I am planning to build a desk that is nearly 12 feet wide to support 3 computers. There will be two cabinets on both ends, and if possible I would prefer to not need a 3rd cabinet or post in the middle to support it from sagging. Below is a picture similar to what I would like to accomplish.

What techniques could I use to strengthen the top of the desk?

enter image description here

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    This question comes up often. Have you read any of the other answers? 1, 2, 3 – isherwood Nov 21 '16 at 15:25
  • The strength in a desk like that comes from the supports that are built into the wall. For hidden supports like in the photo, they have to be planned when the wall goes up (or you need to pull the sheetrock down). You'd typically be using larger steel angles and then the desk would 'slip over' them. – DA01 Nov 21 '16 at 15:29
  • No I haven't. Thanks, I'll take a look at those. – Ben Harrison Nov 21 '16 at 15:29
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    One more: 4 – isherwood Nov 21 '16 at 15:29
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    @Harper of course, but then they're not hidden like the photos. I would argue if one is going for the above look, they might as well go all-out. :) – DA01 Nov 21 '16 at 16:21