Car roofrack stringer profile is modified in section without loss of material by recessing or forming or changes in structure or wall to reduce airflow noise and impact.

摘要

The roofrack stringer profile is restricted in section (13) without loss of material and by forming or recessing at right angles to the profile length. The profile is made of Al or Al alloy and should be modified in section as described prior to the hardening operation or any surface treatment. The modified area of the profile differs in structure and/or wall thickness from the remainder of the profile.