![]() an interesting thing to add in one way or another is a cage round the pipe enclosing a valve. There's proably structural reasons why the smaller ones tend to be supported while the bigger ones are supported about 50% of the time while 50% are self supporting. The smaller ones are often flanged at the joins while the big ones appear to be continuous so are probably welded. The great thing with these pipes is that they are frequently utilities (gas, water, sewage, drains) so they don't need any industry or other explanation. I especially like them around tunnels as they break up the routine way of going off-scene. Sometimes these pipes are on their own, sometimes multiples (not necessarily the same) and sometimes they are adjacent to a bridge or tunnel mouth. Despite this the grafitti people still get in if they can. Sometimes barbed or razor wire is added if there is a particular problem. In almost all cases in an urban situation the pipe itself or the end area is usually fenced with steel railings or spikes. With a (masonry lined or similar trench) it is usually a straight pipe. ![]() With a cut this is sometimes an arch of pipe. Something we see here and I've seen pics of for places like the NE corridor (pretty urban bits of RR) is pipes emerging from the side of a cut or trench, crossing the track and back into the ground on the other side. I love pipes over trrack to both hide scenic breaks and to add variety to the otherwise ordinary. What do you want to achieve with the overhead pipe(s)? Is it just a link between factory parts or are you using it/them to hide something.
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