Civil Engineering MCQAE Level Civil Engineering
The plastic section modulus Z_p for a symmetric I-section is used when the section class is:
Steel StructuresBeam DesignMEDIUM
Choose the correct answer
A
Slender
B
Semi-compact
C
Compact or Plastic (for plastic moment M_p = f_y x Z_p)
D
Elastic only
Correct Answer
C. Compact or Plastic (for plastic moment M_p = f_y x Z_p)
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For Plastic and Compact sections (IS 800), design moment capacity = f_y x Z_p / gamma_m0. For Semi-compact: f_y x Z_e / gamma_m0. For Slender: effective section considering local buckling.
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