Self-build home: Prepare production information
In this stage, we attribute design activities to ‘designers’. These may be architects and engineers, a design and build contractor, or a kit house supplier. If a kit house supplier is only supplying the house itself, additional design consultants may be required.
Production information may include:
- Drawings (location drawings, component drawings and dimensioned diagrams).
- Specifications, calculations and design criteria. Specifications provide descriptions of the materials and workmanship required. Design criteria might include; environmental conditions, acoustic requirements, critical dimensions, accessibility requirements, loadings and so on.
- Bills of quantities or schedules of work. Bills of quantities are measured quantities of the work identified on the drawings and specifications that can be used to cost the works. Schedules of work are 'without quantities' instructional specifications often produced on smaller projects, or for items such as builders work or fixing schedules.
- Bespoke cladding systems.
- Service diversions.
- Underground drainage.
- Piling and groundworks.
Preliminary contracts might be considered for some of these works to allow them to begin early. Long-lead items such as piling rigs might also be ordered in advance of other works.
Many elements of production information will be produced by suppliers or contractors. The designer should check drawings and specifications provided by suppliers and contractors to ensure they are properly co-ordinated.
Increasingly, software is used to prepare elements of production information, such as; computer aided design (CAD) to prepare drawings, and proprietary systems for the preparation of specifications. The recent emergence of building information modelling (BIM) can allow the automatic generation of production information from a single co-ordinated model, which should result in a reduction in errors and so costs.
NB During this stage, the lead designer should also co-ordinate any outstanding information needed for remaining building regulations or other statutory approvals which must be submitted before works start on site. It is also important to ensure that any necessary party wall notices have been served.
► Next stage:
- Appoint a contractor to construct the home, or;
- Appoint a range of contractors and suppliers to construct the home, or;
- Confirm appointment of the design and build contractor to construct the home, or;
- Confirm appointment of the supplier to fabricate and install the kit house.
Featured articles and news
BSRIA publish mechanical and electrical maintenance customer satisfaction key performance indicators.
Have a look at our article on the history, practice and techniques of placemaking.
Have a look at the key recommendations from ICE's new report on the digital transformation of infrastructure.
The Gate of Europe, the world's first inclining high-rises, with a lean of 15-degrees.
Why engineers need to keep pace with the challenges and opportunities of the digital transformation of the infrastructure sector.
Have a read of our introductory article on fabric structures; their history, properties and characteristics, and more...
Growing connectivity and what it means for physical infrastructure, disruptive new tech and increasing interdependencies.
Foster & Partners selected as architectural team for new bridge crossings in Ipswich.
Could this strange new concept be the future of skyscraper design?
Designing Buildings Wiki attended a RIBA panel debate on one of London's most notorious planning disputes.
Creating an accessible and inclusive environment – CIC publish new guide.
BRE report on the second day of MIPIM 2017.
Read about the 'Exceptional' sustainable design features of the recent winner of the coveted Your BREEAM Award.