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Space Frame Steel Roofs: A More Cost-Effective Choice for Large-Span Buildings Than Concrete

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 When planning large-span buildings—from industrial warehouses and exhibition halls to transportation hubs—selecting the right roof system is not just a structural decision, but a financial one that impacts budgets for decades. Concrete has long been a traditional option for such projects, valued for its familiarity rather than its long-term efficiency. However, space frame steel roofs have emerged as a superior alternative, delivering cost savings that extend far beyond upfront expenses and align with the practical needs of modern large-span construction. The myth that concrete is the cheaper choice often stems from a narrow focus on material costs alone. While concrete may have a lower price per ton at first glance, this ignores the full scope of expenses that come with concrete roof installation. Space frame steel roofs, by contrast, are engineered for efficiency at every stage, starting with their lightweight and modular design. Unlike concrete roofs, which require massive, rei...

Chessboard-shaped quadrangular pyramid grid

 

Chessboard-shaped quadrangular pyramid grid

Structural features: The spatial stiffness is smaller than that of the square pyramid grid, and the internal force of the lower chord increases. When the perimeter is arranged into a full cone, the stiffness is better. This grid has a short upper chord under compression and a long lower chord under tension, which can give full play to the role of the cross section of the rod and bear reasonable force.

 

Applicable conditions: Applicable to peripheral support grids with a rectangular plane shape, a side length ratio greater than 1.5, and small and medium spans.

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