This study analyzes sustainability based on a function of CO2 emissions
during the construction process. To this end, the values for materialswere
taken fromthe database BEDEC [14]. ApplyingaCO2 emission
to each unit in which the construction is split leads to a comparative
analysis of the alternatives froman environmental point of view. It is assumed
that the steel ismainlymade by the electric arc furnace, approximately
40% fromrecycled scrap steel. The CO2 emissions are defined in
Eq. (4), where ei are the unit emissions (Tables 1 and 2) depending