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Here’s a conundrum…
Did somebody order the spinning loading platforms???
Preston Hire – ‘count on us’.
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Holdfast Training Services Trial Blog 
At risk of looking foolish, taking moments at Ra and ignoring Rc, I get 5t at 2.25m to be pretty much balanced by 6.6t at 1.643m. Granted I’ve ignored the contribution at Rc and the fact that this is a very simple indeterminate problem easily solved by Moment distribution but as a quick check it looks about right?
Ouch – egg on my face! Lucky I didn’t send ‘Preston hire’ my thoughts.
I took moments about A and couldn’t get them to balance. I also couldn’t see how the prop at C could be in tension?
I’ll email you my FBD.
No egg at all. It is wrong. There’s 1.1t missing vertically somewhere so although close, it’s pretty unimpressive if this is their technical data. If you need design input then you’d certainly go back and ask how they make this work.