Hi all, after a lot of helpful advice regarding the Site Design vignette, I'm enclosing my latest Grading vignette. I think it should be OK with regards to minimum and maximum slopes, but if anyone sees any glaring errors, please let me know!
An issue regarding the grading slope, I just re-read Norman Dorf's comments on this vignette, and he mentions that there is a maximum allowable slope between the edge of the slab and the contour "pad" immediately below it. So, if we were to follow the NCARB practice, with 1' contour intervals and a 20% max. slope, there would need to be a minimum of 2'-6" from the edge of the locomotive display and the contour immediately below (in my example, the 107' contour). However, I would imagine that slope is not an issue in this case, as it is not a landscaping/grading feature, more of a "step" between the display slab and the grass. Does anyone else agree?