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General comment General requirements and guidelines concerning the use of generic and specific data and the quality of those are as described in
EN 15804: 2012+A1:2013, clause 6.3.6 and 6.3.7., including ISO14044:2006, 4.2.3.6. The data is representative according to
temporal, geographical and technological requirements. Database used has been ecoinvent v3.6. Calculations have been carried
out using Simapro v9. Upstream steel data from supplier EPDs:
EPD EPD programme Product type Data age
1 IBU Hot-rolled / structural section steel <10 years
2 AENOR Hot-rolled / structural section steel <10 years
3 IBU Hot-rolled / structural section steel <5 years
4 IBU Hot-rolled / structural section steel <5 years
The allocation is made in accordance with the provisions of EN 15804. Production activities, energy, water and waste production inhouse is allocated equally among all products through mass allocation. Effects of primary production of recycled materials allocated
to the main product in which the material was used. The recycling process and transportation of the material is allocated to this
analysis.
All major raw materials and all the essential energy is included. The production process for raw materials and energy flows that are
included with very small amounts (<1% energy, mass, impact) are not included. This cut-off rule does not apply for hazardous
materials and substances.
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