The mechanics principle of steel construction
The portal steel frame's main loading structure is crosswise rigid frame consisting of column and beam. The rigid frame is the plane load-bearing system. In order to ensure the longitudinal stability, the column bracing and roof support are set.
The rigid frame and beam adopt the H shape steel. Various load is passed to the base through column and beam.
Support and tie bar
The steel support adopts hot rolled section steel, generally steel angle. Resilient mounting adopts the steel rod. The tie bar is pressed circular steel tube, which forms the stress closed system with the support.
Purline and wall beam
They are generally the C shape steel and Z shape steel. They bear the loading from the roof boarding and shingle and pass the loading to the column and beam.
The basic forms of portal steel frame
a. typical portal steel frame
b. portal steel frame with crane
c. portal steel frame with partial layer 2




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