It is a long strip of steel with an I-shaped cross section. I-beams are divided into ordinary I-beams and light I-beams. It is a section steel with an I-shaped cross-section. Whether the I-shaped steel is ordinary or light, because the cross-sectional size is relatively high and narrow, the moment of inertia of the two main axes of the cross-section is quite different, so it can only be directly used for members that are bent in the plane of its web or formed into a lattice-type force-bearing member. It is not suitable for axial compression members or members with bending perpendicular to the web plane, which limits its application range. I-beams are widely used in buildings or other metal structures. The selection of I-beams in structural design should be based on its mechanical properties, chemical properties, weldability, structural dimensions, etc. to select reasonable I-beams for use.

Beret pieces can be used for highway bridges, assembling gantry cranes, guide beams, bridge erectors, cradles and so on. Bere truss combination gantry crane, using assembly only let slow highway steel bridge components assembled gantry, and its span and column height adjustable to adapt to different work sites, widely used in public sliding early road, railroads, municipal, construction, water conservancy and other construction projects, bridge construction prefabrication yard finger mold lifting and transporting prefabricated components, piers next to the transport and installation of beams and other on-site construction operations.

Flange, also called flange flange disk or flange. Flange is a shaft and shaft parts connected to each other, for the connection between the end of the pipe; also used in the equipment in and out of the stool finger mouth on the flange, for the connection between the two devices, such as reducer flange. Flange connection or flange joint, refers to the flange, gasket and bolt three interconnected as a group of combined sealing structure of the detachable connection.

Carbon steel elbow is a metal pipe fitting to change the direction of the pipeline on the carbon steel pipeline. Connection methods include wire fastening and welding. According to the angle, there are 45 ° and 90 ° 180 ° three of the most commonly used, in addition, according to the needs of the project also includes 60 ° and other non-normal angle elbow. Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics. Connected with the pipe in the following ways: direct welding (the most commonly used way) flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection. According to the production process can be divided into: welded elbow, stamping elbow, push elbow, casting elbow, etc.. Other names: 90-degree elbow, right-angle bend, love and bend.

The support frame of the disc-buckle scaffolding is divided into vertical poles, horizontal poles, and inclined poles. There are eight holes on the disc, four small holes are dedicated to the horizontal poles, and four large holes are dedicated to the inclined poles. The connection methods of horizontal bars and diagonal bars are latch type, which can ensure that the bars and vertical bars are firmly connected. The horizontal bar and diagonal bar joints are specially made according to the arc of the pipe, and are in full surface contact with the vertical steel pipe. After the latch is tightened, three points of force are applied (two points above and below the joint and one point between the latch and the disc), which can be firmly fixed and increase the The structure is strong and transmits horizontal force. The crossbar head and the steel tube body are fully welded and fixed, so the force transmission is accurate.

Steel sheet piles can be divided into three shapes: U-shaped, Z-shaped, and W-shaped. They are also divided into light and ordinary cold-formed steel sheet piles according to wall thickness. The wall thickness of 4 to 7 mm is for light steel sheet piles, and the wall thickness of 8 to 12 mm is for ordinary steel sheet piles, bridge construction, cofferdams, large pipelines, temporary trench excavation, soil retaining, water retaining, sand retaining wall, wharf, unloading yard retaining wall, retaining wall Earth walls, embankments, etc.

Angle steel,commonly known as angle iron ,is a carbon structural steel used in construction. It is a long strip of steel with two sides perpendicular to each other. It is a profile steel with simple section . Angle steel is divided into equal Angle steel and unequal Angle steel. The raw billet for the production of steel angles is low carbon square billet, and the finished Angle steel is devided into hot rolled, normalized or hot rolled state. Angle steel can make up different stress components according to the different needs of the structure, as the connection between components. Widely used in a variety of building structures and engineering structures, such as beams, Bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.