Originally Posted by Taltruda
You can unflute two ways.. use the flat seamers and just squeeze lightly, don’t flatten it all the way out, or you can also carefully use the fluting plyers backwards and just take out a little of the hump without making it go the wrong way
Thanks, Taltruda, but it currently sits perfectly flat on a truly flat surface, so "unfluting" doesn't appear to be required.
But the top web portions of both the E-903 and E-904 ribs have to be flat enough to be riveted to each other (see page 09-02, Figure 4). This can't happen because the E-904 rib has a longitudinal upward bow that prevents it from laying on the E-903 without rocking around like a cooking pan that rocks on the kitchen counter because it took a 30-year beating from someone with a potato masher.
I need to flatten the web of the rib inward without causing damage. The radius of the flange-to-web bend appears to have been significantly decreased in the process of bending the flanges to establish the required 90-degree angle, resulting in the outward/upward bowing of the rib's web. Maybe use some scrap lumber and a mallet to reshape the web?
There. Might have answered my own question. I'll deal with it tomorrow.
Thanks, again, for your thoughts.