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The Hilti Anchor Channel Keeps Your Embed Budget "Lite"

question.postedBy Jesus Barredaover 5 years ago

By Jesus Barreda, P.E. & Andy Howell, E.I.T.

cast-in channel,AnchorChannel,Facade,Edge of slab,Curtain Wall Anchorage

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The HAC EDGE product line offers superior concrete edge performance in shear compared to other anchor channel systems or anchoring technologies. Additionally, this increased performance costs less when comparing shear capacity vs cost. For example, HAC-50 EDGE can provide up to 5.6 times higher concrete edge performance than HAC-50 at approximately 3½ times the cost! HAC EDGE Lite broadens the Hilti Anchor Channel portfolio for top of slab applications. Moreover, HAC EDGE Lite bridges the large gap between HAC and HAC EDGE by providing a gradual increase in concrete edge breakout capacity in shear at price points lower than HAC EDGE.

Figure 1 – HAC portfolio for top of slab applications
HAC EDGE Lite is a similar product to HAC EDGE but HAC EDGE Lite has a smaller EDGE Plate (thinner and smaller edge plate, smaller and shorter rebars). The size of the EDGE Plates is optimized to offer feasible high performing anchor channel solutions for top of slab applications that do not require the superior concrete edge breakout performance offered by HAC EDGE. Figure 2 demonstrates this step change in cost vs concrete edge shear performance between different HAC systems.

Note: concrete edge shear performance is based on pure shear loads.
Figure 2 – Cost vs concrete edge shear performance of different HAC systems
HAC EDGE Lite is offered in two different channel profile sizes, HAC-40 EDGE Lite and HAC-50 EDGE Lite, to further optimize project's design.

Figure 3 – HAC EDGE Lite
For additional information about the design model and code compliance of HAC EDGE Lite, see “Take Your Top of Slab Façade Anchorage to a New EDGE” (https://ask.hilti.com/article/take-your-top-of-slab-facade-anchorage-to-a-new-edge/wz5twx). The design concept of HAC EDGE Lite is the same as the one of HAC EDGE. Figure 4 illustrates a cross-sectional view of HAC-40 EDGE Lite and HAC-50 EDGE Lite.

Note: HAC-50 EDGE Lite is also available on hef = 106 mm and serrated channel

Figure 4 – HAC-40 EDGE Lite and HAC-50 EDGE Lite


HAC EDGE Lite PERFORMANCE

The HAC EDGE product line offers superior concrete edge performance without requiring an increased edge distance. Figure 5 provides information about the maximum shear load (due to wind) that can be applied to HAC, HAC EDGE Lite, and HAC EDGE installed in a 4” slab, 4000 psi normal weight concrete and an edge distance of 4” with (2) t-bolts spaced at 6” on center. A constant factored dead load (weight of panel) of 800 lbs is applied to each configuration. All of the design variables stayed the same with the exception of the windload to demonstrate the increase in shear capacities from HAC, to the HAC EDGE Lite, to HAC EDGE.  










Figure 5 – Comparison of concrete shear edge capacity of HAC, HAC EDGE Lite, and HAC EDGE, based on the design concept methodology stated above.
Note: the potential positive contribution of the EDGE Plate or EDGE Lite Plate to the concrete breakout strength in tension is not considered. The concrete breakout strength in tension is calculated in accordance with ICC ESR-3520 and AC232. The above concrete breakout in tension utilizations for HAC EDGE Lite and HAC EDGE differ from the standard HAC due to the higher prying forces exerted by the higher wind loads.


PROFIS ANCHOR CHANNEL 1.6.6

HAC EDGE Lite is fully covered in PROFIS Anchor Channel version 1.6.6.
Note: PROFIS Anchor Channel 1.6.6 will be released at the end of September. Please feel free to email your project to US+CA.HAC@Hilti.com. Download PROFIS Anchor Channel at https://www.hilti.com/content/hilti/W1/US/en/engineering/software/profis/profis-channel.html or
Product available on stock in December. 

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