Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures. Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures. Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures. Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures. Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures. Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures. Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures. Steel structure engineering is a structure mainly made of steel, consisting of steel beams, columns, trusses, and other components made of steel sections and plates. The components or parts are usually connected by welds, bolts, or rivets, and are one of the main types of building structures.