I want to make a wide table. For this purpose I bought a larch tabletop with dimensions: 40 x 800 x 2000 millimetres (1.6" x 31.5" x 78.7"). This tabletop according to my computations is about 50kg (110 lb) based on information I found that larch is about 700kg per 1m3.
Previously I thought about buying some height-adjustable legs from Ikea and mounting them simply with screws. But recently I thought that for such a heavy tabletop it wouldn't be enough.
So I searched online for some time and came up with this custom leg scheme (this is 1 pair of legs):
So the basic idea is to have 2 pairs of these leg assemblies and cut 4 corners from the tabletop for legs to fill them in. What I am not sure about is what dimensions for A, B, C, E should I use for whole construction to be sturdy (taking in account, that there will be weights on the table, ideally I want be comfortable with 2 80kg person sitting on the table).
Also, I have some concerns about wiggles along the wide side. Maybe I should add some connection between the assemblies (along the wide side), though not in this solution because it will take place under the table or require extra work to make panels embedded into wooden tabletop.
So can I use legs like this for such a tabletop?