3.6. Embodied energy in the models proposed Considering that three out of four wall types are masonry-based and the other is a combination of concrete and steel, the energy consumption is the sum of the proportions of the different components for each model. Masonry is an assemblage of masonry units(such as bricks/blocks) and mortar. The individual volumes of these two components will depend mainly on the size of the masonry unit. The energy content of the masonry should include that of the masonry units as well as the mortar. Reinforced concrete used in walls will have a steel/concrete proportion related to the resistance required according to the use to which it is put in the construction.