Frequently asked questions
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What is a galvanized metal deck?
A galvanized metal deck is a corrugated steel sheet coated with zinc for corrosion protection. It is used as a formwork for concrete slabs, structural support, and roofing applications in commercial, industrial, and residential projects.
What thicknesses and gauges are available for metal decks?
Standard galvanized metal decks are typically available in gauges ranging from 16 to 22 (thicker to thinner). The exact thickness depends on load requirements and span conditions.
Can galvanized decks be used outdoors?
Yes. The zinc coating protects against corrosion, making galvanized decks suitable for exterior applications, though additional coatings or paint may be recommended for harsh environments (such as coastal areas).
Where are galvanized metal decks commonly used?
They are widely used in high-rise buildings, warehouses, parking garages, schools, stadiums, and industrial plants for both floors and roofing systems.
What are steel joists?
Steel joists are lightweight, open-web truss systems made from high-strength steel. They are designed to carry heavy loads over long spans and support floors, roofs, and mezzanines.
Do steel joists require welding on-site?
In many cases, joists can be fastened with bolts or mechanical connections, reducing welding needs. However, welding may be required in some projects depending on engineering specifications.
Are steel joists required to be certified by the Steel Joist Institute (SJI)?
In many U.S. jurisdictions, SJI certification is recommended or required to ensure compliance with building codes and quality standards. Always check state and local regulations.
What types of projects use steel joists?
Steel joists are ideal for projects requiring large open spaces without interior columns—such as shopping centers, gyms, auditoriums, and factories.