Standard for Rail Elevation
Standard for Rail Elevation
(OP)
Is there a standard for drawing rail elevations. I've attached a sketch with two approaches. The detailed one has a line for each transition in curvature. The simplified one has lines for the mid point of the sloped portion of the head and base. Is the simplified one common practice?
Dik
Dik





RE: Standard for Rail Elevation
I would've thought that a rail cross-section is a standard that belongs to the client, if not the over-seeing agency (so I would expect e.g. a single standard for all HSR in Europe).
RE: Standard for Rail Elevation
The CL is the centre of bolts for a 40# rail... I drew the lines close enough to show the relative points of the curves/tangents they represented, I thought. I didn't show any of the fillet radii.... Rail sections come with relatively standard dimensions and 'fittings'; they are not normally 'client' driven.
To draw all the points of transition as lines, leads to a 'cluttered' drawing as shown. I don't know if there's a standard manner of showing this. With W-Sections, I don't show the fillet lines and with S-Sections (I-Sections) I show the mid point of the tapered flange.
Dik
RE: Standard for Rail Elevation
In a simplified view, I show lines at the theoretical sharp upper outer corner of the flange, and the t.s.c. of the bottom of the rail head, but I'm aware of no standard.
In a detail view, I show lines wherever the curvature changes, as you have, just because it adds clarity and a bit of style. I also, sometimes, truncate all those extra lines, just showing them near rail ends, mostly so the pseudo-shaded rail doesn't dominate the view.
Mike Halloran
Pembroke Pines, FL, USA
RE: Standard for Rail Elevation
DIk