Earthwalker wrote:Thanks, Crypto. I looked them up online and still felt the way I did when I asked my question. I see how they work, but, from what I see (and I'm no engineer type), it's the tarp that has the upper hand/lead role (sorry, can't think of a better way of describing it), in that the tarp is pulling away from the structure (see below), as opposed to a fastener on the structure that would pull the tarp taught. Not sure that makes any sense, but my concern is that with bungee balls, the tarp is in control, and thus will be loose.
With bungee balls, you can usually double-wrap them so that they'll bind to themselves and not come loose. The main concern with bungee balls is that they're a type of static, point-to-point rigging. The problem with this is that loads can't be redistributed in the presence of winds or other forces. The elastic in the bungees help with this, but still can result in specific areas of the tarp receiving loads that can't be properly redistributed.
For cheaper tarps having static rigging with wind gusts can mean that the eyelet will get pulled out of the tarp, along with causing a rip, in other cases the bungee will snap. One year, we used bungees for our Costco carport roof and some of the eyelets really received a lot of strain and we had to cut hole flaps in the roof to permit the wind to flow through it. Fortunately, it was an aftermarket carport tarp, not the one that came with the carport, and maybe that was also a reason it performed so poorly.
Last year, we used a running-rigging configuration with the tarp on our Costco carport and it perfectly, and was easier to do than bungees. You can read more about different types of rigging here
. It may be helpful for other structures, such as Costco carports, etc.
Still, for monkey huts bungee balls aren't really a problem, and may be preferred.
Unlike rigid structures, the monkey hut's flexible PVC frame helps redistribute the load, and it is part of the magic behind why the monkeyhut can survive wind gusts where rigid structures may not. Bungee balls are also good for the monkey hut because, unlike rope or other types of rigging meant for distributing loads, the bungees bind to the PVC and keep the tarp in place.