If wind and earthquake loads are considered then the permissible stre...
When the effect of wind or seismic load is taken into account, the permissible stress in steel is increased by 33⅓ percent. For rivets, bolts, and tension rods, the permissible stresses are increased by 25 percent, when the effect of wind or seismic load is taken into account.
Hence, the correct option is (D)
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If wind and earthquake loads are considered then the permissible stre...
Permissible Stress in Steel Structures with Wind and Earthquake Loads
When designing steel structures, it is important to consider the effects of wind and earthquake loads. These loads can put additional stress on the structure, which can affect the permissible stress in the steel. The permissible stress is the maximum stress that the steel can withstand without experiencing permanent deformation or failure.
Effect of Wind Loads on Permissible Stress in Steel Structures
Wind loads can cause lateral forces on steel structures, which can increase the stress on the steel. As a result, the permissible stress in the steel needs to be increased to compensate for this additional stress.
Effect of Earthquake Loads on Permissible Stress in Steel Structures
Earthquake loads can cause both lateral and vertical forces on steel structures, which can increase the stress on the steel. As a result, the permissible stress in the steel needs to be increased to compensate for this additional stress.
Final Answer
Therefore, when wind and earthquake loads are considered, the permissible stress in steel structures is increased by 33.33%. This increase in permissible stress ensures that the steel structure can withstand the additional stress caused by wind and earthquake loads without experiencing permanent deformation or failure.