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question about weight of mdf
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shateredsoul:
how much does a sheet of mdf weigh? i'm not looking for any specific size, I just want to get an idea of how much it weight in comparison to plywood
crashwg:
3/4" Ply ~75lb
3/4" MDF ~ 100lb

Here's a thread about the weights of different thicknesses of MDF in which I detail how determine the weigh of MDF in reply #6:

http://forum.arcadecontrols.com/index.php?topic=31918.0

And a rule of thumb for plywood is 25lb per quarter inch of thickness @ 4x8.
SammyWI:
From what I've seen online:

MDF = approx 48 lbs/ cu ft

Plywood = approx 36 lbs / cu ft

Those numbers will vary some but they line up well with crashwg's numbers and with how they feel when you pick up one of each.
shateredsoul:
Ahh.. so my friend was right about a sheet of mdf weighing about 100lbs..

I was thinking of going with mdf because it looks nicer when painted and it saves on cost.. but if I use two sheet we're talking about 50lbs more, hmm that's not too bad.

Sectorseven:
Heh, I remember working my first day at a construction job where I had to move about a hundred of those MDF boards down a flight of stairs. I was trying to show off to the older guys by bringing like 3 down at a time. They practically had to carry me out at lunch break  :-[
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