Precast elements that are placed among the pillars making the enclosure as much perimeter as of demarcation of buildings or promotions. They are composed by central insulation covered with concrete and welded wire mesh, though for regulation of fires they can also be of solid concrete. The standard measurements are 2.40 m and 2.00 m, although they can be made to measure for rounding off the work. They are made of several finishes the most common being smoothly painted. The assembly in pillars is aligned to its face or placing the slab on the outside.