Fire-resistant materials for steel structures

1. The selection of the fire protection layer in the design for the fabrication and installation of steel structures should take into account various factors such as the specific requirements of the building, its fire resistance rating, the operating environment, and costs. Common fire protection coatings for steel structures include: – Fire-retardant coatings: these are divided into intumescent fire-retardant coatings and non-intumescent ones; they are applied to the surface of steel, and when heated, they expand rapidly to form a thermal insulation layer. - Fireproof board covering: Steel components are wrapped with sheets made of fire-resistant materials to create a physical barrier. - Sprayed mortar: A layer of fire-resistant sand material is sprayed onto the surface of the steel structure to form a protective layer. - Concrete wrapping: Covering the steel structure with concrete not only enhances the structural strength but also provides good fire resistance. During design, relevant **or regional codes should be followed, with selections made based on the specific requirements of the construction project. 2. When applying the fire-retardant coating purchased by the property owner, it is usually necessary to conduct the following tests and prepare the corresponding documents: – Fire resistance test: A third-party testing and certification agency is used to determine the fire resistance level of the coating, to ensure that it meets the fire resistance requirements specified in the design. - Adhesion strength test: To ensure that the coating adheres firmly to the steel surface and does not peel off under fire conditions. - Coating thickness testing: In accordance with the product instructions and design requirements, it is checked whether the coating thickness is uniform and whether it meets the fire protection requirements. - Test reports and certification documents for the materials: including fire resistance reports for coatings, environmental protection certifications, quality compliance certificates, etc. - Construction process records: It is necessary to document construction environment factors such as coating conditions, time, temperature, and humidity, as well as the qualifications of the workers and the steps taken in the construction process. - Construction quality inspection report: After the construction is completed, it is necessary to inspect the quality of the fireproof coating and issue a report. - Usage and Maintenance Instructions: Provide the owner with guidelines for using and maintaining the coating to ensure its stable performance throughout use. The specific requirements for the aforementioned tests and data may vary depending on regional regulations and standards, as well as the specific characteristics of the project; the project specifications and contractual requirements shall prevail. Before construction, specific testing standards and requirements should be agreed upon with the owner to ensure the effectiveness and safety of the fireproof coating. .