CHAPTER X.

117. The Arched Rib, of both Steel and Masonry 142 118. Arched Rib with Ends Fixed 144 119. Arched Rib with Ends Jointed 144 120. Arched Rib with Crown and Ends Jointed 145 121. Relative Stiffness of Arched Ribs 145 122. General Conditions of Analysis of Arched Ribs 146

123. Beams of Combined Steel and Concrete 149