![[Floor System, Walnut Lane Bridge]](/images/floor_system_walnut_lane_bridge_asce_452_small.jpg "Floor System, Walnut Lane Bridge")
Description: Floor System, Walnut Lane Bridge.
Source: George S. Webster and Henry H. Quimby, "Walnut Lane Bridge, Philadelphia" (Transactions of the American Society of Civil Engineers, December 1909, vol. LXV, page 452).
Description: Floor System, Walnut Lane Bridge.
Source: George S. Webster and Henry H. Quimby, "Walnut Lane Bridge, Philadelphia" (Transactions of the American Society of Civil Engineers, December 1909, vol. LXV, page 452).