The objective of this dissertation is to develop a facility location model as applied to specialized terminals in Brazilian seaports. The dissertation starts with the logistics platform concept, a macro business-oriented logistics units next to seaports that operate adding value service to products to reach specialized terminals, which are in turn a micro business-orientated logistics unit specialized in specific supply chains. The model was based on some combination of transshipment model and multicommodity, multi-facility and capacitated location model. Specifically, the objective is to apply the proposed model to a supply chain in the Brazilian agribusiness which uses seaport logistics platforms or specialized terminals as a transshipment area, allowing the application of added value services. The research universe includes the volume of exported soy beans, soy meal and oil from Brazil in 2004. The data include six points of origins in Brazil, six transshipment ports, and three world destination seaports. Results extending from Z (minus or equal) 6 to Z = 1 specialized terminals are presented. Some results, allocation flow and sensibility analysis by price, investments, cost and capacity are also presented. Some relevant factors which might pose difficulties to the location of the platforms are also discussed. Finally, some conclusions, limitations and recommendations for further work are also presented.