MMC and Off-Site Construction

Construction, Design, Sustainability

Modern Methods of Construction is an evolving process in the delivery of buildings, through efficiency gains in time, materials and cost. There are also significant gains to made in Health & Safety and quality of finished elements.

A key point to note about MMC is that the various methods employed will generally all encompass an element of off-site manufacturing; that is construction activities of buildings being assembled under cover, finished and tested prior to being installed on site.

Advantages and points to note on MMC:

1. On-site building erection times are generally quicker, along with a watertight enclosure achieved
2. With the construction and assembly of components in a factory, a superior finish can be achieved through quality control measures not subject to the challenges of the weather. This is still dependent on the quality of machinery and/or the trained contractors operating them.
3. From a sustainability and social perspective, MMC brings many benefits including reduced wastage of materials through precision quantity measurements, reduced delivery movements and energy used on site. For the labour force there is a significant benefit of improved working environments under cover, with closer quality control measures, especially in climates similar to the UK’s or colder. All weather working can have the impact of improving health & safety records in the construction workplace, as RIDDOR incidents can be significantly reduced. The process of inspecting and snagging defects is also made more consistent under cover.
4. On site, successful MMC delivery requires accurately managed & setting out of foundations and structural members to accommodate the precision engineered elements that will be situated on them and have probably already been manufactured before the concrete has set!
5. MMC will typically require an advanced level of design detail and construction logistics planning prior to a start-on-site. Space requirements need to be considered access for large pre-fabricated or modular elements, as well their potential storage. With regards to design, there’s little room for on-site design changes as is very common with traditional construction methods.
6. Use of BIM technology is synonymous with MMC, as all the components needed to construction building elements can be precision modelled and tested in 3D, scheduled, costed and interrogated endlessly prior to commuting to design freeze and manufacture.

A future blog will delve into the various types of MMC. Watch this blogspace for more info….

Image credits: http://www.lowenergyhouse.com