Author: A. Khan and R. Dixon (Swanton Consulting)
1 February 2018
First published: 1 February 2018
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A. Khan and R. Dixon (Swanton Consulting)
Hoarding can be erected using a modular system or be a bespoke installation. It can be made using a wide range of materials, such as steel, timber or plywood, which may be re-useable or disposed of after use. Hoarding can incorporate barriers, gates and viewing windows, and may be used to display warning and information signs.
This article provides an introduction to the design of conventional timber hoardings using plywood sheets.
The design of timber posts follows the same principles as the design of vertical structural elements formed from other materials. Extreme fibre stresses or buckling due to applied axial forces are the key components affecting a post’s ability to perform. The major difference is the anisotropic nature of timber, which, for vertical elements, has a significant impact on the assessment of their performance as a structural member.
The design of timber elements in the UK, according to current codes of practice, is based on limit state theory. This Technical Guidance Note adopts this approach to describe the design of timber posts. The note assumes that the reader is familiar with the use of coefficient factors prevalent within BS EN 1995-1-1 (Eurocode 5), as described in Technical Guidance Notes Level 1, No. 18 Design of timber floor joists and Level 2, No. 14 Design of unrestrained timber beams.
Last month’s article in the series covered the theory and detailed methods recommended for calculating backpropping loads. This article continues by discussing some of the design issues and preconceptions related to backpropping, and gives worked examples.
A structure in its permanent state cannot be ‘wished into place’. Appropriate consideration must be given to construction methodology so that permanent works can be optimised, temporary works minimised and trade interfaces simplified. This article presents a list of general, high-level considerations that relate to construction methodology and optimisation of temporary/permanent works, with a number of examples provided.