A-04 Transport of products to the construction site – screening and simplified LCA
||This aspect is related to the transport of building products from the manufacturer’s production plant (or from regional storage) to the construction site. In practice, the assessment of transportation impact depends on the number of manufacturers or the number of regional storage providing a given building product. Such detailed information may be impossible to obtain without close cooperation with the building industry.Should the transport of products to construction site be included? What could the transportation distance be for each building product? Should losses be allowed for?|
Related study objective
|☒ stand-alone LCA||☒ comparative assertion|
Related study phase
|goal and scope definition||inventory analysis (LCI)||impact assessment (LCIA)||interpretation||reporting|
|new buildings||existing buildings||building products||screening LCA||simplified LCA||complete LCA|
|Provisions||For screening and simplified LCA, transport to the construction site is optional, because of both potentially missing data and minor relevance at the scale of full building LCAs.If data are available, transport of products to the construction site may be included in a screening or simplified LCA unless they fall under the cut-off rules. The practitioner should use average transport distances and load factors. Rules should follow the recommendations of EN 15804. This includes the impacts of the transport and the impacts of any transport-related losses of material and its disposal (i.e. the impact of manufacturing material that is wasted as a result of transport, and the impact of disposing of the waste). Losses should be documented, where they occur.|
188.8.131.52 Boundary of the Transport to and from site (Module A4)
||Modelling of the life cycle stage ‘Transport to the site’ should be iterative, and linked to corresponding cut-off rules defined e.g. in EN 15804/EN 15978.
1) Specific guidance for building LCA studies
2) Specific guidance for product LCA studies
Other studies, e.g. from the UK, have estimated that carbon emissions from freight transport of building products represent at least 5% of the embodied carbon from manufacture. For building LCA (accounting for replacement of building products during the use stage and the end of life), it does not represent more than 5% of the non-renewable primary energy, owing to the higher share of the use phase in building LCAs, based on a French case study [Lasvaux 2010].