Hello again "nycboy" ---
Check this page link out --- this is a TUTORIAL page that should address your most basic questions --for starters. Excellent text and photos laden "how to" instructions for "Model EL Construcxtion" - in O SCALE.
http://www.nycmodeltransit.org/ModelEl.htm
You can use parts as described in my own lengthy listings in my much further above earlier message - and incorporate PLASTRUCT and EVERGREEN large LATTICE Girders where needed. However, most EL's today (those built past 1900 as such) are Plate Girder construction thru-out, to handle heavy rolling stock.
Regards - Joe (Frank)
