor channels allows de-coupling of the loads applied on
each corner channel, preventing the anchors from experiencing
undesired loads.
The use of anchor channels with rebar anchors (HAC CRFoS
U) allows the anchor channels to be installed as close as 2-1/8”
(from end of channel profile) away from the corner, without
penalizing the concrete tensile strengths in tension, as is the
case for HAC.
HAC CRFoS U comes with specially bent rebars. Thus, allowing
both corner channels to be installed at the same elevation
without clashing of the rebars of both corner channels.
Due to the HAC CRFoS U configuration, the anchor channel
used at both corners is the same type. At corners, one HAC
CRFoS U is rotated 180 degrees. Therefore, one channel has
the bent rebars going up while the other are going down.
Anchor channel steel strengths are provided in sections 2.3.3
and 2.3.4. For design of channels at corners, refer to chapter 9.
Figure 2.2.5.1 — HAC CRFoS U at corners.
Corner distance c
ca2
is measured to the center of the anchor.
Figure 2.2.5.2 — Minimum corner distance for pair of HAC CRFoS U in a
corner.
Table 2.2.5.3 — Minimum substrate edge and corner
distances for pair of HAC CRFoS U
in corners in normal weight, sand-
lightweight and all light-weight concrete
Anchor channel Units Minimum c
a1
Minimum c
ca2
HAC-50 CRFoS U
in *1.97 3.15
(mm) (50) (80)
HAC-60 CRFoS U
in 2.95 3.62
(mm) (75) (92)
HAC-70 CRFoS U
in 2.95 3.94
(mm) (75) (100)
*For all-lightweight concrete, c
a1
= 2.95” (75 mm)
Corner distance c
ca2
is measured to the center of the anchor.
Figure 2.2.5.3 — Minimum corner distance for pair of HAC CRFoS U in a
corner, plan view.
What drives the minimum corner distance?
The minimum corner distance (C
ca,2
) is based on the minimum
physical distance required to avoid clashing of the rebars of the
two corner anchor channels, installed at the same elevation.
HAC CRFoS U at non-90° corners
HAC CRFoS U are suitable for non-90° corners. The use of
two independent anchor channels simplifies the portfolio by
no requiring custom made channels. See chapter 9 for design
information.
Figure 2.2.5.4 — Pair of HAC CRFoS U in an acute corner, plan view.
2.2.5 HAC CRFoS U IN FACE OF SLAB CORNERS