Interview with Lu Dekun Engineer: What is the difference between light steel structure and heavy steel structure?
Author： Date：2018-01-16 From： Hits：14
In recent years, the housing of Meishu house light steel structure is very hot, but a lot of you do not understand the light steel structure and heavy structure in the end what is the difference, Xiaobian in order to understand clearly. Specially came to the US villa site, interviewed the original broad ship international hull structure engineer, the current villa manager of light steel equipment management engineer --- Lu Dekun.
Lu Dekun: light steel structure building system, based on hot-rolled light H steel, light welded steel, high frequency welded steel, cold-formed thin-walled steel, thin steel and thin-walled steel and other high-performance structural steel and efficient functional materials to A range of highly efficient decorative joining materials, assembled as a subassembly to complement the light-weight, fully assembled steel construction that meets the architectural specific usage and space requirements.
Light steel structures are mainly three kinds of architectural forms: light gantry steel housing, cold-formed thin-walled steel structure, steel structure. The original light steel structure is mainly used for smaller loads, small span of the building. After the 1980s, it has been widely used in warehouses, offices, industrial plants, sports facilities and so on. Heavy steel structure applications: large petrochemical plant facilities, large forging plants, port facilities, large-span stadium, exhibition center, high-rise or super high-rise steel structures.
Light steel and heavy steel there is no clear boundary. Light steel structure design, taking into account the strength of the web buckling, can reduce the stiffener settings, making use of steel to reduce. This is the light steel structure. Otherwise the amount of steel will be a lot, that is, heavy steel structure. However, light steel structure is generally only used for crane tonnage less than 20t, heavy tonnage crane will be used heavy steel structure, light steel structure safety is not enough.
Judging structure for heavy steel and light steel structure does not have a uniform standard, many experienced designers or project managers are often not fully understand, but we can take some of the data into account and to judge:
1, lifting the weight of plant traffic: greater than or equal to 25 tons, can be considered heavy steel structure.
2, the amount of steel per square meter: greater than equal to 50KG / M2, can be considered heavy steel structure.
3, the main components of steel thickness: greater than or equal to 10MM, light steel structure with less.
4, there are some reference values: such as cost per square meter, the maximum weight of the component, the maximum span, structure, eaves higher, these above determine whether the plant is heavy steel or light steel can provide empirical data, of course, many buildings are Light, heavy steel has.
5, in fact, the national norms and technical documents are not heavy steel one said that in order to distinguish the light steel structure of the house, may call the general steel structure as "general steel" more appropriate. Because of the wide range of ordinary steel structures that can encompass a wide range of steel structures, regardless of load size or even many aspects of lightweight steel structures, the technical specifications for light steel building structures specify only a few more specific Content, and the scope is limited to single-storey portal frame.
6, light steel is also a vague term, generally can have two kinds of understanding. One is the current "Design Code for Steel Structure" (GBJ 17-88) Chapter XI "light steel bar, small angle steel structure" refers to the use of round steel and less than L45 * 4 and L56 * 36 * 4 The light steel structure made of angle steel is mainly used in the small structure which is not suitable for the manufacture of reinforced concrete structure when the steel is lacking. Now it is basically not used widely, so the steel structure design code revision has basically been removed. The other is the single-story solid belly portal frame structure with light-weight roof and light-weight outer wall (which can also be conditionally adopted with masonry outer wall) as stipulated in Technical Specification for Steel Structure of Portal Frame Light-weight Housing, Light here mainly refers to the use of lightweight materials. Since the former has been quickly canceled, so now the meaning of light steel mainly refers to the latter. This shows that the light steel and general steel is not the distinction between the severity of the structure itself, but in the light of the weight of the support material, and in the structural design concept is the same.
This shows that light steel and general steel is not the distinction between the severity of the structure itself, but in the light of the weight of the supporting material, structural design concept is still the same.