Buildings are divided into two categories: steel structure and concrete structure. Steel structure is made of section steel, steel plate and steel pipe through welding, bolting or riveting.
Engineering structure, concrete.
Structure: It is an engineering structure that combines two materials: steel and concrete to form an overall common force.
So steel for construction
Generally, it can be divided into steel for steel structure and steel for reinforced concrete structure. Steel for steel structure mainly includes section steel, steel plate, steel pipe, and steel for concrete structure
Main
For steel bars and steel strands.
1. Steel for steel structure
1. Section Steel
There are many types of section steel, which is a solid long steel with a certain cross-sectional shape and size. According to its cross-sectional shape, it is divided into simple and
Two types of complex sections. The former includes the circle
Steel, square steel, flat steel, hexagonal steel and angle steel; the latter includes rails, I-beams, H-beams, channel steels, windows
Frame steel and special-shaped steel, etc.
2. Steel plate
Steel plate is a flat steel with a large width-to-thickness ratio and large surface area. According to the thickness, there are thin plates (below 4mm) and medium plates (4mm-
20mm), thick plates (20mm-
There are four types of 60mm) and extra-thick plates (above 60mm). Steel strips are included in the steel plate category.
3. Steel pipe
The steel pipe is a long strip of steel with a hollow section. According to its different cross-sectional shape, it can be divided into round tube, square tube, hexagonal tube and various special-shaped sections.
Surface steel pipe. According to different processing technology
It can be divided into two categories: seamless steel pipe and welded steel pipe.
2. Steel for concrete structure
1. Rebar
Steel bar refers to the straight or wire rod-shaped steel used for reinforced concrete reinforcement, which can be divided into hot-rolled steel bars (hot-rolled round bars HPB and hot-rolled ribbed
Rebar HRB), cold-rolled twisted steel bar
(CTB), cold-rolled ribbed steel bar (CRB), the delivery status is straight and coiled.
2. Steel wire
Steel wire is another cold processed product of wire rod. According to different shapes, it can be divided into round steel wire, flat steel wire and triangular steel wire. Wire in addition to direct
In addition to use, it is also used to produce steel wire
Rope, steel thread and other products. Mainly used in prestressed concrete structures.
3. Steel strand
Steel strands are mainly used for prestressed concrete reinforcement.