1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material
6. Loading
Example
Conclusion:
Anchor channel: HAC-50 106/300 F
Utilization: 107%
Bolt spacing: 5.00”
Anchor channel Price Index: 0.24 Solution option 2 provides a price
differential index of 0.175 (0.51-0.335).
This is roughly 73% on HAC savings
by just increasing the t-bolt spacing by
2.125"!
Connection anchor-channel, ΦN sc
Anchor channel: HAC-50 356/300 F CRFoS U
UUtilization: 64%
Bolt spacing: 5”
Anchor channel Price index: 0.51
12. Instructions
for Use
13. Field Fixes
14. Design
Example
Channel lip, ΦN sl
WORK-AROUND: INCREASE T-BOLT SPACING
OR REDUCE ANCHOR SPACING WORK-AROUND: ADD A T-BOLT, ADD AN
ANCHOR OR INCREASE T-BOLT SPACING
Flexure of the anchor channel is another failure mode where
the resistance is derived via testing and cannot be increased.
However, the applied flexural forces can be reduced by
increasing the t-bolt spacing or reducing the anchor spacing. The channel lip strength is a value derived via testing. The
design strength of the channel lip may be reduced if the t-bolt
spacing spaced closely is less than 2 times the width of the
channel profile, (2b ch ) and are loaded simultaneously (in tension).
The applied bending moment at the channel is derived under the
simplified model where the channel profile is treated as a simple
supported beam, with a span equal to the anchor spacing. One of the 5 interaction equations requires the verification of the
channel lip in tension combined with the flexural strength of the
channel profile. The applied bending moments can be reduced
by reducing the anchor spacing.
The work around for applications where the channel lip strength
is not adequate is adding a t-bolt or increasing the t-bolt
spacing. This is generally acceptable at corner conditions. For
typical conditions, adding a t-bolt may have the same cost as
going to a bigger channel size. For other applications, the use of
a bigger channel profile may be required.
Note: adding more anchors may negatively impact the concrete
breakout strength of the anchor under consideration. For
HAC CRFoS U, there is no concrete breakout in tension and
therefore, adding more anchors is always a viable solution.
If concrete strength does not control but the anchor-channel
connection and anchor strength is limiting the design, consider
using an anchor channel with more anchors. Refer to price
index to asses if an anchor channel with more anchors or a
bigger channel is more economical.
11. Best
Practices
Bending of channel, ΦM s,flex
See price index to determine if it is more feasible to use a bigger
anchor channel or to add an anchor.
WORK-AROUND: ADD ANCHORS
Solution option 2: use longer HAC with increased bolt
spacing
Design status: ok
10. Design
Software
Solution option 1: use HAC CRFoS U
Design status ok
9. Special Anchor
Channel Design
Steel: A nchor ΦN sa
8. Reinforcing
Bar Anchorage
As-is
Design status: Not ok
7. Anchor Channel
Design Code
Anchor channel: HAC-50 106/450 F
Utilization: 100%
Bolt spacing: 7.125”
Anchor channel Price Index: 0.335
350
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
351