Everyone talks about bridges, but what about power and telegraph lines?
Can’t speak for power, but when I wor ked for BT, drop wires crossing the street were supposed to be 5.25m min at their lowest droop.
Just make it make sense! Imperial or metric - not a mix n match! 
fredthered:
Just make it make sense! Imperial or metric - not a mix n match!
Yeah, coz we all know what good comes of mixing and matching viewtopic.php?f=2&t=127285