Over the years, CENTUNION has developed its own technology for the construction of modular permanent steel bridges. These bridges have the advantage of an easy implementation at site, especially in remote areas where the transport of heavy materials is complicated and expensive. For the design of modular bridges, different structural typologies have been used depending on the span of the bridge:​

Steel Truss Bridges: : Modular steel truss bridges are used for spans ranging from 40 to 120 meter, being especially competitive in simply supported bridges. The use of trusses for the main beams allows the structural elements not to have a large size, greatly facilitating their transport to the site as well as their hoisting during assembly. This makes design particularly important, a task in which CENTUNION stands out due to its extensive experience in this type of bridges, both at rural and urban levels, having installed more than 25,000 linear meters in different countries of Southeast Asia and Africa, designing and adapting to each specific location.

Multi-girder Bridges: : For bridges with spans of less than 40 meters, CENTUNION has developed a modular system of bi-girder or multi-girder bridges (depending on the required width), being able to combine different bridge typologies, as mixed bridge or steel deck bridges, through modular panels.