Terrace cast-in-place and steel structures are common forms of building structure, which have some differences in materials, construction methods, and applicable scenarios.

1. Materials:

-Terrace cast-in-place: The cast-in-place structure of the terrace usually uses concrete as the main material, and the structure is formed by on-site pouring of concrete. Concrete has high strength and durability, and has good wind resistance, seismic resistance, and waterproof performance in outdoor environments.

-Steel structure: Steel structure mainly uses steel as the main material, including steel columns, steel beams, steel frames, etc. Steel has the characteristics of high strength, lightweight, and good plasticity, making it suitable for large-span, high-rise buildings, or places that require rapid construction.

2. Construction method:

-Terrace cast-in-place: The cast-in-place structure of the terrace requires concrete pouring and maintenance on site, including scaffolding, formwork construction, reinforcement arrangement, and concrete pouring. This construction method is relatively traditional and requires a certain amount of time and labor.

-Steel structure: Steel structures are usually constructed by prefabrication and on-site assembly. After processing and anti-corrosion treatment, the prefabricated steel components in the factory are assembled and welded on site. The steel structure construction speed is fast, suitable for projects with rapid construction and modular design.

3. Applicable scenarios:

-Terrace cast-in-place: The cast-in-place structure of the terrace is suitable for places that require emphasis on continuity, personalized design, and small spans, such as residential terraces, hotel terraces, and outdoor platforms in commercial buildings.

-Steel structure: Steel structure is suitable for places with large spans, high-rise buildings, industrial factories, etc. that need to withstand large loads and provide flexible space. Steel structures can achieve large spatial spans while also possessing high plasticity and seismic performance.

It is necessary to choose the appropriate building structure form based on specific project requirements, design requirements, and budget factors. In the process of design and construction, it is also necessary to follow the relevant Building code and standards to ensure the safety and stability of the structure.