Cable-stayed bridge are as follows: There are four major classes of rigging on cable-stayed bridges: "mono", "harp", "fan," and "star". There are also four arrangements for support columns: "single", "double", "portal" and "A-shaped". Depending on the design, the columns may be vertical or angled or curved relative to the bridge deck. A side-spar cable-stayed bridge uses a central tower supported only on one side. This design allows the construction of a curved bridge. Far more radical in its structure, the Puente del Alamillo (1992) uses a single cantilever spar on one side of the span, with cables on one side only to
GSL-class berthing pontoon intended for berthing vessels having displacement up to 40,000 tons on a jetty by serving as spacers between the jetty and the ship. They were built as part of an order to also construct one Service Barge Pontoon and four gangways. The request for proposal was issued on 7 March 2011 and the contract was signed on June 2011. By February 2013 all four pontoons had been delivered. Two pontoons were stationed at Naval Dockyard, Mumbai and two at the Naval Base in Karwar. GSL service barge pontoon GSL-class berthing pontoon The GSL class of jetty berthing pontoons are a