Quote:
Originally Posted by ericr
I know you have explained these concepts repeatedly on the Barn and I am sure you are correct; but for present purposes can you briefly explain how these concepts are reconciled with the warnings we see in the
Bulletins that chassis parts should be straightened while cold, not heated,,,,
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I would not use heat if I did not have to.
The frame was pressed cold back in 1928, the metal deforming process in pressing gives it some of strength also in the right angle bends along with its upper and lower chords.
It has taken 85 years of pounding to make it sag 1/4 inch, and most likely half of this was on dirt potholed roads in its early life.
To heat it unnecessarily in my opinion would weaken it at the point of heat, not restore it to a uniform original strength.