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
Inside corners where two anchor channels are present and are
loaded simultaneously are outside the scope of AC232. Most of
the AC232 provisions can be applied to this type of application.
However, the influence of the adjacent anchor channel should
be considered, as the concrete strength may be negatively
impacted.
Figure 9.3.3.7 — HAC CRFOS U — Anchor channels on both sides — Obtuse
angle Corner —Section View.
Perpendicular Shear: This condition can be analyzed by
fictitious edge between c a2,b + c cr,V assigning side edge concrete
between channel a and b. The total distance of (a+b) can be
divided between the two channels, while analyzing the individual
channels. For example if channel a is loaded more than channel
b than side edge distance of 3/4(a+b) can be assumed for
channel a and side edge distance 1/4(a+b) can be assumed for
channel b. Refer Figure 9.3.4.1.
Tension: The tension analysis will follow the section 9.3.1
without having any reduction in anchorage tension pullout
capacity ΦN pn because of the influence of the other anchor
channel.
Figure 9.3.3.6 — HAC CRFOS U — Anchor channels on both sides - O btuse
angle Corner — Plan View.
Please refer section 9.2.3 for detail method of analyzing
perpendicular and longitudinal shear for a face of slab obtuse
degree angle corner with anchor channels on both sides. The
section 9.2.3 describes method that includes the influence of
the anchor channel on the other side of the corner.
Tension: The tension analysis will follow the section 9.3.1 no
reduction in anchorage tension pullout capacity ΦN pn because
of the influence of the other anchor channel. The cb concrete
cover is taken as minimum of the four s/2, c b1 , c b2 and c b3
dimensions.(s=spacing between rebars) Refer Figure 9.3.3.6 and
Figure 9.3.3.7.
If the obtuse angle corner does not work by modeling it as a 90
degree corner, contact Hilti for further assistance in optimizing
the solution.
Shear: Obtuse angle corners with HAC CRFOS U channels:
The side edge distance used in the analysis should be as
shown in the Figure 9.3.3.6. Analysis is done using the design
methodology of 90 degree corners. Conservatively, the concrete
breakout strength in shear is reduced by 20% similar to 90
degree corners. Please refer the section for 90 degree corner.
However, in reality corner reduction factor should be less 20%
because of the availability of more concrete compared to 90
degree corners.
Figure 9.3.4.1 — HAC CRFOS U — Inside Corner.
280
9.3.4 — H
AC CRFOS U DESIGN: FACE OF SLAB INSIDE CORNER WITH
PAIR OF ANCHOR CHANNEL
Obtuse Angle Corner
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
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