Can anyone guide me to a good source for Prestressing Jack assembly? I need to prestress some sample slabs with Steel, GFRP and CFRP, but I can not find a good place that explains how the bars can be gripped on the jack end. Would I simply use a wedge? If so how can I adapt it to a hollow jack? I see the enerpac and other jacks have a great system but we can't afford those since these are just test models. I've simply been looking at getting a 5 ton hollow jack, and pump for the first run. I have visited PTI and PCI with no results. Any help is greatly appreciated.
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