The types of steel used in steel halls are:
* **Structural Steel:** This is the most common type, forming the primary framework of the building, including beams, columns, and purlins. Grades like S235, S275, and S355 are frequently used, with S355 offering higher strength.
* **Galvanised Steel:** Often used for purlins, girts, and sheeting in steel halls. The galvanisation process (coating with zinc) provides excellent corrosion resistance, which is crucial for the longevity of these components, especially in external and exposed areas.
* **Sheet Steel (or Cold-Formed Steel):** Used for cladding the walls and roofs. This can be plain or profiled for increased strength and is often galvanised and painted for weather protection.
* **High-Strength Steel:** In some larger or more complex steel hall designs, higher-strength steel grades might be specified to reduce the amount of material needed without compromising structural integrity.
* **Stainless Steel:** While less common due to cost, stainless steel might be used in specific areas where extreme corrosion resistance is necessary, such as in food processing facilities or chemical plants.
The specific grade and type of steel chosen depend on various factors including the span of the building, the loads it needs to support (wind, snow, operational loads), environmental conditions, and economic considerations.
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