Trough Flooring or Decking for Bridges, Piers, Subways, Culverts, Buildings, and the like.

摘要

25,575. Rammage, A. W. Nov. 8. Metal floors. -Trough flooring or decking consists of similar corrugated plates having two or more corrugations and one flange a4 bent inwards and the opposite flange a5 bent first downwards and then upwards parallel to the flange a4, so that riveting can be performed wholly from above. The face a2 may be concave instead of flat, and the flanges a4, a5 may be vertical..