a) 300 mm2 to 750 mm2
b) 3000 mm2 to 7500 mm2
c) 3 m2 to 75 m2
d) 3 mm2 to 75 mm2
Answer: b
Explanation: In method of loading comma the size of square steel plate generally variance from 3000 mm2 to 7500 mm2. The plates should have sufficient thickness to with stand the maximum bending stresses due to probable loading. But in no case, it should be less than 25 mm.
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