Have you considered a half inch angel along the back with the piano hinge on the top? That would give you the room for the wood and have the hinge at the top of the wood.
Have you considered suspending your longer lengths of steel and aluminum under the bottom pallet rack level and above your machines etc. Say just 6" at the most to get it off the floor and not blocking pallets if you can afford that amount of headroom loss.
Found this from Stanley who owns heli-coil brand.
https://www.stanleyengineeredfastening.com/-/media/Web/SEF/Resources/Docs/Heli-Coil/Tensile_Strength_HC68-2_rev4.pdf
My thoughts on the ability of the helicoil to sustain the torque stretch of the bolt. The engagement surface area of the helicoil to crankshaft shaft threads is greater than the engagement of the bolt to helicoil by a small amount. If the bolt steel is the same or less in strength to the...
I can't remember who's thread I saw it on, but using 2 2x4 spacers attached either side perpendicular to and halfway up the rafter portions of the truss. Size the spacer length for the spacing between trusses and attach blocks to the header to keep the truss within a few inches of home on the...
That is just a high temp mechanical lock nut. The top of the nut is swagged down after the slots are cut to cause an interference or squeezing of the shaft as the nut is installed to lock it from coming undone. It should just undo like any nut with a slight drag torque due to the locking...