74 MMC


assemblies as a complete system (for performance and durability as well as manufacturing operations). Also, prototype and test to investigate performance over wide ranging and seasonal variations (including extreme weather effects of climate change) and for the expected lifespan of products. Lastly, it’s key to build in realistic tolerances to allow systems to be effectively and effi ciently assebled


SITE OPERATIONS


It’s important to be aware here that manufacturer assurances and warranties do not remove the need for site supervision and checks. Consider sequence of assembly and allow for visual inspection of key construction details. Other site-based factors that need bearing in mind are protecting the structure from changing weather conditions during assembly, and the need to build groundworks to tighter tolerances which will readily accept precisely engineered modules or panels.


CONSIDERING DIFFERENT APPROACHES Sadly, there is no MMC method or material that is suitable for all sites and all building types.


Careful choices must be made between tried and tested traditional techniques and numerous innovative systems, considering


WWW.HBDONLINE.CO.UK


RIGOROUS DETAILED DESIGN, RESOLVING CONSTRUCTION DETAILS AND SPECIFYING ALL COMPONENTS, IS ESSENTIAL BEFORE MANUFACTURE CAN COMMENCE


both the eneral benefi ts of offsite construction and inherent characteristics depending on the material used. The suitability of different construction approaches or the combination of diverse technologies will depend on many factors. However, there are some recognisable affi nities between the aroaches and common site constraints as well as project types or tenures. With this in mind, there is no shortcut when commissioning and designing off-site construction systems. Early investment in design, appropriate choice of system and oversight of onsite operations is critical to deliver high-quality, long-lasting and stylish homes that meet the needs of their occupants.


If the lessons of the past are learned – basic good practice construction detailing is followed, a standard template is used but homes are responsive to their environment, and systems build upon and employ existing prefabricated building components – factory-built homes can benefi t the industry, hel address the housing crisis and contribute to tackling the climate emergency. To fi nd out ore download the free


NHBC Foundation report on ‘Modern methods of construction: Building on experience’ by scanning the QR Code.


Richard Smith is head of standards, innovation & research at NHBC


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