Type of structure

Design working life

Structures of a temporary nature

Between 3 and 10 years

Replaceable elements not forming part of the main structure (for example, handrails, pipe supports)

Between 10 and 25 years

Agricultural or industrial buildings (or installations) and maritime works

Between 15 and 50 years

Housing or office buildings, bridges or crossings of a total length of less than 10 metres and civil engineering structures (except maritime works) having a low or average economic repercussion

50 years

Buildings of a monumental nature or having a special importance

100 years

Bridges of a total length equal to or greater than 10 metres and other civil engineering structures having a high economic repercussion

100 years