|
General comment - Data quality:
Data on energy and raw material consumption in the production of a functional unit of product type have been estimated from data provided by national manufacturers, studies based on real experiences and from the review of specialised literature.
The data on additives have been extracted from the technical data sheets of commercial brands commonly used in the sector, as well as from data provided by national manufacturers of the typical product.
In any case, the data selection and consumption estimations have been carried out seeking the highest representativeness of the chestnut structural sawn timber sector in Spain.
The data used are assumed to be of "Very good" quality level due to their geographical, technical and temporal representativeness for the data collected, because they come from recognised and reliable sources from the study area, as well as the technological processes are referred to the final product.
- Assignment:
The allocation has been carried out following the UNE-EN 15804 standard whenever possible.
The energy consumed by the machinery in the manufacturing process was obtained by means of estimates based on data on power demand, performance and hourly consumption from practical experience with real data, data from manufacturers of the typical product and specialised bibliography.
Likewise, the energy consumption data for the raw material extraction and transport phases have been estimated on the basis of real machinery data obtained from catalogues and specialised bibliography that includes practical case studies.
- Cut-off criteria:
All raw material and energy consumptions have been taken into account except those related to the maintenance of machines and vehicles and the replacement of parts worn out by use.
- Application of a product: Exterior door frame in humid environment and exterior use.
- Reference quantity for the functional unit: 1 m3 of laminated profile of chestnut wood (Castanea sativa Mill.) for door frame use.
- Quantified key properties:
- Use class: 2 (UNE-EN 335).
- Service class: 2 (UNE-EN 1995-1-1 and CTE DB-SEM).
- Minimum performance characteristics to be maintained during the RSL: Resistance class and use and service class.
- RSL >50 years
|
