A transportable support assembly securely holding a container therewithin, said transportable support assembly comprising: the container, which is a cylinder, a first clamp spaced apart from a first plate; a second plate located a predetermined distance away from the first clamp; multiple elongated rods (9a, 9b, 9c, 9d) extending between the first plate and the second plate and defining a first side of the transportable support assembly and a second side of the transportable support assembly, said second side substantially diametrically opposed to the first side; the first plate, the second plate and the multiple elongated rods (9a, 9b, 9c, 9d) being arranged to create a protective opening, said protective opening adapted to receive the container that can be secured to a second clamp located on the second plate; and a handle located at a predetermined handle height along the first side, said handle operably connected to one or more of the multiple elongated rods (9a, 9b, 9c, 9d); a first wheel and a second wheel spaced apart from the first wheel by a first predetermined distance, each of said first wheel and said second wheel operably connected to the second plate along the first side, said first wheel and said second wheel being non-rotatable around a vertical axis; a third wheel operably connected to the second plate along the second side, said third wheel being rotatable around a vertical axis; characterized by a dead man brake actuator extending along at least a portion of the handle, said dead man brake actuator in mechanical communication with the first wheel and the second wheel(lb), said dead man brake actuator movable between an activated state and a deactivated state, wherein the dead man brake actuator in the deactivated state is configured to prevent movement of the transportable support assembly and wherein the dead man brake actuator in the activated state is configured to allow movement of the transportable support assembly; and a protective ring operably connected to the first plate, said protective ring comprising an opening facing the first side of the transportable support assembly, wherein the protective ring partially encapsulates a valve of the cylinder so as to protect the valve from rupture in the event that the cylinder or a top portion thereof, when mounted onto the transportable support assembly, falls onto another surface. the container, which is a cylinder, a first clamp spaced apart from a first plate; a second plate located a predetermined distance away from the first clamp; multiple elongated rods (9a, 9b, 9c, 9d) extending between the first plate and the second plate and defining a first side of the transportable support assembly and a second side of the transportable support assembly, said second side substantially diametrically opposed to the first side; the first plate, the second plate and the multiple elongated rods (9a, 9b, 9c, 9d) being arranged to create a protective opening, said protective opening adapted to receive the container that can be secured to a second clamp located on the second plate; and a handle located at a predetermined handle height along the first side, said handle operably connected to one or more of the multiple elongated rods (9a, 9b, 9c, 9d); a first wheel and a second wheel spaced apart from the first wheel by a first predetermined distance, each of said first wheel and said second wheel operably connected to the second plate along the first side, said first wheel and said second wheel being non-rotatable around a vertical axis; a third wheel operably connected to the second plate along the second side, said third wheel being rotatable around a vertical axis; characterized by a dead man brake actuator extending along at least a portion of the handle, said dead man brake actuator in mechanical communication with the first wheel and the second wheel(lb), said dead man brake actuator movable between an activated state and a deactivated state, wherein the dead man brake actuator in the deactivated state is configured to prevent movement of the transportable support assembly and wherein the dead man brake actuator in the activated state is configured to allow movement of the transportable support assembly; and a protective ring operably connected to the first plate, said protective ring comprising an opening facing the first side of the transportable support assembly, wherein the protective ring partially encapsulates a valve of the cylinder so as to protect the valve from rupture in the event that the cylinder or a top portion thereof, when mounted onto the transportable support assembly, falls onto another surface.