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
BOS and TOS channels: BOS under from TOS
TOS and BOS: In the case shown in figure 9.2.14.8 the two
anchor channels are drifted apart so much so that the failure
planes in tension do not intersect. The idealized failure plane is
represented by brown line while the red line represents the path
of least resistance. For the concrete failure modes in tension,
the stresses in the concrete induced by the two anchors of
the anchor channels closer to each other change the concrete
behavior. The concrete crack does not follow the idealized
failure plane (C cr,N ) but the path of least resistance. This concept
is illustrated in Figure 9.2.14.8 and Figure 9.2.14.9. TOS and BOS: This section describes the conditions where two anchor channels are placed one on top of the other, facilitating the
connection above and below the slab. For analyzing these condition it is recommended to assign half of the concrete height to the
TOS channel and half to the BOS channel.
The location of the imaginary line can be optimized. More concrete in height can be assigned to the channel subjected to more
shear force.
Figure 9.2.14.9 — Parallel Channels Top and Bottom-BOS away from TOS:
Tension — TOS and BOS Plan View.
The front edge concrete for the BOS anchor channel is as taken
as 0.5x in the analysis. The ToS channel is modeled as having
a back edge of 0.5x. The distance x is defined as the shortest
straight line connecting one anchor stud to another as shown in
the Figure 9.2.14.8 and Figure 9.2.14.9.
In Figure 9.2.14.11 the failure planes are drawn in tension and in Figure 9.2.14.12: failure planes are drawn for perpendicular shear.
An imaginary line is drawn at the intersection of these failure planes limiting the height of the slab to h/2 for each anchor channel
analysis.
Please note that the location of the imaginary line in between
channel a and b can be optimized in accordance to the amount
of tension experienced by each channel as needed.
Longitudinal shear
TOS and BOS anchor channels
Figure 9.2.14.10-a — Longitudinal Shear — Plan view-Top anchor channel.
Figure 9.2.14.12 — Top and Bottom Channel: TOS under BOS -Perpendicular
Shear — Section View.
Figure 9.2.14.11 — Top and Bottom Channel: TOS under BOS -Tension —
Section View.
Figure 9.2.14.10-b add the figure name.
Figure 9.2.14.8 — Parallel Channels Top and Bottom-BOS away from TOS:
Tension- TOS and BOS Section View.
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The longitudinal shear force V uax,a and V uax,b is applied at the
center line of the anchor channel, as shown in Figure 9.2.14.10-a
and Figure 9.2.14.10-b. Having infinite sides edges on both sides
will create breakout planes perpendicular to the edge as seen
in the Figure 9.2.14.10-a and Figure 9.2.14.10-b. For analyzing
anchor channel "a" the front edge of c a1,a is considered
subjecting it to shear force of V ua,xa . For analyzing anchor
channel "b" the edge of c a1,b is used against the total shear force
(V T = V uax,a +V uax,b ) following the ACI 318-14 provision as shown in
Figure 9.2.14.10-b.
Tension
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
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