Nucor Corporation

Embodiments of the present invention comprise; annealing steel sheets (e.g., hot rolled steel sheets or thin cast strip steel); cold rolling the sheets in one or more cold rolling steps (e.g., with annealing steps between multiple cold rolling steps); and performing one or more of tension leveling, a rough rolling, or a coating process on the sheets after cold rolling, without an intermediate annealing step between the final cold rolling step and the tension leveling, the rough rolling, or the coating process, or the customer stamping or final customer annealing. In order to achieve the desired properties for the steel sheet, stamping and final annealing is performed by the customer. The new process provides an electrical steel with the similar, same, or better magnetic properties than an electrical steel manufactured using the traditional processing that utilizes an intermediate annealing step after cold rolling and before the stamping and final annealing.

A method of direct reduction of iron (DRI) is disclosed, the method comprising generating metallic iron by removing oxygen from iron ore using a reducing gaseous mixture with excess carbon monoxide that produces an excess CO 2 by-product is provided. CO 2 by-product is optionally sequestered. A system for carrying out the method is also disclosed.

Joists of a structural roofing system typically comprises an upper chord, a lower chord, and web(s), which operatively couple the upper chord to the lower chord. The upper chord and the lower chord may each be formed from two angle members (e.g., otherwise described as L-shaped members). The web may also be formed from a plurality of web members, such as angle members. The joists utilize nailer members on the upper chord to provide a location for assembly with decking panels. The nailer member is attached to the upper chord through the use of nailer plates, which have a plurality of perforated apertures that form teeth. The nailer plate is bent, the teeth are pressed into the nailer member, and plate connections are used to assemble the nailer plates (e.g., manually, automatically, or both) to the upper chord of the joist to form a joist and nailer assembly.

The present disclosure relates to a coating of a press hardened steel strip, the coating providing cathodic protection. The coating of the post-press hardened steel strip comprises zinc, aluminum, and at least one element selected from manganese (Mn) and/or antimony (Sb).

A system and method of direct reduction of iron (DRI) is disclosed, having a reduction unit configured to reduce iron oxides to metallic iron; a process gas heater coupled to the reduction unit, the process gas heater configured to supply the reduction unit directly with a source of heated reducing gas, where the process gas heater is further configured to receive a synthetic combustion air stream for heating the reducing gas, the synthetic combustion air stream comprising a source of oxygen with essentially no nitrogen. A method of carbon dioxide emission reduction from a direct reduction of iron (DRI) process is also disclosed.

A joist assembly system that is structured for dynamic retrieval of components, dynamic and precise positioning and location of retrieved components, assembly of the components to form a joist, and delivery of the assembled joist. The joist assembly system has a plurality of material handling systems, a plurality of welding systems, and a rigging table system. The material handling systems are structured to load and position the components such as chords and webs onto the rigging table. The rigging table in turn supports the chords or webs. Subsequently, the plurality of welding systems weld the webs to the chords to form the joist.

A joist tie may be designed to increase the strength of the joist tie and reduce the thickness of the joist tie, in order to provide the desired strength and the ability to make connections that operatively couple structural decking, the joist tie, and joists together using a single connector in one or more locations. The joist tie may be strengthened through the use of one or more ribs and/or one or more flanges. The one or more ribs may be formed to fit within one or more cavities within adjacent joists located in series. As such, the shape of the joist tie may be dimensioned in order to allow the joist tie to be placed on a first joist and a second joist without having to be attached until after assembly of the structural decking on top of the joist tie and joists.

Joists of a structural roofing system typically comprises an upper chord, a lower chord, and web(s), which operatively couple the upper chord to the lower chord. The upper chord and the lower chord may each be formed from two angle members (e.g., otherwise described as L-shaped members). The web may also be formed from a plurality of web members, such as angle members. The joists utilize nailer members on the upper chord to provide a location for assembly with decking panels. The nailer member is attached to the upper chord through the use of nailer plates, which have a plurality of perforated apertures that form teeth. The nailer plate is bent, the teeth are pressed into the nailer member, and plate connections are used to assemble the nailer plates (e.g., manually, automatically, or both) to the upper chord of the joist to form a joist and nailer assembly.

A hot rolled, ultra-high strength, complex metallographic structured or multi-phase structured steel that improves formability during stamping or forming process, while possessing one or more of the following properties: excellent castability, rollability and coatability, excellent structural performance, excellent stretch formability, excellent stretch flangeability, excellent dent resistance, excellent durability, excellent impact performance, excellent intrusion and crash resistance without the purposeful addition of boron.

Support members for a roof system are provided to allow for positioning panels of a roof apart from building members so that building components, such as insulation may be placed between the roof panels and the building members. The support members may be utilized in new buildings or to retrofit existing buildings. Each of the support members may comprise a single support member that has a base portion operatively coupled to an offset portion that is operatively coupled to an upper portion. One or more channels may be provided in the base portion, offset portion, and/or the upper portion to provide structural support and to allow the support members to be operatively coupled to each other and other building members without the need for additional components.