In this case, the least visible portion of the support structure-the concrete anchors-had great potential to derail a time sensitive project. The GC (a repeat customer) brought us in early, and understood that the review process on a complex job takes time and coordination.
#Anchoring to hollow core plank install#
For starters, this install ended well, but critical decisions made early in the design process could have led to a very different outcome. We don’t typically dedicate an entire post to a discussion of concrete anchors, but this installation offers some key takeaways that may serve you well in the future. Our knowledge of concrete, medical support systems, and available anchoring products saved the general contractor boatloads of money-and time. The test results confirmed a secure connection at each anchor point, ensuring the safety of the x-ray equipment, as well as the lab technicians and patients. To eliminate any potential concerns over safety, each of the 12 anchors connecting the support structure to the concrete ceiling was pull-tested at 500 lbs:
HDI-P Loads–Normal-Weight Concrete and Hollow Core Concrete Panels Each anchor features a lip to ensure flush installation, consistent anchor depth, and easy rod alignment. The Hilti-HDI-P is an internally threaded, flush mounted expansion anchor designed for solid and core panels, precast plank, and post tensioned slabs.
We don’t come across hollow core concrete panels in hospital settings often, but when we do, we recommend Hilti HDI-P drop-in anchors. One suggested option-reinforcing each hollow section panel with liquid grout-wasn’t feasible because the process would have taken 2-3 weeks and put the GC behind schedule and over budget. In this case, our GC had concerns over securing 1,000 pounds of x-ray equipment to a hollow core panel style ceiling with traditional concrete anchors, per his supplied drawings. The low-cost, hollow core concrete ceiling sections commonly used in office building construction can create significant design challenges in hospital settings.
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