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Q 23. How does maintenance effect the available strength of tower ?

Ans:Tower is a steel structure. Available structural capacity of tower at any time will be determined by available strength of each member. If members have corroded then obviously the available strength will be reduced to that extent. Looseness of nut bolts also affect the strength of a joint. As a matter of fact, if high grade (8.8 or higher) bolts have been used, then the joint strength depends on amount of tightening also. Hence it is mandatory that maintenance of tower be done as recommended by the manufacturer, if the design strength of tower has to be maintained.