The LCA's also absorb braking forces via the strut rods that are increased with larger brakes and stickier tires. If you are building your car for handling, I can see doing this. If you are not, I wouldn't bother.

go back and look at the initial video that was posted,
there you will see what holds the two halfs of the LCA together.
The 1/8 thick plate of steel, that is added (if it is that much) would not do much to
affect compression or stretching, but allows one to align the two halfs to minimize
the play around the torsion bar mount and to certainly allow the two half to stay
where they were set and not pry open from the bottom side or from around the torsion bar mount.
Again, strengthening the LCA adds robustness, for those that run sticky tires, large sway bars
and expect to explore some limits of cornering. No one said that you need to do it.

You have not made the case IMO that: containing the halves with a gusset is necessary or needed in real world application. I get that it might make something more robust, but applies to almost anything added to a loaded item, nor that sticky tires or whatever is justification

This would be very similar to welding up a K frame
and reinforcing the steering box mount. Another item that for me checks all three of the boxes
1) it is affordable ,, yes check
2) it is with the realm of something I can do ,, yes check
3) directionally it is the right thing to do,, yes check

Except no case has been made the benefits are the same



and my comment concerning the general strength of A body structure and component robustness
as designed is valid.
Designs for families of components, designed about the same point in time to be used in the same family
(the uni body chassis is the 'family' in this discussion) will be subject to the same general loading and durability requirements
that were written when the design was developed - tested - released for production.

if some individual component ends up being really strong when compared to the other parts that surround it, that is possible only because
1) the part is a shared design with something that needs higher strength, and there is some savings available due to volume production to share the design across platforms,
2) a mistake was made in the design review process and a potential cost savings opportunity to take money out was missed

and your 1/4 inch vs 1/2 ratchet is a perfect analogy, assuming the 1/2 inch ratchet has a longer lever, the 1/2 inch ratchet adds robustness and allows the proper torque to be attained
with less effort. Assuming that more torque is needed,, ie sticker tires, larger torsion bars, super shocks,,,, the 1/4 ratchet would no longer be appropriate and the additional robustness
as provided by the 1/2 ratchet would be needed.

Most would assume a 1/2" ratchet has a longer lever arm. I am unclear how its thought or why its a desired goal to be easier using a long 1/2" ratchet to tighten a rather torque limited 1/4" bolt, which was the point of my analogy. Still don't understand the significant of stickier tires, etc. nobody is breaking LCA with 10 TW trtires i am am aware of.

As written your analogy only makes sense as a counter point if you had used the word 'socket', as a 1/2 in drive socket adds nothing to the process that a 1/4 inch socket would provide if standard 1/4 drive torque is the goal.
If more than 1/4inch drive torque is desired, the use of a 3/8 inch drive socket would be recommended or 1/2 if the torque level requires it

Well we still disagree, my analogy is only logical to me if talking about a bolt much smaller then any larger ratchet needed to supply the necessary torque, kinda like the LCA always is more robust then any TB conceptt..

real world application.

https://www.speedwaymotors.com/QA1-52307-Tubular-Control-Arm-Front-Lower-Mopar-A-Body,258467.html?sku=72152307&utm_medium=CSEGoogle&utm_source=CSE&utm_campaign=CSEGOOGLE&gclid=EAIaIQobChMImeLd56Hf4QIVB0sNCh2qiwpqEAQYAiABEgJmuPD_BwE

Lower arms. I would not buy these however.

Greg

weighs more

If you've never done it, you'll never know.

The original title is , both of which it does.

Hmmmm, after reading 3 pages of the dink pulling contest I seem to get that the idea is if you want to box your control arms go ahead and do it. It may or may not help anything, but it won't hurt it either........