This bldg was built on a platform extension from the RR wall that’s been in place for 20 years… Notice the bulge in the 12 foot long wall… Only 1" out at the center. Not bad for 20 years. 4" x 6" posts every 4 feet. 30" below grade 24" above.
(http://freightsheds.largescalecentral.com/users/larry_mosher/USMC/22.jpg)