Which of the following is not true regarding longitudinal stiffeners?(a) longitudinal stiffeners increase buckling resistance considerably as compared to transverse stiffeners(b) they consist of plane section for welded plate girder(c) first horizontal stiffener is provide at one-fifth of distance from compression flange(d) first horizontal stiffener is provide at neutral axisThe question was posed to me during an interview.I need to ask this question from Stiffeners topic in section Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures

Which of the following is not true regarding longitudinal stiffeners?(

1.	Which of the following is not true regarding longitudinal stiffeners?(a) longitudinal stiffeners increase buckling resistance considerably as compared to transverse stiffeners(b) they consist of plane section for welded plate girder(c) first horizontal stiffener is provide at one-fifth of distance from compression flange(d) first horizontal stiffener is provide at neutral axisThe question was posed to me during an interview.I need to ask this question from Stiffeners topic in section Gantry Girders, Design of Plate Girders & Industrial Buildings of Design of Steel Structures
Answer» The correct option is (d) first HORIZONTAL stiffener is provide at neutral axis Explanation: Longitudinal STIFFENERS are also called horizontal stiffeners. They increase buckling resistance considerably as compared to transverse stiffeners when the web is subjected to buckling. They consist of angle section for riveted/bolted plate girder and PLANE section for WELDED plate girder and are provided in the compression zone of the web. The first horizontal stiffener is provide at one-fifth of distance from compression flange to tension flange. If required ANOTHER stiffener is provided at the neutral axis.

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