In the Philippines, steel systems have gained traction due to their strength-to-weight advantage, speed of erection, seismic resilience, and modular adaptability.

This section introduces the key metal systems used in local construction projects—from high-rise buildings to industrial facilities and intricate façades—highlighting their respective features, advantages, and best-use applications.

1. Hot-Rolled Steel Sections
Hot-rolled steel sections (like I-beams, H-beams, channels, and angles) are manufactured through rolling at high temperatures. These are commonly used in conventional steel structures where strength, versatility, and code compliance are required.

2. Built-Up Welded Sections (Box Girders, base plates, long span girders)
Welding plates fabricate built-up steel sections together to form box, H, or I shapes. This method allows custom engineering of structural components to meet specific project needs such as long spans, high loads, or architectural constraints.

3. Cold-Formed Steel Sections (C-Purlins, Z-Purlins, Channels)
Cold-formed steel sections are fabricated by bending thin steel sheets at room temperature to form lightweight members, typically used for secondary structural elements and roof or wall framing.

4. Pre-Engineered Steel Building (PEB) Systems
PEBs use a combination of tapered built-up members, cold-formed elements, and standardized connection systems to provide modular and optimized steel structures, fabricated off-site and assembled on-site.

5. In Architectural Metalworks (Stainless, Aluminum, Cladding)
Architectural metals such as stainless steel, aluminum, and metal cladding panels are widely used for façades, handrails, curtain walls, louvers, and decorative components. These materials blend functionality with modern aesthetics.

An industrial warehouse and steel parking buildings will lean toward PEBs for economy and speed. High-rise towers often combine hot-rolled steel cores, cold-formed wall framing, and architectural metals for cladding.

Infrastructure projects such as bridges and elevated roads will use built-up sections to address customized sizing and logistical considerations.

Cost of metals fluctuate more than concrete. The reader is advised to monitor movement of global and local steel prices to manage these fluctuations.