There are four general types of bridges that I have not been adding to this website. These are Tee Beams, Plate/Deck Plate/Concrete Through girders, slabs, and stringers. Several factors have lead to this discrimination.
First, many of these bridges were built after 1939, thus they are less than 70 years old.
Second, most of my work has been based in my home state of Kansas. Because of the high number of older designs used in Kansas such as trusses, rainbow arches, and deck arches (stone, closed-spandrel, and open-spandrel), it has been a big time commitment to document and research these bridges which are usually more than 70 years old.
Third, those older designs have been more prone to demolition, so there is generally more time to document tee beams, girders, slabs, and stringers because most of the time they are not in immediate danger.
Fourth, because these four newer designs are still being built, I have generally considered them to actually be common technology.
I made the decision to import this tee beam from the NBI due to its construction date of 1925 which makes it an early example of this technology. Any feedback on this decision would be welcome.