Going to build trailer ramps. Can be no thicker than 2". 6' long
Thank You in advance.
2006-09-21 14:32:45 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Never use solid steel bars for ramps, way to heavy. Always use angle iron. Use 2" X 2" X 3/16" or 1/4" thick angle iron. Make a box frame out of angle iron and short pieces in-between going up box frame. If you want a drawing just ask.
Good luck...
2006-09-21 15:12:42 · answer #1 · answered by Johnny 5 · 0⤊ 0⤋
The section modulus for a rectangle is (b*h^2)/6 where b is the width and h is the thickness in the direction of bending.
The answer about not using solid bar is right. However, if you do use angle iron there are two important issues. If you use a single angle you must consider non-symmetric bending which makes your structure considerably weaker than the simple section modulus would predict. The calculation involves applying the components of the moment vector around the principal moments of inertia. If you need to figure that out, most mechanics of materials texts explain it.
The second issue pertains to bolting together two beams (angle or otherwise) to form a composite beam. If you do that, make sure you consider the in-plane shear along the beam. This usually requires that you need more bolts than you might think to attach the beams to each other.
2006-09-21 18:44:44 · answer #2 · answered by Pretzels 5 · 0⤊ 0⤋
1018 mild steel. Not suitable for bladesmithing. If you can't heat treat find an old file, grind it out (keep it cool) and put in an oven @ 400F. Modern car/truck springs are 5160 med chrome steel, a good blade quality steel and forgiving on the anvil/heat treat.
2016-03-17 23:48:37 · answer #3 · answered by Anonymous · 0⤊ 0⤋
you may want to buy an AISC steel design manual
2006-09-21 18:04:01 · answer #4 · answered by ms mystery 3 · 0⤊ 0⤋