The truss is related to the Pengram. It consists of sloping struts like a Howe truss, and sloping tension rods like a Pratt truss with a polygonal top chord. It seems these were built only by the Indiana Bridge Company of of Muncie, Indiana.
Peterson Ford Bridge
(Delaware County, Indiana)Built 1902; rehabilitated 1985IBCo. High-Triangular through truss bridge over Mississinewa River on CR 850 North
Seven Mile Road Bridge
(Preble County, Ohio)Built 1906 by the Indiana Bridge Co. of Muncie, In., Restored 2014-15Polygonal Warren through truss bridge over Seven Mile Creek on TR 331Restored and open to traffic