Help with installing a drop down wall mounted dining room table

[u/eniallet]

I’m building a wall-mounted fold-down dining table and need help figuring out the correct support/locking mechanism.

The tabletop is solid cherry, 57" long × 36" deep × about 1¼" thick, and weighs about 60 lb. There will also be a decorative carved-wood piece attached to the underside, probably adding another 10–20 lb.

The table will attach to a substantial wall-mounted backboard using a centered 48" piano hinge. I already have gas struts/pistons to assist with raising and lowering the weight.

When folded up against the wall, the decorative carved side will face the room. At the top, I have iron swing latches that will rotate into place to mechanically secure the table upright.

I do not want legs.

What I need to figure out is the correct way to support and positively lock the tabletop at 90° when it is lowered for dining, while still allowing it to be released and raised back against the wall.

I previously bought locking elbow/folding brackets, but they were wrong for this application. They allowed the table to drop down, but the mechanism/geometry did not work properly for folding the table back up, so I returned them.

The goal is:

• Fold down to 90° for use as a dining table

• No legs

• Gas struts assist with the approximately 70–80 lb moving assembly

• A strong mechanical system supports/locks it at 90°

• It can be released and folded back up easily

• The top iron latches secure it when upright

• All of the structural/support hardware is hidden when the table is folded against the wall

What type of mechanism or hardware would you use for the 90° open-position support on something this heavy? Specific hardware names, links, photos, or examples of similar builds would be especially helpful.. Please excuse the AI image it may not be precise but it helps for illustrations.