I want to build a bridge that will provide the best weight to mass ratio.A brick will be placed on the very top of the bridge (not on the bottom platform) and a machine will apply certain pressure to the brick.Sosay the bridge has a mass of 50 grams, and will hold a weight of 150 pounds, then the ratio would be 3, which is good.I am currently considering building a pratt, howe, warren, or warren (w/ verticals) bridgeI do not knwo which one will be best for this projectPlease help and give any tipsThanks and happy holidays!
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I was eating lots of fiber and I weighed the same eevry week.stopped eating too much fiber and started seeing weight loss.I don't know why
you want to make the bridge as tall as possible without having to worry about Lateral Torsional Buckling of the system (tipping over) once the weight is appliedThis will increase the moment of inertia of the system, thus making it stifferAs far as which truss is better, it does not matter, the whole idea of a truss is to create a large beam with minimal material in the middle, hence we take out the middle and replace it with truss membersJust make sure that the middle (longitudinally) is relatively stablePut more material in the top and bottom chords of the truss and you will have the strongest bridge with high moment resistanceIf the span is relatively short you will want to beef up the web membersOtherwise stick to the above.
