Civil Engineering MCQJE Level Civil Engineering
A plate of width 150 mm has a bolt hole of diameter 18 mm. If plate thickness is 10 mm, the net area is:
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Choose the correct answer
A
1500 mm²
B
1320 mm²
C
1000 mm²
D
1200 mm²
Correct Answer
B. 1320 mm²
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Net area = (gross width − hole dia) × thickness = (150 − 18) × 10 = 132 × 10 = 1320 mm². Hole size = nominal dia + 2 mm clearance = 16 + 2 = 18 mm for 16 mm bolt. Net area governs rupture check (Tdn = 0.9 An fu/γm1).
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