Suspension bridge major wire-cable suspension bridge was the in Philadelphia, Pennsylvania. Designed by Charles Ellet, Jr. and completed in 1842, it had a span of 109 m. Ellet's Niagara Falls Suspension Bridge (1847–48) was abandoned before completion. It was used as scaffolding for John A. Roebling's double decker railroad and carriage bridge (1855). The Otto Beit Bridge (1938–39) was the first modern suspension bridge outside the United States built with parallel wire cables. The main forces in a suspension bridge of any type are tension in the cables and compression in the pillars. Since almost all the force on the pillars is
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