The furnace is lined with a silicious material.Īcid Open-hearth Steel: A metal formed of pig iron, cast iron, and wrought iron or steel scrap, which is converted into steel by the direct action of an oxidizing flame in a regenerative gas furnace. Just before tapping, spiegeleisen or an artificial ferromanganese is added to the charge in order to destroy the oxide slag and prevent red shortness. The lining of the converter is of a silicious material that will have no effect on the phosphorus, hence that element is not eliminated.Īcid Open-hearth Furnace: A furnace used in the manufacture of Acid Open-hearth Steel.Īcid Open-hearth Process: That process of producing steel from pig and scrap iron, in which the first step is to remove most of the silicon, manganese, and carbon from the molten mass. In contra-distinction to a lap-joint where the splice is shingled.Īcceleration: The increase, in velocity which takes place in a unit of time.Īcid Bessemer Steel: A metal produced by the decarburization of crude pig iron in a converter where finely divided air currents are blown through the molten mass.

A structure sustaining one end of a bridge span and at the same time supporting the embankment which carries the track or roadway.Ībutment Line: The closing line of an equilibrium polygon.Ībutment Wall: A wall in an abutment, or a wall serving the purpose of an abutment.Ībutting Joint: A square joint confined to a single plane where the parts meet.

22dd.Ībacus: The upper member of the capital of a column.Ībscissa: A term in rectangular coordinates referring to the horizontal distance of any point from the vertical axis.Ībutment: That part of a pier from which an arch springs. Glossary of bridge terminology-A University of Iowa LibrariesĪ-Truss: A four-panel truss having extended batter posts intersecting over the centre resembling somewhat the letter A.

Architect definition bridges