N of exchangers of the integrated system of mass transit construction Megab s. Work in partnership with the city of Medell n. Estyma Enterprise Consisting of the systems? n of the sector at the height of the Guadalupe Zapata Park, located between carreras 25 to 26 Bis and the streets 70Bis 73 in the Cuba citadel in the city of Pereira. Reinforced concrete structures were developed for buildings and bridges, such as: Plaza c vica, alley access, building and premises exchanger, platforms of Exchange (stairs, ramps, bridges) complementary and pedestrian bridge. Excavaci n 139.002 mm, hydraulic concrete pavement mechanics hydraulic 18.847 m, steel reinforcing 1.287. 331 kg, retaining wall n anchored 1,005 m, post-tensioned 1,052 m, administration building beams 1.111 m, cobbled 12.707 m, bridge and pedestrian ramp 1,361 m square. Total involved 38.556 m.