Overview
The following set of guides replace BG 9/2011 Rules of Thumb 5th Edition. Information has been updated based on consultation with designers and manufacturers.
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BG 84/2024 Space and Weight Allowances provide useful information for the early stages of design. Graphs are provided on areas, heights and weights of mechanical, electrical and public health equipment. Information is also included on floor space allowances, space for access, occupancy densities and means of escape.
BG 85/2024 Mechanical Criteria provides useful information for the early stages of design of heating, cooling, ventilation, and public health systems. This includes heat system temperatures, water consumption and airtightness criteria.
BG 86/2024 Electrical Criteria provides useful information for the early stages of design of electrical building services. This includes voltages, ingress protection (IP) ratings and recommended lighting levels.
BG 87/2024 Useful Information Guide provides useful reference information for building services projects. This includes CO2 emissions factors and criteria for compliance with Part L of the Building Regulations.
An enhanced building services glossary has been added, defining key terms for the industry, and new information has been included on resilience classifications for data centres and noise ratings.
BSRIA would be very pleased to receive feedback on this guide – what’s missing, what can be improved in the information and its presentation, and what else BSRIA can do to make buildings better. Please email any comments and suggestions to information@bsria.co.uk.