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Advantage and Disadvantage of Steel Structures

Steel Structures have following advantage and disadvantages:

Advantages:

  1. Better quality control.
  2. Lighter structural elements.
  3. Faster to erect.
  4. Less percentage of floor area occupied.
  5. Better ductility, hence better earthquake resistance.
  6. Less material handling at site.
  7. Amenable to alteration.

Disadvantages:

  1. Skilled labor required.
  2. Higher cost of construction.
  3. High maintenance cost.
  4. Poor fire resistance as at 1000° F (538°C), 65 % strength remains and at 1600° F (871°C), 15 % of strength remains.

Mechanical Properties of Steel:

  1. Yield stress: 220-540 N/mm²
  2. Ultimate tensile stress: 1.2 x yield stress.
  3. Modulus of Elasticity: 2 x 105  N/mm²
  4. Poisson's ration: 0.3-0.5

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