1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material
6. Loading
Introduction
AC232 brought major benefits to the design community. One of the major benefits is that it removed the limitations bounded
by relaying on test data only. AC232 provides design guidelines for anchor channels. Having model code compliant design
provisions ensures the levels of reliability of the system are met. Safety factors are generally not established via manufacturers but
manufacturers follow the IBC.
8. Reinforcing
Bar Anchorage
9. Special Anchor
Channel Design
10. Design
Software
For applications where the substrate is thin (thinner at pocket
zones) and lightweight concrete is used, an anchor channel
with rebars (HAC CRFoS U or HAC EDGE) is typically required
even at the typical intermediate conditions. For these type
of projects, one anchor channel type suitable for the typical
intermediate and corner zones simplifies the installation of the
anchor channels on the jobsite. The Hilti Anchor Channel Systems have been engineered
keeping ease of installation at its root. It offers a gradual
increase in performance while maintaining one t-bolt type
compatible with all HAC-40 to HAC-70 channel profiles.
HAC CRFoS U which are commonly used at corner zones in
face of slab applications can also be used at the corners. This is
one less channel type to worry about.
HAC EDGE comes with the right edge distance simplifying
even further its installation while minimizing the probability of
installing the product at the right edge distance.
Some layouts cannot be idealized and there are always
conditions that may require unique-custom solutions. This
section provides different layout and the fundamentals can be
applied to your unique project.
The added benefit of HAC CRFoS U is that it can be used at
intermediate applications and corners. Therefore, the anchor
channel selection can be reduced to two different anchor
channels.
14. Design
Example
Figure 11.4.1.3 Typical anchor channel layout for composite slabs
Non-traditional wind pressure distribution:
In some cases, the wind pressures acting at the façade may not
allow for an optimum layout. These critically loaded conditions
typically occur in less than 5% of the applications. Although
introducing additional anchor channel will require additional
coordination, these critically loaded areas may require
customized solutions that using them throughout the entire strip
will considerably increase the cost of the anchor channel.
Figure 12.4.1.2 Optimum anchor channel layout
Figure 11.4.1.4 Anchor channel layout for conditions with extreme wind
pressures
Figure 12.4.1.1 Optimum anchor channel layout
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The most cost effective practical layout is having one anchor
channel type covering all typical intermediate applications and
one anchor channel type covering the corner zones. A third
anchor channel type is typically introduced at corner conditions.
In an ideal world, this is the perfect layout.
13. Field Fixes
Bring it all together:
11.4.1 ANCHOR CHANNEL LAYOUTS
Ideal layout for face of slab applications:
12. Instructions
for Use
Composite slabs with lightweight concrete:
The publication of AC232 allows to account for design provisions that were neglected in the past. Design considerations such as 5
percent fractile, cracked concrete, seismic detailing are common examples. As the industry continues to evolve, s.
Ideal layout:
11. Best
Practices
11.4 CAST-IN ANCHOR CHANNEL LAYOUT
7. Anchor Channel
Design Code
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
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