Which is strongest,...
 

  You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more

[Closed] Which is strongest, ply or Mdf?

27 Posts
18 Users
0 Reactions
272 Views
Posts: 4936
Full Member
Topic starter
 

Making a bed base in the back of my van. So which is strongest for a given thickness?


 
Posted : 03/06/2014 6:57 pm
Posts: 13942
Full Member
 

Decent plywood - and much lighter for a given thickness too.


 
Posted : 03/06/2014 7:00 pm
Posts: 341
Free Member
 

mdf gives off formaldehyde fumes,best to avoid in a van


 
Posted : 03/06/2014 7:00 pm
Posts: 0
Free Member
 

ply!


 
Posted : 03/06/2014 7:05 pm
Posts: 8669
Full Member
 

I used MDF for a show shelf in my hoos. It warped within minutes under light load. #OMGAVOID


 
Posted : 03/06/2014 7:17 pm
Posts: 47
Free Member
 

MDF has no structural stiffness at all.

Plyboard a the way, and marine ply is best for finish if you're not covering it up.


 
Posted : 03/06/2014 7:27 pm
Posts: 0
Free Member
 

Good tricoya mdf could be ok, but at £150/sheet I'd avoid. For a bed base I'd be using 18mm ply, something decent and not from homebase as it's mind buggeringly expensive from there!


 
Posted : 03/06/2014 7:29 pm
Posts: 0
Free Member
 

Or veneered birch core ply, marginally cheaper than marine ply and voids in the laminates are rare.


 
Posted : 03/06/2014 7:29 pm
Posts: 0
Free Member
 

.


 
Posted : 03/06/2014 7:30 pm
Posts: 0
Free Member
 

Fwiw, marine ply and straight faced are exactly the same with the exception of marine having one outer laminate that's thicker. Just avoid the stuff with knots in it and you'll be fine.


 
Posted : 03/06/2014 7:32 pm
Posts: 0
Free Member
 

Ply for sure. Resists water and warping better.
Vohringer ply if you want to save weight and have the cash.

1/3 lighter than normal ply, but only really worth it if you are using lots of it, or if you want the veneer showing. It is very nice stuff though.


 
Posted : 03/06/2014 7:47 pm
Posts: 4936
Full Member
Topic starter
 

Cheers guys, & sorry for putting it in the wrong section!

Ply it is then 🙂


 
Posted : 03/06/2014 7:49 pm
Posts: 13942
Full Member
 

Whereabouts are you mugboo?


 
Posted : 03/06/2014 7:59 pm
 Andy
Posts: 3337
Full Member
 

Yeah vohringer ply is the shizzle for van furniture. Masses lighter than mdf or plywood.


 
Posted : 03/06/2014 8:07 pm
Posts: 10474
Free Member
 

Imagine an MDF Mosquito!


 
Posted : 03/06/2014 8:47 pm
Posts: 10474
Free Member
 

Oops. Double post. Sorry.


 
Posted : 03/06/2014 8:47 pm
 joat
Posts: 1447
Full Member
 

Can't believe nobody has said it;
There's only one way to settle this... Fiiiiight!
IGMC

And yeah, ply.


 
Posted : 03/06/2014 8:48 pm
Posts: 4936
Full Member
Topic starter
 

Brighouse Chief


 
Posted : 03/06/2014 10:16 pm
Posts: 0
Free Member
 

Can also get quite reasonable water resistant OSB - much cheaper than ply, and strong enough. Not as nice looking though, but that's not important if you're going to carpet/cover/paint what you're making.


 
Posted : 03/06/2014 11:18 pm
Posts: 10567
Full Member
 

Flooring grade chipboard is something else to consider.


 
Posted : 04/06/2014 5:15 am
Posts: 4936
Full Member
Topic starter
 

Biggest thing I need to consider is the depth of the material, I've built the wheel arch boxes to the same height as the bench seat when it's folded flat. In use our bodies will be on the boarded area and our feet on the bench seat. I want to leave as much room as possible so we can sit upright against the tailgate.

It's a SWB T4 by the way.


 
Posted : 04/06/2014 6:02 am
Posts: 0
Free Member
 

Use 18mm ply for anything you're sitting / lying on, 12 will bend quite a bit!


 
Posted : 04/06/2014 6:39 am
 br
Posts: 0
Free Member
 

tbh if you look at most comfy beds they don't have flat base but a slatted one - have you considered combining both a using a thinner ply with vertical edge supports attached to horizontal slats?


 
Posted : 04/06/2014 6:54 am
Posts: 251
Full Member
 

Have a look at this page on the Mike_D van thread;

[url= http://singletrackmag.com/forum/topic/family-friendly-bike-carrying-camper-build/page/4 ]http://singletrackmag.com/forum/topic/family-friendly-bike-carrying-camper-build/page/4[/url]

some good ideas on bed arrangements.


 
Posted : 04/06/2014 7:04 am
Posts: 13942
Full Member
 

See if you can find any caravan/yacht builders near you - they will have the ply you need! 18mm makes sense for the wide weight bearing parts but other parts can be done with thinner ply.


 
Posted : 04/06/2014 7:18 am
Posts: 0
Free Member
 

Have you ever left standard wbp ply in a warm environment for long? Gives off eye watering fumes. When we make bolt boxes for steel columns and leave them in a site container it genuinely is nasty on a warm day. I'd be wary in the back of a van for the same reason.


 
Posted : 04/06/2014 7:28 am
Posts: 0
Free Member
 

Plywood definitely. As @chiefgrooveguru says marine ply is excellent, very strong for a give thickness, it is more expensive though.


 
Posted : 04/06/2014 7:29 am
Posts: 4936
Full Member
Topic starter
 

Read Mike_D's thread, very impressive indeed. And I agree about the slats but times tight at the moment so I'm thinking of this as Mk1. See how it works in use then maybe build Mk2 over winter.

Thanks again peeps.


 
Posted : 05/06/2014 6:59 am

6 DAYS LEFT
We are currently at 95% of our target!