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EEJ MAIN Aptitude QUESTION #10978
Question 1
A space frame is used in large-span roof structures because it:
  • Is cheaper than conventional beams
  • Distributes loads three-dimensionally through a network of members in tension and compression✔️
  • Only works in compression like a flat slab
  • Requires no supports at intermediate points
Correct Answer Explanation

A space frame (3D truss) works by:

  • Distributing loads along multiple paths simultaneously (three-dimensional load distribution).
  • Individual members carry only axial forces (tension or compression) — no bending.
  • This allows very long spans with relatively little material — extremely efficient structure.
  • Applications: airport terminals, sports stadiums, exhibition halls, industrial sheds.

Famous examples: Indira Gandhi Indoor Stadium (New Delhi), many airport terminal roofs worldwide.