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Posted

So, I made an assembly table, to use as an outfeed table and a building table for my RC models. Top needs to be flat. Usual type of construction. Meranti base using stretchers and cross-braces with 21mm Birch ply top. Only to find the middle sagging by 5mm.  :cursing:

 

Did not want to use Pine because our Pine these days are so damn wet. The Meranti I used for the strecthers were 69mm by 32mm. Thought that would be strong enough. Never though Meranti had such low bending strength. 

 

So my solution now is to build a storage bay in the middle using Birch ply to support the middle.

 

If I think about it now I should have used Spruce for the base. More expensive than Meranti or Pine but cheaper than Beech or other hardwoods. Or would have used much wider strechers. You live and learn.

 

Did you seal both sides of the plywood? You'd be surprised how much birch ply can also warp from irregular moisture content.

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Posted (edited)

Did you seal both sides of the plywood? You'd be surprised how much birch ply can also warp from irregular moisture content.

 

Not yet. Only finished the table last weekend.

Edited by Moridin
Posted

So, I made an assembly table, to use as an outfeed table and a building table for my RC models. Top needs to be flat. Usual type of construction. Meranti base using stretchers and cross-braces with 21mm Birch ply top. Only to find the middle sagging by 5mm.  :cursing:

 

Did not want to use Pine because our Pine these days are so damn wet. The Meranti I used for the strecthers were 69mm by 32mm. Thought that would be strong enough. Never though Meranti had such low bending strength. 

 

So my solution now is to build a storage bay in the middle using Birch ply to support the middle.

 

If I think about it now I should have used Spruce for the base. More expensive than Meranti or Pine but cheaper than Beech or other hardwoods. Or would have used much wider strechers. You live and learn.

 

Oh, BTW, the top is 1m by 2m.

Yeah, some meranti is really ***, I'll admit. But TBH Moridin, that puny plank would never have found its way onto a bench base..... particularly as the tabletop support.... 

 

:P

Posted

That's like me continuing to say that the reason my lightie's bed frame drooped in one corner is because it was a "softer piece" of pine. when in fact I'd just put 2 coach screws in, not 4. 

damned .... I was hoping you were going to say you and a test pilot were pushing the limits of the overhead handcuff hooks on the overhead bunk!

Posted

Have a funny story about a Pine cupholder for tootbrushes we had in our one bathroom. So it was mounted not far away from the toilet. One day my mother decided said cupholder was a great handle to use to pull her up from the toilet. A moment later she was sitting down abrubtly on the toilet with the horisontal piece of the cupholder in her hands.

 

Pine; in my household known as Pinus Crappus.

Posted (edited)

You should add a sacrificial fence to the mitre saw, will prevent the piece shooting off (kickback or kick forward in this case) into the next century.

FH19DJF_591_08_127.jpg

 

Yeah, I've been meaning to make a zero clearance fence and insert. I've been doing a lot of mitre and bevel cuts lately though so it would be a bit of a pain to put the fence on for 1 cut.

 

So instead I used the extremely safe method of using a stick to stop the block from pushing back  :ph34r: :lol:

 

Once I'm done with all this skirting and cornicing I'll put a zero clearance fence on. They produce far neater cuts.

 

EDIT: I see the fence in your pic is more like a crosscut sled for a table saw. Good idea. It means it can be put into place just for the cut required, and doesn't necessarily need to be fastened to the fence.

Edited by patches
Posted

Jeepers. Those are good prices, man. A couple of those wood make a KILLER dining table / coffee table. 

Ok good to know re the prices. I am at Leroy Merlin fairly often and this is the first time I have seen this. I have not seen any slabs like this before at a general hardware store.

Posted

I was at Leroy Merlin this weekend and they had these slabs of wood. Man they looked so good. I wanted to buy them all. Not sure what I wood(on purpose) have done with them but who cares. Did seem a bit pricey though. Have no idea what wood it is.

 

I had my first Leroy Merlin experience a few weeks ago and I was blown away. I really wish that they would open up a branch in Pretoria.

 

I was also ogling the stack of wood when I was there.

Posted

I had my first Leroy Merlin experience a few weeks ago and I was blown away. I really wish that they would open up a branch in Pretoria.

 

I was also ogling the stack of wood when I was there.

Did you go to the Greenstone Branch?

I live a few min away so I am lucky.

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