Help me stop my desk from going saggy

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A few dome-head screws and 25mm outer diameter washers from Screwfix. One in every third slot.

It's holding up well, incredibly sturdy - can't see it going anywhere soon :)

Here's what I went with:
Thank you for the detailed response! Did you get the 41 x 41 x 2.5mm or the 41 x 21 x 2.5mm? Not sure if the 41 x 41 x 2.5 will be enough to tuck some cables inside. I'm thinking of getting 3 x 1.5m having them equally distributed from the middle to the back of the worktop. Originally, I was looking for slotted angle iron, however I cannot believe how expensive they are in comparison to the prices in the US!
 
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Thank you for the detailed response! Did you get the 41 x 41 x 2.5mm or the 41 x 21 x 2.5mm? Not sure if the 41 x 41 x 2.5 will be enough to tuck some cables inside. I'm thinking of getting 3 x 1.5m having them equally distributed from the middle to the back of the worktop. Originally, I was looking for slotted angle iron, however I cannot believe how expensive they are in comparison to the prices in the US!

41x21 - otherwise my knees would likely have knocked it

In all honesty, I don't think you'll need 3x1.5m - it's really heavy duty steel :)
 
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41x21 - otherwise my knees would likely have knocked it

In all honesty, I don't think you'll need 3x1.5m - it's really heavy duty steel :)
I prefer to do a "overkill" and not worry in the future, the £ difference is not big. Thank you once again for your response, I know it's an old thread! :)
 
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Don't worry about it sagging. With a laminated wood desk like that its very unlikely to sag at all. I have a 2m solid oak worktop desk, with just a steel leg in each corner, so more span in the centre than yours and it has been about 5 years now and it hasn't sagged even 1mm. Thats with a desktop pc, monitor, full sized amp and two big shelf speakers ontop of it.

BTW, that looks really nice. I was in two minds about walnut or Oak as they both look great.
 
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Don't worry about it sagging. With a laminated wood desk like that its very unlikely to sag at all. I have a 2m solid oak worktop desk, with just a steel leg in each corner, so more span in the centre than yours and it has been about 5 years now and it hasn't sagged even 1mm. Thats with a desktop pc, monitor, full sized amp and two big shelf speakers ontop of it.

BTW, that looks really nice. I was in two minds about walnut or Oak as they both look great.

Mine started to sag a little, hence why I got the steel :)
 
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Sorry for old thread revival but I just wanted to say thank you for the steel u-channel idea, I had the same issue and found this thread through google. The steel channels have worked out great.
Desk is strong and straight as an arrow even with 3 monitors, 2 keyboards and headphone amps

 
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Soldato
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Sorry for old thread revival but I just wanted to say thank you for the steel u-channel idea, I had the same issue and found this thread through google. The steel channels have worked out great.
Desk is strong and straight as an arrow even with 3 monitors, 2 keyboards and headphone amps


Looking good! You've probably used 2 bits too many though :p

I would imagine the bending strength of a single steel beam would be enough to prevent sag :)
 
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Just bought a new work top to use as a desk (IKEA Karlby), and as it's quite heavy (and long at 2.4m), I suspect it's going to start bowing/sagging in the middle.

I've been trying to find an elegant solution like a pre made desk brace/beam, but can't seem to find anything online.

Looking for approx 2m wide, as I've got a set of drawers at each end of the work top.

Any help is much appreciated.

Pic:


There's a good calculator that someone came up with to work out whether the wood will sag.

https://www.woodbin.com/calcs/sagulator/

Need to put in your dimensions, wood type, and how much load is going on there, and it'll tell you if the wood is thick enough etc.


Edit: Just realised this was an old thread, the above may help others though.
 
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A few dome-head screws and 25mm outer diameter washers from Screwfix. One in every third slot.

It's holding up well, incredibly sturdy - can't see it going anywhere soon :)

Here's what I went with:

I know this is a very old post by now, but could you say where you got the channels for that price?
 
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Looking at doing a custom desk shortly with some oak worktop but mine will be 200x96 with alex drawers at each end, but then will put 4 legs along the back, normally would do a baton on the wall, but its only in a temp location so don't want to put loads of holes in the wall.

Would that be enough support or am I better getting some of the unistrut and using that, was wondering if could use a router to cut channels out so the unistrut would fit flush and could have a strip of it at the front to stop sagging there?
 
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What thickness worktop? I'd put the numbers into the sagulator mentioned above on the basis it's supported at either end only for now and see what it says.
 
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Just put the numbers in based on a 160cm span (200 minus the Alex units), 96cm depth, 38mm thickness, 100kg load on the centre and it's fine.

You'll need to re-run the numbers if you are using thinner material.
 
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Thanks for the replies, its 40mm thickness, I did look at the sagulator but wasn't sure how accurate it was as worktops often made up of staves rather than one solid bit of wood.

@Abyss thanks for that, the centre load wont be anywhere near 100Kg so thats sounds good
 
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In theory a worktop made of staves should be just as strong if not stronger than a single piece. You won't have a problem with 40mm timber.

Exactly my worktop, 2 metres spanning two Alex units and 18+ months on its been perfect with a monitor arm supporting a 48" widescreen (not bothered to reinforce).
 
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