'Vierendeel truss' differs from regular truss in that its members resist:
Choose the correct answer
Only axial forces (no moments like Pratt/Warren)
Bending + shear + axial — rigid joints, no diagonals; shear transferred by chord/vertical bending (frame action)
Only torsion from eccentric loading
Only prestress from cable system
Correct Answer
B. Bending + shear + axial — rigid joints, no diagonals; shear transferred by chord/vertical bending (frame action)
Why is this the answer?
Vierendeel truss (frame truss): NO diagonals — only top chord, bottom chord, and vertical members with rigid joints. Members carry: bending + shear + axial (NOT axial only like Pratt/Warren trusses). Panel shear transferred by bending of chords and verticals (like a multi-storey frame). Heavier than diagonal trusses for same span. Used when: diagonal members cannot be accommodated (airport concourses, pedestrian bridges needing open web for views, Vierendeel facade).
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