02-04-2010, 12:37 PM
I can't give you an authoritative answer about time periods for concrete "tilt up" construction, but in exploring the Los Angeles Junction Rwy, I've noticed that in the city of Vernon, which is the older of the two cities the LAJ operates in, that any tilt up buildings are recent construction where an older building was demolished and replaced with a tilt up. The City of Commerce is a post ww2 city that was formerly agricultural, and the most common buildings there are tilt ups. Vernon is mostly brick (all sorts of colors), concrete cinder block, or sheet metal buildings. Many of the brick buildings have decorative art deco details in concrete on the fronts facing the street.