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I am in the process of expanding. can I elevate on a curve? It would be an 18" rad. curve on a very gradual incline or is this not suggested? If so, what rise grade should I attempt. After the curve + grade, it will be straight and then a wye to run two tracks on the upper level. My main question is: If it is ok to elevate on a curve, what will work best to use for the risers, how close should I place a riser to the next one, and what size should each riser increse if I wish my elevation to be 3 1/2 inches?
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