The casualties and property losses caused by building fire accidents caused by colored steel plates are huge and distressing. The fire safety situation is not optimistic. Based on the actual situation of fire protection work, this paper analyzes and discusses the basic properties, fire risk and fire management of color steel sheet.
The basic properties of 1 colored steel plates
Color steel plate refers to color coated steel sheet, which is a kind of steel plate with organic coating. Its characteristics are good corrosion resistance, convenient processing and molding, and bright coloured appearance. It has three kinds of substrates: cold rolled substrate, galvanized substrate and galvanized substrate. The coating consists of four kinds of polyester, silicon modified polyester, two fluoroethylene and plastic sol.
It has the following four main properties:
1) the weight is light but the strength is high
At present, the color steel plate which is widely used on the market is equal to 1 / 15 - 1 / 20 of the concrete material, which is equal to 8 KS / M 22 kg / m, and the tensile strength of the substrate is 4500 kg / cn12 - 6000 KS / em. The advantages of light weight and high strength make it widely used in industrial buildings, combined buildings and I temporary buildings.
2) good heat insulation and heat insulation.
The composite board is commonly used as thermal insulation material, such as rock wool, glass fiber cotton, polystyrene, polyurethane, etc., with low thermal conductivity and excellent thermal insulation effect.
The domestic research and the practical application for more than 40 years abroad have proved that the shelf life of the steel plate treated by the unique coating is in l0 year L5 years, and the anticorrosion coating is sprayed every 10 years, and the sheet life of the plate can reach more than 35 years.
4) processing and installation are very convenient.
During construction, it can be arranged flexibly, combined at random, the operation is relatively simple, and no skilled workers are required. The construction period can be shortened by more than 4o%.
Color steel plates are widely used in all fields such as construction, household electrical appliances and transportation, among which the largest proportion of the construction field, the second of the household appliance industry, and the smaller part of the transportation industry.
Most of the color steel plate used in the building is based on hot galvanized steel plate and hot plated aluminum zinc plate, with polyurethane, polystyrene board, extruded plate and glass cotton as core materials. The heat cured high strength adhesive is used to compact and pressurize through the automatic continuous molding machine, that is the sandwich color steel plate. During construction, the sandwich panel is usually made of light-weight H steel and channel steel, and the sandwich panels are used for wallboards or roofs, bolted or welded.