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Center of Mass as an Average Point

For the diamo...

Question

For the diamond section, shape factor is 2. The factor of safety in bending is 1.5. If the allowable stress is increased by 25% for wind and earthquake loads, then the load factor is.

2.4

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Solution

The correct option is A 2.4
Factor of safety $= \frac{Yield Stress}{Allowable Stress}$
With increase in allowable stress, the factor of safety will reduce i.e.
Revised $F O S = \frac{1.5}{1.25} = 1.2$
$∴$ Load factor = Revised F.O.S $\times$ Shape factor
$= 1.2 \times 2$
$= 2.4$

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