Description: Both Ribs, After Removal of Centering.
Source: George S. Webster and Henry H. Quimby, "Walnut Lane Bridge, Philadelphia" (Transactions of the American Society of Civil Engineers, December 1909, vol. LXV, Plate XXVI, opposite page 454).
Description: Both Ribs, After Removal of Centering.
Source: George S. Webster and Henry H. Quimby, "Walnut Lane Bridge, Philadelphia" (Transactions of the American Society of Civil Engineers, December 1909, vol. LXV, Plate XXVI, opposite page 454).