Securing Hoops on Artificial Courts
Don Oakley responded to a question on the Nottingham newsgroup about hoops for artificial surfaces:
We have made hoops for several installations of the type that you are questioning. A pair of 1" diameter holes - 3" deep are drilled into the concrete for each hoop. Each hole receives a 1" diameter polyethylene plug with a hole in it to receive a 3/8" pin welded to the bottom of the hoop. The holes in the plug are offset from the center of the plug which allows for adjustment of the final opening of the hoop by turning the plug in the floor.
The advantage of the poly plugs is that they offer some 'give' to the hoop and prevent eventual damage to the concrete hole by the hoop. The disruption to the floor covering is a pair of 3/8" holes at each hoop location. We've had no negative feedback from any of the locals where they've been installed so far.
Alternate to that is an above-(concrete) floor carpet hoop that employs a welded steel base placed under the carpet. It has two upright 3/8" pins welded to it that protrude through and above the carpet. Onto these is placed the hoop upper. The stanchions of this are made from a heavy walled steel tubing with a closely matched inside diameter. The advantage of this system is the lack of concrete drilling. The downside is that the hoops do tend to move around a small amount. As they are only held by the hole in the carpet, continued use means you must accept a more noticeable hole in the carpet over time.
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