got a beutiful oak bed for free. It was used by overweight people

Nothing. Screws aren't proper joinery and the fatsos reamed out the threads most likely. Rebuild it with proper wood joinery and it'll support you and fat albert.

File: index0.jpg (5KB, 180x180px) Image search: [Google]

5KB, 180x180px

>>1136238

I'm going to assume the mattress is suspended on slats.

what I would try :

- replace the 3 beams holding up the slats with something wider (screw and glue). If not possible strengthen them.

- replace the slats.

- If they aren't already, glue all connections between boards on the head/back end.

- I assume the head/back are connected to the sides and centre beam with brackets, they might allow some movement. Try replacing them.

If all else fails, something like this can take a lot of weight off the wooden frame :

https://www.thesleepshop.com/store/pc/Lazarbeam-Bed-Support-King-Size-6p1070.htm

Oil the joints. No friction, no creaking.

>>1136266
what's that connector called? can you buy them?

>>1136284

Use image search.

Those specifically are Rockler 5'' Surface Mounted Bed Rail Brackets. If you search for bed brackets you will find many similar ones though.

>>1136238
try Simpson connectors at the lumber or hardware sections of the hardware stores

>>1136273
or use wax