The 'transmission line tower' legs are designed as:
Choose the correct answer
Only tension members (hanging from top)
Compression members with buckling check — wind on conductors creates overturning; legs carry compression+bending
Beams with bending only
Torsion members only
Correct Answer
B. Compression members with buckling check — wind on conductors creates overturning; legs carry compression+bending
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Transmission tower legs: axial compression + small bending (self-weight of leg, wind on leg). Main design concern: buckling. Legs usually: single angles or double angles back-to-back. IS 802 (Use of Structural Steel in Overhead Transmission Line Towers) covers design. L-sections with b/t limits for compression. Bracing in body and cross-arm resists horizontal wind loads on conductors.
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