It is an office building consisting of two towers, located on the corner of Reyes Ortiz and Federico Zuazo streets in the city of La Paz - Bolivia.

The “West Tower” is one of the tallest buildings in Bolivia since it is 104 meters high and has a high seismic resistance capacity. It should be noted that to date the towers have already withstood two major earthquakes for the city of La Paz, without showing any crack.

One of its main structural features is that it has a concrete shell at the entrance (similar in span to the shells of St. Michael the Archangel Church, but much lower in height, making it structurally more challenging). The principle of a shell is that it is a continuous curved structure with very small thickness, which is supported by its geometry rather than by the strength of the material from which it is constructed.

The geometry of the building shell is generated with a succession of funicular polygons in catenary. This is why it could be built with a thickness of only 6 centimeters using concrete with a characteristic strength of 15 MPa.

Another interesting feature is that the glass skin of the shell is a structure that is supported by the strength of the glass used as a structural element.

The project consists of two towers with a total built area of 28,700 square meters. The “East Tower” has 17 floors of 550 square meters, and the “West Tower” has 32 floors of 400 square meters, the mezzanine and basements have an area of 1800 square meters each.

Our work consisted of the structural calculation and design, as well as the supervision of the rough work.