I'm new to DIY and am building a floating desk made from 40mm thick beech butcher block the type used for kitchen worktops. The desk must be supported entirely from walls made of plaster over lath on 2x4 studs (late 1800's Victorian house).
The dimensions of the worktop are 2460x720x40 and 2300x720x40 in an L shape and the weight will be roughly 40-50kg for each side of the L. It will hold some computer monitors and keyboards but the main weight will be the desk itself.
I've purchased 580mm length Hafele shelf supports similar to these:
http://www.hafele.co.uk/Hafele35a1/...g_id=11588&title=Hebgo+fixed+brackets,+150+kg
A support will be mounted roughly every 30" along the wall.
My question is what is the best way to fix these supports to the wall?
My idea is to mount each support on 200x18mm thick plywood sandwiched between 2mm sheet metal with machine bolts going through the metal and plywood. The plywood and metal sandwich will be fixed to the studs in three or four places vertically with long lag screws.
I will also mount a 2x4 along the length of the desk between each support for added strength.
Does this sound like a reasonable design or will the desk cave in under its own weight possibly taking the wall with it?
I'm a DIY novice.
The dimensions of the worktop are 2460x720x40 and 2300x720x40 in an L shape and the weight will be roughly 40-50kg for each side of the L. It will hold some computer monitors and keyboards but the main weight will be the desk itself.
I've purchased 580mm length Hafele shelf supports similar to these:
http://www.hafele.co.uk/Hafele35a1/...g_id=11588&title=Hebgo+fixed+brackets,+150+kg
A support will be mounted roughly every 30" along the wall.
My question is what is the best way to fix these supports to the wall?
My idea is to mount each support on 200x18mm thick plywood sandwiched between 2mm sheet metal with machine bolts going through the metal and plywood. The plywood and metal sandwich will be fixed to the studs in three or four places vertically with long lag screws.
I will also mount a 2x4 along the length of the desk between each support for added strength.
Does this sound like a reasonable design or will the desk cave in under its own weight possibly taking the wall with it?
I'm a DIY novice.