Steel Structure of Container Houses
The steel structure of container houses typically uses steel frame materials, with some employing low-alloy high-strength structural steel. Common steel grades include Q195, which offers wind and earthquake resistance, as well as corrosion resistance.
The main structure of container houses centers around steel frame materials, which are connected via welding or bolts to form a framework that provides foundational support for the house. Steel frame structures possess high strength and rigidity, enabling them to bear significant loads. Additionally, through rational structural design (such as increasing the cross-sectional dimensions or quantity of beams and columns), the house's wind resistance can be effectively enhanced. For example, in coastal or windy regions, steel structures can reduce wind-induced vibrations by optimizing node connections (such as using high-strength bolts or welding), ensuring stability in strong wind conditions.
Some container houses select low-alloy high-strength structural steel as their primary material. This type of steel enhances strength and toughness by adding small amounts of alloying elements (such as manganese, silicon, and vanadium) while maintaining good weldability and workability. Compared to ordinary carbon steel, low-alloy high-strength structural steel reduces material usage and lowers the house's self-weight under the same load-bearing capacity, further enhancing wind and earthquake resistance. For instance, in earthquake-prone areas, container houses using low-alloy high-strength steel can reduce seismic inertial forces by lightening the structural weight, lowering the risk of collapse.
Q195 is a common steel grade in the steel structures of container houses. It belongs to carbon structural steel with a relatively low carbon content (approximately 0.12%-0.19%), offering good plasticity and weldability, making it easy to process into various structural components (such as angle steel, channel steel, and H-beams). Q195 has a yield strength of 195 MPa and is suitable for non-load-bearing structures or auxiliary components with lower strength requirements (such as wall supports and door/window frames). For higher strength requirements, grades like Q235 and Q345 can be selected, but Q195 remains widely used in container houses due to its lower cost and ease of processing.
The surface of steel structures typically undergoes corrosion protection treatments (such as hot-dip galvanizing or spraying anti-rust paint) to enhance corrosion resistance. Hot-dip galvanizing forms a zinc layer on the steel surface to isolate oxygen and moisture, extending the service life to over 20 years; spraying anti-rust paint creates a chemical barrier to prevent corrosive media from contacting the steel, suitable for dry or mildly corrosive environments. Additionally, the design of steel structures must consider drainage paths to prevent water accumulation and local corrosion, further ensuring the long-term stability of the house.
