How to Extend the Service Life of Steel-Frame Buildings?

Steel-frame buildings are highly durable and typically have a service life of around 100 years; however, due to various factors, few actually last that long. The following four key measures can effectively extend their service life, comprehensively addressing the entire lifecycle—from materials and construction to the environment and operations and maintenance:

1. Rigorous Material Selection: Ensuring Compliance from “Structure” to “Details”

Based on the building’s structural load characteristics and usage scenarios, carefully select suitable steel materials to ensure their strength fully meets requirements. Even down to the smallest connecting bolt, every component must comply with long-term service standards to prevent substandard materials from shortening the overall lifespan.

2. Design and Construction: Maintaining “Quality Standards” in Both Phases

We clearly define material specifications and strength parameters, and meticulously perform structural calculations and design to eliminate potential hazards caused by design deviations. We select compliant fire-resistant and welding materials and properly handle component joints; we implement standardized processes (such as applying two coats of anti-rust paint to steel structures and using color-coated steel sheets with ≥180 g/m² electro-galvanized coating and a “two-coat, two-bake” process) to enhance the structure’s external corrosion resistance.

3. Environmental Adaptation: Prioritizing Prevention in “High-Risk Scenarios”

Dry environments have minimal impact on steel structure corrosion; therefore, special attention must be paid to environments with high humidity and highly corrosive air.
Such environments tend to cause damage to building edges and corners first, accelerating steel rusting and the peeling of protective coatings; targeted protective measures must be implemented in advance.

4. Regular Inspections to “Delay Aging”

The specifications for steel structures should clearly state usage conditions and maintenance requirements. For example, steel structures should undergo periodic inspections to extend their service life. Under normal environmental and stress conditions, the corrosion depth of steel structures is approximately 0.4 mm per decade (excluding corrosive environments); therefore, special attention must be paid to environmental conditions and maintenance.