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
11.1 Code Compliance 11.2 HAC Price Index 11.3 Design Optimization 11.4 HAC Layout 11.5 Substrate Considerations 11.6 HAC Specications
Optimize fixture
REPOSITION SLOTTED HOLE TO INCREASE BACK-SPAN AND REDUCE WIN LOAD
ECCENTRICITIES
Oftentimes, a minor modification to the location of the slotted hole, without requiring a new die may help saving thousands of dollars.
Nominal bracket and WL information
x1 = 2.5 in.
e
WL
= 2.5 in.
Slotted hole allows for +/- 1" up and down tolerance
Additional information
c
a1
= 3.5 in.
WL = 3500 lb (factored)
(only will load is applied, for illustration purposes)
Concrete compressive strength = 4,000 psi
Assume (2) t-bolt spaced at 6" O.C.
For analysis purposes, the critical bracket position is down.
Therefore, for analysis purposes, the x
1
value is reduced by 1 in.
while the e
WL
is increased by 1 in.
The above figure illustrates a screen shoot of the example in
discussion, modeled in PROFIS Anchor Channel. Although the
bracket in the model is not a "J" type bracket, the software
assumes a rigid bracket.
Therefore, the key dimensions are the paying leg (backspan, x
1
)
and wind load eccentricity (e
WL ,1
). The bracket has a true hole,
therefore, the bracket position is manually positioned assuming
the worst position; bracket down.
In summary, the nominal dimensions need to be manually
adjusted to account for the critical bracket position.
Nominal Dimensions Bracket Down Dimensions
x
1
= 2.5 in. x
1
= 1.5 in
e
WL ,1
= 2.5 in. e
WL ,1
= 3.5 in.
HAC-60 148/300 F with (2) HBC-C 8.8F M16x60 yields a
utilization of 100%. Concrete breakout in tension is the
governing failure mode.
Optimized fixture: move the anchor channel and the slotted hole 1 in. down.
The figure below (left) shows the original configuration; the anchor channel has an edge distance (ca1) equal to 3.50 in. The right
figure shows the new anchor channel location; the edge distance is equal to 4.50 in.
Note that the overall bracket geometry has not been changed. Moreover, the position of the "J" bracket does not change neither.
HAC-40 91/300 F with (2) HBC-C 8.8F M16x60 yields a utilization of 94%. Connection anchor-channel is the governing failure mode.
ORIGINAL BRACKET CONFIGURATION
Nominal Dimensions Bracket Down Dimensions
x
1
= 2.5 in. x
1
= 1.5 in
e
WL ,1
= 2.5 in. e
WL ,1
= 3.5 in.
Edge distance, c
a1
= 3.50 in.
OPTIMIZED BRACKET
Nominal Dimensions Bracket Down Dimensions
x
2
= 3.5 in. x
2
= 2.5 in
e
WL,2
= 1.5 in. e
WL,2
= 2.5 in.
Edge distance, c
a1
= 4.50 in.