Hi guys,
We have designed our head restraint mounting bar such that it is a bended tube.
The rule T3.5.5 says that If a bent tube(or member consisting of multiple tubes that are not in a line) is used anywhere in the primary structure, other than the front and main roll hoops, an additional tube must be attached to support it. The attachment point must be the position along the tube where it deviates farthest from a straight line connecting both ends.The support tube must have the same diameter and thickness as the bent tube, terminate at a node of the chassis, and be angled no more than 45 degrees from the plane of the bent tube.
I have a doubt that does head restraint mounting bar comes in primary structure and needed to satisfy this rule (provide support member at 45 degree to a node at chassis). Also in T5.6.3 its not mentioned to provide a support to the mounting bar (only force of 890N is mentioned). Is this design okay?
Apoorv,
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