Abstract: A pollutant collection and exhaust system is provided in a battery of coke ovens for removal of atmospheric pollutants from the gases released at the time of discharge of coke from an oven. A coke guide carriage is provided with an exhaust hood which encloses the coke guide and extends over the transfer car thereby enshrouding the discharging coke and resulting fumes and smoke during the discharge operation. The exhaust hood is movable along the length of the oven battery. A stationary exhaust manifold extends along the battery in spaced relation above the oven exhaust hood. The exhaust hood is equipped with connecting means which are adapted to register in coplanar sealing engagement with selected gated openings in the manifold while simultaneously opening the selected gates. Pollutants are exhausted from the discharge site and conducted through the manifold and associated treating apparatus with draft induced by an exhaust means connected to the manifold and treating apparatus.

Abstract: A torsion resistant girder for supporting a crane rail in which the rail is supported on the top chord and the web of the girder includes an upper marginal portion formed integrally with the top chord by rolling or extrusion and the remainder of the web is a thinner plate welded at its upper edge to the depending free edge of the portion of the web plate formed integrally with the top chord member. This construction is designed to prevent failure of the girder along the line of junction between the web and the top chord. The web stiffening plates of the girder include wing plates connected to the outer free edges of the web stiffening plates and to the top chord. The wing plates and the upper portion of the web plate stiffening plates may be formed integrally by rolling or extrusion.