I have an I-beam left over from a residential construction project that is in my driveway. There is also a small plate with four bolt holes (5 inches X 10 inches) and a long plate (11 feet X 9 inches). The I-beam dimensions are (23 feet in Length X 8.5 inches Section Height, with 5.25 inch Flange width) holes every 12 inches; 3/8 inch thickness.