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Old 11-23-2019, 02:23 PM   #31 (permalink)
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Originally Posted by aerohead View Post
Both,longitudinally,and transversely,the unibody would have orders of magnitude larger structural triangulation and stiffness available,compared with a body-on-frame, stamped- steel chassis.And with less mass.The roof apex would act as an integral rollbar,augmenting a-pillars,b-pillars,and c-pillars in tightening,roll-over roof-crush protection standards.I don't know how you could beat it for beaming and torsional rigidity.
You actually want the frame to twist while carrying loads over rough ground. The ladder frame acts as a large torsional spring independent from body and bed.

With a unibody those forces go into the unibody stressing all the spot welds that hold it together. Eventually they fatigue and fail.

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