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Span limits of 1 1/4" mdf

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Forum topic by xylophage posted 04-23-2012 10:33 PM 1052 views 0 times favorited 3 replies Add to Favorites Watch
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xylophage

70 posts in 1289 days


04-23-2012 10:33 PM

Topic tags/keywords: veneering question

I am building a desk top that is made up of 1 1/4” mdf. That will be veneered with 1/16” of an inch quilted maple, on both sides. It will have a boarder of 3” wide 1 3/8” thick bubinga. It will be supported by legs on the four corners and the aprons in between the legs.

The over all demotions of the mdf center will be 20” deep and 54” wide. With the bubinga boarder it will be 26” deep and 60” wide.

I was wondering if there is any danger that the top could sag or warp, in anyway?

Any input would be great. I searched for span limits of 1 1/4 mdf but could only find limits for 1/2”,5/8”, and 3/4”.

Personaly, I believe the boarder of bubinga will add a lot of strength?

-- D.A Winograsky


3 replies so far

View Lee Barker's profile

Lee Barker

2169 posts in 1605 days


#1 posted 04-24-2012 04:33 AM

Are there pedestals, or just legs and an apron?

What you’ve got going here is a chance to get the strength you need from the apron stock.

Given that, I don’t see the advantage of going to a top that thick. It will weigh something around 35 lbs, just the core piece. I’m guesstimating the bubinga will more that double that.

Putting that much mass on four legs might be an interesting journey.

Does the top have to be consistent thickness all the way through?

Kindly,

Lee

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View Loren's profile

Loren

7832 posts in 2403 days


#2 posted 04-24-2012 04:39 AM

With aprons you’ll be fine.

-- http://lawoodworking.com

View davidroberts's profile

davidroberts

1011 posts in 2241 days


#3 posted 04-24-2012 04:54 AM

Like Loren said aprons will add a lot of strength all the way around. If you are still concerned, you could add a cross member from front to back. Even a one inch hardwood cross member would add some support. This next option may not be to your liking but a 3/4 or even 1/2 inch square tube cross member tucked away in slots in the aprons would sure firm it up.

-- God is great, wood is good. Let us thank Him for wood......and old hand tools.

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