Furniture Making

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Will this sag?

ChrisW Member

I have this commissioned TV stand to build. All the panels are 3/4" thick solid Sapele. Do you think it will sag with a 50" flat panel TV on top? If so, I can include a pair of feet in the center.

Click the link below to download the file included with this post.


2/23/15       #2: Will this sag? ...
Al Fortunato  Member


With that center support in there you should be fine.

2/23/15       #3: Will this sag? ...
rich c.

Just about any 50" long, 3/4" material will sag under it's own weight over a long period of time. How much would be the question. Obviously, add the support.

2/23/15       #4: Will this sag? ...
MVMatt Member

On a 24" deep stand the TV (and it's weight) will almost certainly be placed on the rear half. If you don't like the look of a third foot in front I think you would be OK with either a single support in the center of the unit, or one foot centered along the back and one support in the center but set back from the front 8 or so inches for support without visual impact.

2/24/15       #5: Will this sag? ...
AzFred  Member

How heavy is the TV and how deep is the shelf? Go to the link shown to the sagulator, a real great tool for this application

Sapele is listed as an option


2/24/15       #6: Will this sag? ...
ChrisW Member

Thank you for your responses. What I was wondering is if the center partition that runs top to bottom would stiffen the unit, sort of acting like a truss.

2/24/15       #7: Will this sag? ...
Al Fortunato  Member


Your cabinet is only 37" wide and with the center support being attached to the top, center shelf, and bottom, you will have the structural support of all 3 pieces, so effectively 2.25" thick material. As I said above you should be fine. If you really want to add a center leg for assurance, go ahead. If I was building it, I would build as shown in your drawing.

2/24/15       #8: Will this sag? ...
ChrisW Member

Thanks Al. That's what I was thinking. (I wasn't sure you meant the center partitions or the center foot; thanks for clarifying.)

2/24/15       #9: Will this sag? ...
Gene Wengert-WoodDoc

First, check the weight of the TV. We have a 43" Sony and it weighs around 25 pounds. A 55" weighs 53 pounds. Without the huge, heavy power supply and picture tube, the weight is really small. The stand will spread the weight out over the top, so it will not be concentrated in the center.

With sapele, the wood is already fairly stiff. Even without a support for a 55 pound TV with a stand that has contact points away from the center, you do not need to worry about sagging due to the tv.

Further, with either the center support or even just fastening the rear of the shelf, you will have little tendency to sag, using 3/4" of thicker. Note that to stiffen a shelf, in addition to the center support, or fastening the rear, you can also stiffen by making the shelf thicker. Thicker means much stiffer. (Compare the stiffness of the 2x4 flatness to vertical; four times stiffer on edge with only twice the thickness.) In fact, a thicker nose piece is also a good option at times.

Of course, as Al said, the center support as shown in your drawing will be more than adequate.

4/7/15       #10: Will this sag? ...
markbattles Member


If you don't like the look of a third foot in front I think you would be OK with either a single support in the center of the unit.

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