Aluminum Geodesic Dome Roof
Ageodesic dome is a hemispherical thin-shell structure (latticeshell) based on a geodesic polyhedron. The triangular elements of the dome are structurally rigid and distribute the structural stress throughout the structure, making geodesic domes able to
withstand very heavy loads for their size. The installation of dome is with quad pods and chain pulley, aluminum’s lightweight characteristics allows for larger clear-span cover capability than structures utilizing steel, concrete and other materials.
Internal Floating Roof Tank
Nternal Floating Roof Tank has both, a permanent fixed roof and a floating roof inside. There are two basic types of internal floating roof tanks: tanks in which the fixed roof is supported by vertical columns within the tank and the tanks with a self-supporting fixed roof and no internal support columns Tanks initially constructed with both a fixed roof and an internal floating roof may be of either type. An internal floating roof tank has both a permanently affixed roof and a roof that floats inside the tank on the liquid surface (contact deck) or is supported on pontoons several inches above the liquid surface (noncontact deck). The internal floating roof rises and falls with the liquid level
External Floating Roof Tank
A typical external floating roof tank consists of an opentopped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid, rising and falling with the liquid level. The floating roof is comprised of a deck, fittings, and rim seal system. Floating roof decks are constructed of welded steel plates and are of three general types: pan, pontoon, and double deck. The liquid surface is covered by the floating deck, except in the small annular space between the deck and the shell; the deck may contact the liquid or float directly above the surface on pontoons. External floating roof tanks are equipped with a rim seal system, which is attached to the roof perimeter and contacts the tank wall. The rim seal system slides against the tank wall as the roof is raised and lowered. The floating deck is also equipped with fittings that penetrate the deck and serve operational functions. The external floating roof design is such that evaporative losses from the stored liquid are limited to losses from the rim seal system and deck fittings (standing storage loss) and any exposed liquid on the tank walls (withdrawal loss).
