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Building Construction 1

It has these negative characteristics:

• It is not highly fireproof, as it is made of wood.
• It is not strong enough to resist major wind events such as tornadoes

and hurricanes.

6- Pre Engineering Building Structure:

Pre engineered buildings are factory-built buildings of steel that are shipped
to site and bolted together. What distinguishes them from other buildings is
that the contractor also designs the building - a practice called design & build.
This style of construction is ideally suited to industrial buildings and
warehouses; it is cheap, very fast to erect, and can also be dismantled and
moved to another site - more on that later. These structures are sometimes
called 'metal boxes' or 'tin sheds' by laymen - they are essentially rectangular
boxes enclosed in a skin of corrugated metal sheeting.

Great speed is achieved because while the foundations and floor slab are being
constructed, the beams and columns - the structural system - are being
fabricated in the factory. Once the foundations and floor are done, the columns
are shipped to the site, lifted into place by cranes, and bolted together.

7- Truss:

A truss is an assembly of beams or other elements that creates a rigid structure.
It is a structure that "consists of two-force members only, where the members
are organized so that the assemblage as a whole behaves as a single object". A
"two-force member" is a structural component where force is applied to only
two points. Although this rigorous definition allows the members to have any
shape connected in any stable configuration, trusses typically comprise five or
more triangular units constructed with straight members whose ends are
connected at joints referred to as nodes. A planar truss is one where all
members and nodes lie within a two-dimensional plane, while a space truss
has members and nodes that extend into three dimensions.

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Dr. Sherein El-Shahat