![]() ![]() In addition to these benefits, a steel portal frame delivers a number of other advantages in the industrial sector. Both industrial buildings and supermarkets will require a range of ancillary spaces from back of house offices to welfare and storage areas to be incorporated alongside the primary building function and in high eaves buildings it is common for these to be situated on first floor mezzanine floor space to avoid using the more valuable open plan spaces. ![]() For example, distribution centres typically include overhead craneage and therefore require a clear internal height of 10m to 13m or more, while supermarkets and warehouses are more likely to require 4m to 6m clear height depending on the storage racking system used.Īs well as being able to provide clear internal height, the flexible nature of the space provided by a portal frame can also allow ancillary spaces to be incorporated easily within the main structure. Steel portal frames can also be constructed to a range of building heights to provide the high eaves required for certain building functions. Where multi-bay portals are required, a valley beam is often provided to remove alternate internal columns in a hit-and-miss arrangement to minimise the impact of the structure on the internal space. ‘Hit and miss’ multi-bay building during constructionĪ steel portal frame can efficiently deliver large spans from 25m to 40m with standard spacings between frames of 6m to 10m but typically 8m. They typically include metal cladding and roofing but can accommodate a range of cladding materials where planning or aesthetic considerations are important. Unlike other frames, the building envelope provides restraint to the structural steelwork, resulting in a very efficient structure. The frame comprises columns and rafters, with localised haunches at the eaves to minimise rafter section size and at the apex to accommodate the connection between the rafters. Portal frames are relatively lightweight structures that provide large clear internal spans and flexible space. The most commonly adopted structural solution to address these requirements is a steel portal frame. While these buildings have different functions and processes occurring within the space, their common design drivers of long spans, clear internal space and high bays to provide highly flexible internal layouts and to maximise floor plate efficiency result in a small range of typical structural design solutions across the sector. The industrial sector comprises buildings with a wide range of uses, from out of town retail buildings and supermarkets, distribution centres and warehouses to science parks and light industrial buildings. This article also examines the issue of sustainability with respect to frame selection, which is a further key factor in the owner occupier industrial sector, both as a method to reduce costs in use and as a key corporate driver.Īrrangement of a typical single storey industrial building It explores the importance of programme, the key cost drivers for the industrial sector and the principal factors to consider when using standard cost ranges to ensure that realistic frame costs are achieved. It builds on the general guidance on the cost of structural steelwork, and cost planning through design stages for structural steel framed buildings by considering the typical design and construction characteristics of industrial buildings. This article focuses on the cost factors and the cost planning of steel framed industrial buildings. It shows that in 2022, steel frames accounted for 98.4% of all industrial shed building construction in the UK compared with 0.3% for insitu concrete, 0.5% for precast concrete and 0.8% for load bearing masonry. The efficiency and cost effectiveness of the standard steel portal frame in this sector is reflected in the latest Construction Markets survey commissioned by the BCSA and Steel for Life. Standard steel portal frame construction dominates the sector, but other steel solutions, such as trusses, long span beams and fabricated sections may also be used to achieve the required long spans. ![]() ![]() Industrial is a key sector for structural steelwork. The sector is characterised by a common requirement for long span structural solutions, and this article therefore also considers supermarkets, which typically share this requirement. The industrial sector covers a range of building functions and types, including distribution centres, warehouses and small industrial units. ![]()
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