be part of a concrete truss fig1 depicts a rectangular segment of reinforced steel concrete that has reinforced steel without being prestressed in the interior fig2 depicts a rectangular segment of reinforced concrete that has prestressed steel 76 in the interior fig2 illustrates a rectangular segment of concrete that contain a plurality of ducts 77 that allow the placement of steel inside the interior of the segment of concrete so that after the steel has been forged and the concrete has the designed strength the steel 78 can be post tensioned while these examples show a concrete truss used in combination with a particular type of steel it is also contemplated that various types of steel be used with a concrete truss in a single application and therefore such combination also falls within the scope of the present invention referring now to the fig2 23 24 25 26 27 and 28 these illustrate various alternative embodiments of the different types of sections that can be manufactured using of reinforced concrete that are part of the concrete truss for example the section of a segment can be rectangular as shown in fig2 or oval or circular as in fig2 the segments can also be configured in a t as in fig2 in an i aashto as in fig2 in an l shape as in fig2 in a u as in fig2 or in a closed channel.