Cable-stayed bridge 3-span cable-stayed bridge, the loads from the main spans are normally anchored back near the end abutments by stays in the end spans. For more spans, this is not the case and the bridge structure is less stiff overall. This can create difficulties in both the design of the deck and the pylons. Examples of multiple-span structures in which this is the case include Ting Kau Bridge, where additional 'cross-bracing' stays are used to stabilise the pylons; Millau Viaduct and Mezcala Bridge, where twin-legged towers are used; and General Rafael Urdaneta Bridge, where very stiff multi-legged frame towers were adopted.
GSL-class service barge pontoon GSL-class service barge pontoon A GSL service barge pontoon is a non self-propelled yardcraft built by Goa Shipyard Limited for the Indian Navy. The pontoon is a catamaran having rectangular shaped, flat-bottomed hulls. The hulls are connected by trusses of round pipes and steel deck transverse beams. Each hull is divided into eight watertight compartments. The pontoon have cylindrical rubber fenders of 600 mm O.D. installed on both sides to absorb impacts and low reaction loads. Structural provisions have been made for vertical roller fenders at the forward and aft corners on the side facing the ship. The fenders are