Polybags Ltd Warehouse Extension in Lyon Way

Beta Scope

•   Design the steel structural for the warehouse extension in Lyon Way, Greenford, London, UK.
•   Structural Design of the hot-rolled steel structure for the warehouse extension.
•   Foundations Design of the warehouse pad footings.
•   Design of concrete industrial ground floor slab according to TR34.
•   Advise to client on planning for the industrial commercial unit and complying with the local authority local policy.
•   Advise to client on building regulations and complying with building control requirements with regards to insulation, fire protection, rain water drainage, surface drainage and other building control requirements.

Background

Beta Design Consultants were appointed by Polybags Ltd to prepare the most efficient structural design for the warehouse extension in Lyon Way, Greenford, London, UK. The proposed warehouse extension was a pitched roof hot-rolled steel portal frame with a 19m span opening and 41m length to suit the land geometry.

Beta Solution

Beta Structural Engineers established the conceptual and preliminary design, which produced the approximate member sizes, the steel quantities and the foundations sizes. This initial design allowed the Client to establish construction cost and make budget decisions.

This was followed by a detailed structural analysis, with the use of Scia Engineer, to define the exact sizes and to standardize the sections for efficient fabrication and installation. A critical decision at the conceptual design stage was the overall width and height of the frame to provide adequate clearance for the internal functions of the building which in our case is the storage of the Polybags products. The products will be stored on racks which will be supported on 200mm thick reinforced concrete slab. The steel frame was modelled, analysed and designed with the use of different softwares to ensure compliance with the governing structural codes Eurocodes (EN 1994-1-1).

Practical Details

Scia Engineer was used for the modelling, analysis and design of the structure according to the EN 1993 British BS-EN NA. Our design made use of guidance in the Eurocode to consider the nominal stiffness of base plates and allow for 20% of the column stiffness when checking deflections. This allowed us to produce a very efficient structural design.

The Foundation Design was carried out with the use of Tekla Tedds according to pad footing analysis and design of BS8110-1:1997. The concrete industrial ground floor slab design was also carried out from Tekla Tedds in accordance with TR34, 4^th Edition 2013.

Having completed the design, Beta Structural Engineers produced General Arrangement Drawings – Plans and Elevations; as well as detailed drawings for the foundations and connections design.