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Future Steel Buildings, Business, Page 19

Future Steel Buildings

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Joints in framed tube structures are welded for providing rigidity
and stability. The internal core of the building has concentrated
facilities including elevators and stairs.

The use of a prefabricated framed tube system made construction
more practical and efficient. All welding requirements can be done
in a horizontal position.

The bundled tube was developed by variation in the tubular
structure. It was based on bundling of smaller sized tubes. Each
tube rises to a different height. Tubes can be used to create
different shapes. Triangular and hexagonal shapes have been
used for a few buildings.

For very high buildings super frames and super trussed tubes
have been developed. In super frames, structural efficiency is
obtained from the concentration of material close to the corners.
Super trussed tubes have the advantage that they do not require
closely spaced columns of a framed tube.