PRATT (SMALL, 3-PANEL) PONY TRUSS
1904 Garfield 24E0540N2960005
1912 Garfield 24E0300N2800004 Monarch Engineering
c1915 Pittsburg 61E1490N4080004 Toledo Massillon Br.
One type that appeared in Oklahoma in span lengths generally under 50-foot was a parallel chord Pratt pony with a single main panel (the section between vertical posts) that gives the appearance of a queen-post. As a Pratt, however, it has diagonal tension members. Strictly utilitarian and lightly made for cost-saving, this type was purchased by Oklahoma counties prior to the First World War. In 1912 the Monarch Engineering Company of Falls City, Nebraska, supplied a pin-connected, 49-foot span (Figure 43) for use over creek in Garfield County near the community of Hillsdale.
Figure 43. Bridge 24E0300N2800004, though it resembles a queen post truss, is a small Pratt dating from before the First World War.