Quote:
Originally Posted by Big Dave
5-6" is close. Drive it over some railroad grade crossings and what is left will tell you what will work. My guess is that 8" is probably A-OK.
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I have one RR crossing on my commute, but it's very level & smooth. There's another one not far from my house that's awful that I go over once & a great while. I should go see how they do on that crossing.
Quote:
Originally Posted by Big Dave
Another piece of advice from having done this: clamp the front and rear edges firmly. Your skirt will try to vibrate like an oboe/bassoon double reed. If not clamped firmly even ripstop will wear through .
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That's why I constructed them the way I did. As you can see from the pic in post #11, I made a "spline" of 3/4" thick wood that's drilled & bolted on. The sheeting is sandwiched between the spline and the sheet metal.