Abstract: A process for manufacturing a curved panel for use in constructing a cylindrical storage tank is described. In an embodiment of the process, a flat plate is automatically conveyed into a CNC cutting station to form all bolt holes and cut-out features and to trim the plate to a defined outer dimension. After the cutting station, the plate is automatically conveyed into a roll-forming line configured to form parallel flanges long both longitudinal edges of the plate. Respective leading end regions of the two flanges may undergo a swaging operation by a pair of laterally opposing hydraulically-powered swage dies to form an integral chime region of each flange. After the swaging operation, the plate is automatically conveyed into a roll bending unit configured to curve the flanged plate into an arc to form a finished panel.

Abstract: A cylindrical shell for a tank of a railway tank car is made using roll-forming technology and straight longitudinal weld seams. The cylindrical shell has a longitudinal axis and a uniform cross-sectional shape in a plane normal to the longitudinal axis. The cylindrical shell includes a plurality of elongated segments welded together along weld seams extending parallel to the longitudinal axis of the cylindrical shell. Each elongated segment forms a portion of the cross-sectional shape of the shell and is formed by passing a flat piece of metal plate stock material through a roll-forming machine configured to progressively bend the piece of stock material. In one embodiment, exactly three identical elongated segments, each defining an arc of 120 degrees, are welded together along adjacent longitudinal edges to form a cylindrical shell having a circular cross-section.

Abstract: A highway guardrail post comprises an elongated one-piece roll-formed metal body including a front wall defining an attachment face, a pair of opposing side walls orthogonal to the front wall, a first pair of inverted corners respectively connecting the pair of side walls to the front wall, and a second pair of inverted corners respectively extending from the pair of side walls and terminating in a pair of spaced rear edges to define a rear access opening opposite the front wall. The guardrail posts may be manufactured by roll-forming a metal sheet or coil and cutting the roll-formed metal sheet or coil into lengths.

Abstract: A highway guardrail post comprises an elongated one-piece roll-formed metal body including a front wall defining an attachment face, a pair of opposing side walls orthogonal to the front wall, a first pair of inverted corners respectively connecting the pair of side walls to the front wall, and a second pair of inverted corners respectively extending from the pair of side walls and terminating in a pair of spaced rear edges to define a rear access opening opposite the front wall. The guardrail posts may be manufactured by roll-forming a metal sheet or coil and cutting the roll-formed metal sheet or coil into lengths.

Abstract: A highway guardrail post comprises an elongated one-piece roll-formed metal body including a front wall defining an attachment face, a pair of opposing side walls orthogonal to the front wall, a first pair of inverted corners respectively connecting the pair of side walls to the front wall, and a second pair of inverted corners respectively extending from the pair of side walls and terminating in a pair of spaced rear edges to define a rear access opening opposite the front wall. The guardrail posts may be manufactured by roll-forming a metal sheet or coil and cutting the roll-formed metal sheet or coil into lengths.

Abstract: A prefabricated panel assembly for use in constructing a marine vessel comprises a plurality of elongated, roll-formed metal panels fixed sided to side by longitudinal weld seams. The panels include a plate portion and an angle portion adjoining the plate portion along a longitudinal primary bend, the plate portion having a generally flat panel segment, the angle portion having a web generally orthogonal to the panel segment and a flange generally parallel to the panel segment and adjoining the web along a secondary bend. The panel assembly provides a more efficient and cost-effective alternative to using individual structural steel angles welded to individual steel plate in constructing a marine vessel.

Abstract: A prefabricated panel assembly for use in constructing a marine vessel comprises a plurality of elongated, roll-formed metal panels fixed sided to side by longitudinal weld seams. The panels include a plate portion and an angle portion adjoining the plate portion along a longitudinal primary bend, the plate portion having a generally flat panel segment, the angle portion having a web generally orthogonal to the panel segment and a flange generally parallel to the panel segment and adjoining the web along a secondary bend. The panel assembly provides a more efficient and cost-effective alternative to using individual structural steel angles welded to individual steel plate in constructing a marine vessel.

Abstract: A nailable floor having a plurality of modular floor planks having a planar web spanning between two side flanges. The side flanges extend to bottom flanges that provide support from the underframe of a railcar. The planar web, side flanges and bottom flanges are all integrally formed from a single member.

Abstract: A nailable floor having a plurality of modular floor planks having a planar web spanning between two side flanges. The side flanges extend to bottom flanges that provide support from the underframe of a railcar. The planar web, side flanges and bottom flanges are all integrally formed from a single member.