- How much is a square meter of steel structure?
- What is the price composition of steel structure?
- What is the steel consumption per square meter of various buildings?
- Is steel structure or concrete structure suitable for the main structure of various buildings?
How much is a square meter of steel structure?
This is a kind of keyword with extremely high search volume in Baidu. The search element asking about the price of steel structure occupies four of the top 20 search volume of “steel structure” related keywords.
In the field of construction engineering, more people are engaged in concrete structure than steel structure. Especially in the third and fourth tier cities, new buildings are still mainly concrete structures, and steel structures are still a few.
Many people are familiar with the cost of concrete houses and want to know how much a square meter of steel structure is?
First of all, it needs to be clarified that people in the steel structure industry hardly need to ask the cost of steel structure “how much is a square meter of steel structure?” people in the industry generally ask: how much is a ton of steel structure? In the engineering construction link, the pricing unit of steel structure is weight tonnage.
What is the price composition of steel structure?
I understand that in the engineering industry, the price of steel structure is generally calculated by tonnage. Let’s talk about the composition of steel structure engineering price.
The price of steel structure generally includes:
(1) The price of materials is mainly the price of steel. The price of the most commonly used Q235B or q355b steel is generally 3000~5000rmb per ton, depending on market price fluctuations.
For example, the unit price of 20mm plate in the last 15 years reached a historical high of 6300rmb per ton in mid-2008 and a historical low of 2500rmb per ton in early 2016. In the past two years, the price of medium and heavy plate fluctuated between 3000 and 5000rmb per ton.
Many websites can query the information price of steel. For example, there is a “steel price today” menu on the homepage of wechat official account of “steel structure design”, which is convenient to query the price of all kinds of steel.
The price queried is the price excluding the seller’s profit, tax and freight. These additional costs are relatively fixed and account for a small proportion. It is very accurate for most people to want to know the approximate steel price.
(2) The processing cost of steel components in the factory is generally 1000~3000rmb per ton, which is determined according to the project scale, processing difficulty, component type, whether it is curved, whether it is assembled, anti-corrosion and derusting requirements and other factors.
It mainly includes material cutting and blanking, drilling, assembly, welding, correction, sandblasting, grinding, priming, arc bending (arc component), assembly (special-shaped assembly component), component transportation, manufacturer’s profits, taxes and other expenses in the factory.
(3) The installation cost of the construction site is generally 1000-3000rmb per ton, which is determined according to the project scale, installation difficulty, construction measures, etc.
It mainly includes the use fee of the crane on site, the measure fee of the support, the safe and civilized construction fee, the construction auxiliary materials, the anti-corrosion of the intermediate paint and finish paint, the fireproof coating, the profit of the construction unit, taxes, etc.
Taken together, the comprehensive unit price of conventional steel structure engineering is generally 7000-14000rmb per ton.
What is the steel consumption per square meter of various buildings?
Understand the unit price per ton of steel structure. For owners, they are concerned about the price per square meter of the main structure of steel structure houses. This requires understanding the steel consumption per square meter of the main structure of the building. Cost of steel structure per square meter (yuan / square meter) = steel consumption per square meter (kg / square meter) x comprehensive unit price of steel structure (yuan / kg).
The steel consumption per square meter of steel structure buildings is related to the use function, structural layout, architectural shape, external load that the building needs to bear, geographical environment and other factors.
For example, the steel consumption per square meter of Beijing bird’s nest is much higher than that of other common stadiums and gymnasiums, which is to meet the special architectural shape and greatly increase the steel consumption per unit area.
In general, the steel consumption of the main structure of the single-storey plant is 25~100 kg / m2 (calculated according to the building area), which is different according to the height, span, structural layout, driving tonnage, wall and roof material type, external hanging weight, local wind, snow and earthquake natural environment and other factors of the plant.
The steel consumption of the main structure of the multi-storey plant (building) is 35~150 kg / m2 (calculated according to the building area). In addition to the same influencing factors as the single-storey plant, the equipment operating weight and other live loads on each floor are also important influencing factors.
For long-span space buildings, the steel consumption of buildings with different shapes varies greatly, and there is no obvious law.
For example, the large-span coal shed steel structure, which has developed rapidly in recent years, has large span and small roof load. The steel consumption of the main structure is 40~80 kg / m2 (calculated by surface area), and the influencing factors are similar to those of single-storey plants.
Is steel structure or concrete structure suitable for the main structure of various buildings?
In general, the structure type of various buildings mainly depends on the type of buildings, and a variety of structure types can be selected.
(1) Steel structures are mainly used in industrial plants, large-span venues, super high-rise buildings, high-rise structures and special-shaped space buildings.
It is difficult for concrete structures to achieve these special architectural shapes and functions, or to achieve the same shape, the construction of concrete structures will be much higher.
In these types of buildings, steel structure can give play to its advantages of fast construction speed and high material strength, and it is relatively easy to achieve large height, span and complex shape.
(2) In the field of multi-storey and high-rise residential buildings, concrete structures have more price advantages.
Concrete structure has more advantages in fire resistance, corrosion resistance, durability and maintenance free performance, and it is mainly concrete structure in the residential field.
In recent years, various regions have begun to promote prefabricated steel structure housing, which is more a factor at the policy level.
(3) For commercial, office and other public buildings, steel structure and concrete structure have their own advantages, and there will be more and more buildings with steel structure in the future.
With the increasing proportion of labor cost in the construction cost (in the past two decades, the prices of main building materials and construction machinery have not changed much, but the labor price has increased several times), the advantages of fast construction speed and low labor consumption of steel structure have been gradually brought into play.
At present, more and more commercial, office and other public buildings in the first and second tier cities use steel structure as the main structure.
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