The Frisco had two variations of standard TOFC ramp, i.e., dirt-filled and timber. The Standard Plan Book circa 1979-1980 does not show a concrete ramp. During the late 20's and 30's the Frisco added ramps at many locations for the purpose of unloading new automobiles from flats and boxcars. The Northern Division B&B inventory shows one at Grennfield, Mo. I will post a URL later.