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A truss spar comprises three parts, a short-height, large-diameter cylindrical hull, atop a truss structure, atop tanks for heavy ballast. A cell spar consists of a cluster of small-diameter cylinders and relatively speaking, cheap to manufacture. Cylinders are either buoyancy only, or subdivided into buoyancy and ballast.
A cantilever spar cable-stayed bridge is a modern variation of the cable-stayed bridge.This design has been pioneered by the structural engineer Santiago Calatrava in 1992 with the Puente del Alamillo in Seville, Spain.
The Lun-A (Lunskoye-A) platform, located off the north eastern coast of Sakhalin Island and is a concrete gravity base substructure (CGBS).. An oil platform (also called an oil rig, offshore platform, oil production platform, etc.) is a large structure with facilities to extract and process petroleum and natural gas that lie in rock formations beneath the seabed.
Most trusses have the lower chord under tension and the upper chord under compression. In a cantilever truss the situation is reversed, at least over a portion of the span. The typical cantilever truss bridge is a "balanced cantilever", which enables the construction to proceed outward from a central vertical spar in each direction.
Longerons, struts and stringers in a truss type fuselage structure [2]: 3–4 In an aircraft fuselage, stringers are attached to formers (also called frames) [3] and run in the longitudinal direction of the aircraft. They are primarily responsible for transferring the aerodynamic loads acting on the skin onto the frames and formers.
The Aasta Hansteen platform is a truss spar type allowing condensate to be stored in the hull below sea level and offloaded to a shuttle tanker. The produced gas is exported to the shore with steel catenary risers (SCR). The production risers are also SCRs, with these being the first time SCRs have been used in the Norwegian Sea.
Until 2010 it was the record holder for being located in the deepest water for a production truss spar (this record was broken by Royal Dutch Shell's Perdido platform). It was completed at the end of 2003.
A typical metal spar in a general aviation aircraft usually consists of a sheet aluminium spar web, with L- or T-shaped spar caps being welded or riveted to the top and bottom of the sheet to prevent buckling under applied loads. Larger aircraft using this method of spar construction may have the spar caps sealed to provide integral fuel tanks.