Abstract: A conventional motorhome can be improved by using joists to elevate the floor of the living area of the motorhome to the level of the floor in the driver's compartment in the motorhome. Preferably tanks as are required in connection with the motorhome are located in spaces between the joists.

Abstract: A desirable travel trailer can be constructed so that the internal floor within such a trailer is capped by a series of joists located on the chassis of the trailer. The spaces between the joists can be used to hold various tanks and other items assocated with the use of the trailer. Preferably the tanks which are expected to be heaviest as the trailer is used are located directly above the undercarriage of the trailer so that the tongue weight of the trailer is not altered or significantly altered as the weight of such tanks are changed due to changes in their contents.

Abstract: The manner in which a trailer "rides" and the "towability" of a trailer can both be improved by utilizing a wheel suspension system employing a separate suspension structure for each wheel of the trailer. Each of such suspension structures includes an elongated member serving as an axle. One of the ends of such a member is connected to the chassis of the trailer using a torsional energy absorption device while the other of the ends of the member carries a wheel of the trailer. The latter end of the member is connected to the chassis of the trailer through the use of a spring. Various adjustments are embodied within the suspension structure for use as reasonably required in connection with the trailer.