984 MODERN STEAM PRACTICE . the outside , to form an air space so as to admit of a current of air passing between the two coverings , keeping the inside of the build - ing comparatively cool . … The next example of an arch truss , of 187 feet clear span , the outside radius of the main rib being 108 feet 4 inches , is for the roof of the city terminus of the South - Eastern Railway in Cannon Street , London ( Figs . 688 - 693 ) . The depth of the truss at the centre is about one - seventh…
e-rara · Eisenbibliothek Schlatt · No known copyright restrictions. Free to use for anything.
