Long Span Roofs

Long Span Roofs: All That You Need to Know

by Radhe Gupta

The roof employed is often a mystery in large buildings like warehouses and gymnasiums. They don’t always employ the same kinds of roofs that people are used to seeing on houses. Long span roofs are necessary for these constructions due to their size, requiring similarly sized structures. If you’re interested in learning about long span roofing in the Philippines, this site is for you. 

What Is It? 

Long span roofs serve the same purpose as other roofs: protection from the elements and, if necessary, insulation. They are, however, longer than standard roofs, spanning over a distance greater than 12 metres. Steel, wood, and concrete are common materials for these roofs. Due to its high strength and fire resistance, steel is the favoured material over all others. It’s great for large-scale structures, such as manufacturing facilities and aeroplane hangars, because it’s cost-effective and takes less time to erect. 

Options for Long-Span Roofs 

Duracurve, a long-span metal roof with an arc three design, looks stunning and offers any building a modern edge. Because of its wind resistance, minimal maintenance, and low cost, Duracurve is an excellent choice for gymnasiums, domes, covered courts, and elevated residential structures. 


There is a considerable incline to this roof. To ensure water tightness, the seams are mechanically sealed. It also has no holes from fasteners that could allow water to leak in. Duraseam is an excellent choice for industrial and commercial properties. 


Sinusoidal corrugation enhances the product’s structural integrity. When trodden on, it won’t dent easily. Roofing specialists recommend long-span metal roofing for schools, poultry houses, conventional warehouses, and manufacturing plants. Duracorr is also an excellent choice for residential structures because of its ease and dependability. It is, in fact, one of our most popular home roof designs. 

A long-span metal roofing product called Hi Rib is perfect for places with a lot of rain. Large amounts of rainwater can be carried by its deep corrugation design. Because it has a high rib height of 50 mm, it prevents its rib from being immersed in heavy rain and producing leaks. 

Many constructions lie under this umbrella, from simple flat trusses to complicated space frames, arch and casings, to catenary or tensegrity structures. Some define “long-span” as more than 50 metres. However, structural engineers prefer to classify these projects as ones in which many simple modelling assumptions that may be justified for more generic constructions cannot be used. Long span structures, for example, are often planned with the overall stiffness of a system in mind, rather than merely the rigidity of individual components. Complex non-linear analysis may be required if this leads to substantially larger deformations than the structural elements’ cross-sectional sizes. 

The leadership of thermal effects and movement patterns, global dynamic behaviour or excitation, systematic and logical forethought of robustness and the evasion of a single error, the impact of load inversion in light-weight structures, and the necessity of CFD analysis and testing to predict exactly wind and swell are all examples that require us to keep moving beyond the norms of design codes and towards so much experience and performance-based design. 

Free-standing roofs must also consider their constructability, which can account for 40 to 50 per cent of the entire cost. Early consideration should be the scope of the construction phase and the logistical problems of transportation, layout space and craneage, which often impact the choice of design structure and the technical design. The consequences of locked-in pressures and sequential construction can also substantially affect the design, particularly for uncertain structural forms subject to load reverse under diverse support circumstances.

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