A standard N-Trak 4’ corner module is 34” deep and 68” wide (tip to tip.) A standard door opening is 28” to 32”.
If you do the math, you quickly see that a standard 4’ corner module will not fit through a standard width door without
being rotated onto its back. If, however, you whack 8½” off of the front of the module, (whack being an N-Track technical
term for cut off) you end up with a corner module that is 25½” deep, and one that can easily be moved through a standard
door opening without any special lifting or rotating.
Look for the full article in the November/December 2014 issue of N-Scale Magazine.