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Consider the following statements with respect to plate girders and identify the correct answer.
Statement A: The intermediate transverse stiffener increases the buckling resistance of the web caused by shear.
Statement B: When the computed shear stress in the web of a plate girder is less than the critical shear stress, intermediate stiffeners are theoretically not required.
Correct Answer: B — Both statements are correct.
Explanation:
Explanation: Intermediate stiffeners: These are also called stability stiffeners and are provided to check the diagonal buckling of the web. Depending upon the requirements vertical (transverse) and horizontal (longitudinal) stiffeners may be provided. Theoretically, intermediate transverse stiffeners are not required when the calculated shear stress in the web is less than the critical shear stress of the web of the plate girder since the web will not buckle and failure of the web will occur due to shear yielding of the web.