Cushion rack arrangement

Claim 1

A RAILWAY CAR PARTICULARLY ADAPTED FOR TRANSPORTING LADING IN MODULAR UNITS INCLUDING HIGHWAY TRAILERS, CONTAINERS AND THE LIKE COMPRISING, TRANSVERSELY SPACED SIDE SILLS, A CENTER SILL OF BOX-LIKE CONSTRUCTION INCLUDING A PAIR OF SPACED SIDE WEB PORTIONS EXTENDING LONGITUDINALLY BETWEEN A PAIR OF SPACED TRUCK ASSEMBLIED, A BOTTOM COVER PLATE JOINING SAID SPACED SIDE WEB PORTIONS ALONG LOWER MARGINAL EDGES TO HOLD THE SAME IN SPACED RELATIONSHIP AND RESIST TENSILE LOADING, A TOP COVER PLATE JOINING SAID SPACED SIDE WEB PORTIONS AT UPPER MARGINAL EDGES, SAID TOP COVER PLATE EXTENDING TRANSVERSELY BEYOND EACH OF SAID SIDE WEB PORTION THEREBY DEFINING A LONGITUDINALLY EXTENDING TRANSVERSELY PROJECTING FLANGE PORTION ALONG EACH SIDE OF SAID CENTER SILL ADAPTED TO TRANSMIT LOADS RECEIVED THEREON TO SAID VERTICAL SIDE WEB PORTIONS, FLOORING MEANS DISPOSED BETWEEN SAID SIDE SILLS AND SAID CENTER SILL AT A LEVEL BELOW SAID PROJECTING FLANGE PORTIONS OF SAID TOP COVER PLATE, MOVABLE SUPPORT MEANS IN OVERLYING RELATION TO AT LEAST A PORTION OF SAID TOP COVER PLATE, SAID MOVABLE SUPPORT MEANS INCLUDING TRANSVERSELY SPACED FIRST AND SECOND LOAD RECEIVING MEMBERS EXTENDING LONGITUDINALLY OF THE CAR AN BEING SLIDABLY MOUNTED ON SAID MARGINAL FLANGES OF SAID COVER PLATE OF SAID CENTER SILL, SAID MOVABLE SUPPORT MEANS EACH COMPRISING A SUBSTNAIALLY U-SHAPED SECTION EMBRACING SAID RESPECTIVE FLANGES AND INCLUDING A SUBSTANTIALLY HORIZONTAL LOAD RECEIVING SURFACE OVERLYING AND EXTENDING SUBSTANTIALLY CONTINUOUSLY THE LENGTH OF SAID TOP COVER PLATE OF SAID CAR AND ADAPTED FOR ENGAGING THE UNDERSIDE OF CONTAINERS BETWEEN END SILL PORTIONS THEREOF, AND MEANS INTERCONNECTING SAID MOVABLE SUPPORT MEANS TO SAID CAR TO CUSHION THE LONGITUDINAL MOVEMENT OF SAID MOVABLE SUPPORT MEANS AS IT MOVES RELATIVE TO SAID CAR IN RESPONSE TO IMPACTS APPLIED THERETO.