Q:
Which of the following is not true regarding longitudinal stiffeners?
Answer & Explanation
Answer: 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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