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I've been asked to design a tempora

I've been asked to design a tempora

I've been asked to design a tempora

I've been asked to design a temporary bridge for a 2" waterline to span 145'. Rather than do such a large structure for such a small thing, I was thinking a suspension cable set might be more appropriate. Does anyone know who does that sort of thing? I've seen those types of structures done for long span pipes but I've no idea where to direct my customer.

RE: I've been asked to design a tempora

Suggest to search the internet for suspension cable contractors. Here is one, but I don't know if they are interested in your project or not. Link Or you might ask local scaffold contractor.

Actually, for such a small weight, it would be much cheaper to design several simple hanging/upholding posts along the route.

RE: I've been asked to design a tempora

I suspect you are right, that a 145’ rigid/spanning bridge for that 2” temporary water pipe, would be a real dog. The right kind of pipe, bending strength, connections, etc. would probably tolerate being hung, at essentially the same shape, as a wire rope (or chain) catenary. Short adjustable vert. hangers would make the final support and shape adjustment btwn. the two systems. You would also need some means of guying the system to the ground at several locations to limit movements from lateral loads like wind or EQ’s, etc. This would seem to be something btwn. a suspension bridge and a tension structure (tension/fabric roofs, tents, and the like). Maybe high tension, high voltage, electric transmission cable statics and control has something to offer. They have some novel means of controlling the vibration and movement of their cables, vib. dampers and the like. So those tension structures might be another ref. source. Another issue will be the pipe movement and bending, final shape (fittings, expansion/contraction, a movement joint) at each end. This could be an interesting project and nice change of pace from the old std. temp. bridge.

RE: I've been asked to design a tempora

Be sure the pipe used has rigid joints and not push-on joints (designed for subgrade use). Otherwise, it could turn into a pretzel once pressurized.

RE: I've been asked to design a tempora

Maybe explore agricultural systems designers? The situation where I've seen similar structures is on farms where they 3D truss the pipe itself in a rather clever way. Even if your pipe can't be the compression strut, maybe it could be strapped to whatever is. See my sketch below in which I've butchered the concept pretty badly with my limited Bluebeam skills.

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