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Q 26. Should the bolts used in my tower be high strength only?

Ans : Strength of a joint is determined not only by the strength of bolts but by the number of bolts also. Whenever a joint is designed with high tensile bolts, designer will reduce quantity of bolts per joint because lesser quantity of high tensile bolts will provide the required strength in the joint. POLY-QUAL prefers the option of using lower strength and larger quantity of bolts on each joint. This is a better option because: a)Kl/r ratio is improved and hence better rigidity is achieved. b)Tightening of bolts up to a predetermined level does not remain important. c) Presence of paint or dust or grease under the bolt surface is not of any consequence. d)Tolerance for misalignment of members is increased.