O Scale, 1:48, 1/4 inch scale Riveted Girder. Approx. 15 scale inches (0.313 actual inches) square. Simulates a fabricated, riveted girder made up of web, flanges and reinforcing angle in the corners. Distinctive double-rows of rivets on the flanges. 1360 rivets in this girder! 9 inches of girder that you cut to the length that you need.