Structure: Approved Document A

O N L I N E V E R S I O N A1/2 Guidance Introduction 0.3 Grandstands and structures erected in places of public assembly may need to sustain the 0.1 In the Secretary of State’s view the synchronous or rhythmic movement of numbers requirements of A1 and A2 will be met by of people. It is important to ensure that the design following the recommendations given in the of the structure takes these factors into account documents listed in Section 1 or by adopting so as to avoid the structure being impaired or the guidance in Sections 2-4: causing alarm to people using the structure. a. Section 1 is relevant to all building types Guidance on the design and testing of and lists Codes, Standards and other grandstands may be found in ‘Dynamic references for structural design and performance requirements for permanent construction but, where they do not give grandstands subject to crowd action – precise guidance, consideration should Recommendations for management, design be given to paragraph 0.2. and assessment’ published by The Institution of b. Section 2 give sizes of structural elements Structural Engineers, December 2008. for certain residential buildings and other small buildings of traditional construction. c. Section 3 gives guidance on the support and fixing of wall cladding. d. Section 4 gives guidance where roofs are to be re-covered as a material alteration as defined in the Regulations. 0.2 The safety of a structure depends on the successful combination of design and completed construction, particularly: a. The design should be based on identification of the hazards to which the structure is likely to be subjected and assessment of the risks. The selection of relevant critical situations for design should be made reflecting the conditions that can reasonably be foreseen during future use. b. Loading. Dead load, imposed load and wind load should be in accordance with the current Codes of practice referred to in Section 1 of this document. c. Properties of materials. d. Detailed design and assembly of the structure. e. Safety factors. f. Workmanship. The numeric values of safety factors, whether expressed explicitly or implicitly in design equations, or design values, should be derived from considerations of the above aspects of design and construction as a whole. A change in any one of these aspects may disturb the safety of the structure. Loads used in calculations should allow for possible dynamic, concentrated and peak load effects that may occur. Structure Approved Document A 6 O N L I N E V E R S I O N