A Conceptual Framework For Implementing Safe Structural Options and Risk Assessments in the Alteration of Structures - A Case Study of Ross House, UK

Structural alteration and refurbishment continue to account for a sizeable portion of the UK Construction Industry projects. These projects range from simple domestic extensions and alterations to very complex multi-storey building modifications and refurbishment. The more complex the project, the higher the risk to health and safety of the construction personnel. Residual risks (where risk elimination fails) may also be passed on to the users of the completed project. To mitigate this, feasibility of the proposals from an architectural standpoint must be subjected to a rigorous process of existing foundation and structural investigations aimed at generating results that will ensure that proposed solutions can be safely implemented throughout the lifecycle of the project. This research work used a case study approach to design a framework which facilitates a wholistic process of technical options and risk assessment. The procedure is also proposed as a means of integrating emerging digital technologies which are currently being used to carry out different parts of the investigative and design process. The case study building (known as Ross House) is an existing 3 storey Reinforced Concrete (RC) framed office building. It is proposed to add 2 storeys at roof level and convert the entire building into residential usage. Investigations conducted included a foundation/ structural frame assessment and structural analysis (3D modelling) for both existing and proposed conditions. The procedure was then made into a flowchart that facilitates a comprehensive approach to technical solutions and risk management. Further work is recommended to validate the procedure on other similar projects and to incorporate digital analytical processes into the finalised framework.