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Forum topic by tyskkvinna posted 786 days ago 1691 views 0 times favorited 45 replies Add to Favorites Watch
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tyskkvinna

1308 posts in 1612 days


786 days ago

I am working a project that will require me to make a ”’butcher block” style table that will be roughly 100 inches by 50 inches. It’s going to be out of hard maple (what else) and roughly 5” thick.

What I need advice on is—should this get a layer of plywood on the bottom for stability or should it be okay on its own? I figure if it does require plywood I should do that from the get-go to make it easier rather than try to flatten all sides later and glue it to the ply.

If you all think it will be okay on its own then I will just go ahead without it..

Thanks!

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt


45 replies so far

View Andrew Betschman's profile

Andrew Betschman

284 posts in 1849 days


#1 posted 786 days ago

What sort of base is this going on?
At 5” thick you will be fine. No ply wood necessary.

-- Andrew, Ohio http://andrewmbetschman.com/

View waho6o9's profile

waho6o9

4824 posts in 1203 days


#2 posted 786 days ago

Let’s see, 100 inches is around 8 feet long. I would suggest some type of leg support around the perimeter.
The one in the picture is 10inches deep and is 24” x 18”. My friend has one similar and it weighs so much it’s incredible.

A base may be more appropriate to keep it from sagging.

View Viktor's profile

Viktor

447 posts in 2044 days


#3 posted 786 days ago

Am I reading it right: 100×50x5” maple butcher block?! That will be around 300 kg (700lb).
It will definitely need a solid apron underneath around the perimeter and maybe across the middle. You should not glue it to anything because a block this size will expand and contract quite a bit with moisture variation.

View adaughhetee's profile

adaughhetee

101 posts in 1309 days


#4 posted 786 days ago

A table that size could be very hard to move. At 44 pounds on average per cubic foot x 14.47 cubic feet = 637 pounds for the top alone. If its an option it may be more practical to use 3”thick with two rows of 5” around the perimeter as kind of a skirt. That would still give you the impression of a 5” top with out the weight (around 250lbs less if my math is correct) To move a 50” wide table through a doorway you will have to pick it up turn it on it’s side and maneuver it through the doorway. It would be a problem at around 650 pounds total unless you have very, very strong friends.

View bent's profile

bent

311 posts in 2295 days


#5 posted 786 days ago

that’s 174 bdft! it’s going to be a monster. i’m curious about this project now, please keep us updated.

View Chris 's profile

Chris

67 posts in 980 days


#6 posted 786 days ago

I agree you will not need a ply wood bottom.

-- Chris ~ Central Michigan

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tyskkvinna

1308 posts in 1612 days


#7 posted 786 days ago

Nope, it has to be 5 inches solid, this is not negotiable. :) The weight in and of itself is no big deal and neither is moving it. It’s going to a particular installation and the logistics of THAT have already been settled. I’m just asking about the stability of it.

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

View Jim Jakosh's profile

Jim Jakosh

11287 posts in 1731 days


#8 posted 786 days ago

If it is solidly glued, I see no need for a plywood bottom. That much wood may expand more than the plywood and be a problem to the plywood if they were glued together!

How will you machine the top? Will it fit on the CNC router table?
It will need a good frame to support all that weight!.........................Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View KenBry's profile

KenBry

449 posts in 1073 days


#9 posted 786 days ago

Holy Moly, That’s going to be a Monster, I just built a 73” x 24” x 4” top and it is a beast to move around. Who on earth needs a table that size and wieght?

-- Ken, USAF MSgt, Ret.

View MonteCristo's profile

MonteCristo

2094 posts in 814 days


#10 posted 786 days ago

You don’t want to glue the maple to the plywood if you use the latter. Plywood will not move (much) but the maple will. Given the weight of the maple, the plywood seems unlikely to do much anyhow unless you use really skookum plywood and lag it to the maple using slots instead of holes so they can move relative to one another.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

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tyskkvinna

1308 posts in 1612 days


#11 posted 786 days ago

How much do you think I can expect the maple to move? Would it be better to use epoxy to glue them up?

I want to layer the maple so I need to keep this as stable as possible.

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

View Rutager's profile

Rutager

27 posts in 929 days


#12 posted 786 days ago

Lis,

Since all the movement will be the same direction for all the pieces, I don’t think you’ll have any problem with it. If it will be used for food prep and get wet, use a waterproof glue like Titebond III. I would also cut your boards a little oversize and let them acclimate to your shop then take them to their final size.

Best,
Rutager

View tyskkvinna's profile

tyskkvinna

1308 posts in 1612 days


#13 posted 786 days ago

The boards are super dry and the table won’t come into contact with food. It will be under glass. And never actually be a cutting board, it will just look like one.

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

View IrreverentJack's profile

IrreverentJack

724 posts in 1469 days


#14 posted 786 days ago

Lis, Is this going to be an end grain top? My thoughts would be to strengthen the top with internal threaded rod (tensioned) going lengthwise. Compressing the vertical joints in the end grain would give you more options supporting it. It sounds very interesting. Please keep us posted. -Jack

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tyskkvinna

1308 posts in 1612 days


#15 posted 786 days ago

No, I was going to have it be long-grain… end grain is kind of a pain for the tools I have. I have been considering putting it under tension as well. it’s something I’m still considering.

-- Lis - Michigan - http://www.missmooseart.com - https://www.etsy.com/people/lisbokt

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