HAC_Technical-Guide

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Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
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
9.1 Overview of Hilti Anchor Channel Systems Design
9.2 HAC and HAC-T Design 9.3 HAC CRFoS U Design 9.4 & 9.5 Post Tensioned Slabs 9.6 HAC EDGE Design
9.2.6 — HAC AND HAC-T DESIGN: EXAMPLE OF DESIGN OF FACE OF
SLAB OUTSIDE CORNER WHERE THE ANCHOR CHANNELS
ARE LOCATED AT A CERTAIN DISTANCE
Quick conservative check can be done by using the method
described in this section. For concrete breakout, in tension and
concrete breakout, and pryout in shear, the imaginary concrete
side edge of "(x/2)-1” is considered. This is done in order to take
into account the overlapping of the failure planes.
The example is modeled as shown in the Figure 9.2.6.1
and Figure 9.2.6.2. Having the true edge distance yields
unconservative results.
Alternatively the detailed method described section 9.2.3 can be
applied in analyzing the anchor channels.
Figure 9.2.6.1 — Example of design of FOS outside corner.
Figure 9.2.6.2 — E xample of use of HAC-40 91/300 F on a curb installing the
anchor channel Face of curb.
9.2.7 — HAC AND HAC-T DESIGN: TOP OR BOTTOM OF SLAB OUTSIDE
CORNER SINGLE ANCHOR CHANNEL
90° corners
Outside corners where only one anchor channel is present are
fully covered by
ESR-3520. The design methodology is fully in accordance with
the anchor channel Design Code presented in Chapter 7.
AC232 includes design provisions to account for the influence
of a corner. The concrete strengths in tension and shear of the
anchor channel may be reduced (depending on how far the
anchor channel is away from the corner) since the concrete
cones may not be fully developed. See chapter 7 for design
provisions for corners. In PROFIS Anchor Channel, these
conditions can be simply modeled by reducing the corner
distance.
Acute and obtuse corners
Although AC232 does not specifically address acute and obtuse
corners, by not following the idealized failure planes but the path
of least resistance, AC232 provisions can be used to analyze
this type of corners.
In order to avoid calculating unconservative concrete strength,
the path of least resistance for the crack should be always
considered.
Obtuse corners
Perpendicular Shear: The line is drawn originating from the
corner of the obtuse corner. The C
a2
is measured from the corner
to the anchor. Not using the darkened shaded region of concrete
in analysis as illustrated in Figure 9.2.7.2. This is done to make
sure the concrete edge of C
a1
width is available through out for
C
a2
side edge.
Tension: Similar to the perpendicular shear in tension analysis
the line is drawn originating from the corner of the obtuse angle
corner case with one channel. The C
a2
is measured from the
anchor a
3
to the line. The darkened shaded region of concrete is
not used in analysis as illustrated in Figure 9.2.7.3.
Longitudinal Shear: Similar to the perpendicular shear again in
longitudinal analysis the line is drawn originating from the corner
of the obtuse corner. The C
a1
is measured from the corner to the
anchor. The darkened shaded region of concrete is not used in
analysis as illustrated in Figure 9.2.7.4. This is done to make sure
the concrete edge of C
a2
width is available through out for C
a1
.
Figure 9.2.7.1 — TOS or BOS single channel at certain distance.
Figure 9.2.7.2 — Obtuse angle corner — TOS or BOS single channel at
certain distance — Perpendicular Shear.
Figure 9.2.7.3 — Obtuse angle corner — TOS or BOS single channel at
certain distance — Tension.
Figure 9.2.7.4 — Obtuse angle corner — TOS or BOS single channel at
certain distance — Longitudinal Shear.