Autocad design; of a single-family building with a mixed system; from fc = 210kg-cm2; fm = 65kg-cm2; with portland cement plus type i; overloads applied for stairs and passageways of 200kg-m2; 100kg-m2 roof; fy steel = 4200kg-cm2; gr 60 astm 615. structural system on the y-axis and special moment-resistant frames; and in the yy direction of confined masonry.