What does it mean to be between architecture and infrastructure? This dissertation seeks to question the limits and find some boundaries between these categories based on project analysis that seem not to belong exclusively to the universe of one or the other. This work will point out the basis on which traditional architecture and infrastructure are defined, in order to, when their edges are established, displacements can be observed. The critical setting lived in 1960 is the scenario which architecture limits seem to become pervasive, not only by the emergence of practices that extend architectures field, but also incorporating the infrastructure in its sphere of work. Part of the projects discussed here take into account the fact that there is a transversality claim in these fields, specifically the one seeking to redefine the ground as architecture. The fact that they were developed by Brazilian architects in the context of the second half of the twentieth century, this is an indication of both, the resonance of this critical discipline review on the national scene, and the effective role of Brazilian architecture in this inflection. Brasilia s central platform (1957-60) by Lucio Costa will be examined thoroughly as it summarises the connection between architecture and infrastructure, being responsible not only for the land drawing operations, where it was implemented but also for the merging of the constructive elements which have overlapped.