Provided is a rail vehicle that can promote a weight reduction of the rail vehicle by providing a film body in a side film or a ceiling film, can ensure a large vehicle inner space, can prevent the occurrence of stains, scratches, and the like. The rail vehicle includes an underframe including a floor portion, side structures that each have a window and are erected along a longitudinal direction of the side structures at both end portions in a width direction of the underframe, and side films provided along surfaces of the side structures on a vehicle inner side. Each of the side films has a window opening portion at a portion corresponding to the window, and a window frame portion that presses a peripheral edge portion of the window opening portion toward the side structure is provided.

A method of insulating a structural frame member of a transport vehicle is provided. The method includes coupling a first end of at least one flexible insulation member to one of at least two self-retaining foam insulation members using a coupling element. The method includes wrapping the at least one flexible insulation member over a first free end of the structural frame member of the transport vehicle and over at least portions of two sides of the structural frame member. The method further includes positioning one of the self-retaining foam insulation members on each side of the wrapped structural frame member and in compression fit between each side of the wrapped structural frame member and adjacent structural frame members, such that the self-retaining foam insulation members impart one or more compression forces on the flexible insulation member to secure the flexible insulation member in place without use of any fastener device.

A method of insulating a structural frame member of a transport vehicle is provided. The method includes coupling a first end of at least one flexible insulation member to one of at least two self-retaining foam insulation members using a coupling element. The method includes wrapping the at least one flexible insulation member over a first free end of the structural frame member of the transport vehicle and over at least portions of two sides of the structural frame member. The method further includes positioning one of the self-retaining foam insulation members on each side of the wrapped structural frame member and in compression fit between each side of the wrapped structural frame member and adjacent structural frame members, such that the self-retaining foam insulation members impart one or more compression forces on the flexible insulation member to secure the flexible insulation member in place without use of any fastener device.

An insulation system, for use with transport vehicle structural frame members, having at least a first structural frame member and adjacent structural frame members in a transport vehicle. Each structural frame member has a first free end, a second end attached to a transport vehicle wall, and two sides disposed between the first and second ends. The system has at least one flexible insulation member wrapped over the first free end and over at least portions of the two sides, and at least first and second self-retaining foam insulation members positioned on each side of the wrapped first structural frame member and disposed in compression fit between each side of the wrapped first structural frame member and each of the adjacent structural frame members. The foam insulation members impart one or more compression forces on the flexible insulation member to secure it in place without use of any fastener device.