The article will discuss three of the most relevant accidents that occurred in Brazil in the late 60’s and early 70’s, in view of their impacts on the heavy construction industry, repercussion and effects on the lives of professionals who worked as engineers and architects and which culminated in changes to the Brazilian Standard regarding the use of Reinforced Concrete and the
Brazilian Penal Code with regard to Crimes Against Public Safety. They are: the work of architect Oscar Niemeyer and engineer Victor Fadul in 1967 – The Costa e Silva Bridge, also called Oscar Niemeyer Monumental Bridge over Lake Paranoá, in Brasília/DF, executed by the contractor Sobrenco S.A; the Eugène Freyssinet Viaduct, popularly known as Elevado Paulo Frontin, located in Rio de Janeiro/RJ, started its construction in 1969 by the contractor Sobrenco S.A, with engineers Sergio Valle Marques de Souza, Gilson Louro Marchesini, João Carlos Cesar Pinheiro, located at Avenue Paulo Frontin, in Barra da Tijuca, West Zone of Rio de Janeiro, RJ and the Exhibition Pavilion at Gameleira Park in 1971, in Belo Horizonte/MG also
designed by architect Oscar Niemeyer and calculated by engineer Joaquim Cardozo , execution carried out by two contractors, the foundations carried out by SOBRAF and the construction of the Pavilion by SERGEN Engenharia
