Plywood cubic foot weight?

[BrianY]

I need to know the weight (in pounds) per cubic foot of meranti marine plywood. My calculations have it at about 37 lbs/ft3, but I'm not very confident in my math skills. Anyone know if this is correct?

[JimD]

Here's a link to Westwind Hardwoods who give weights to their sheet plywood. Looks like the weight will vary based on the grade (ie, bs1088 or 6566). The 1088 has more veneers for the same thickness and weighs a bit more, so maybe it's the glue that makes the difference. But a sheet of 3/4" 1088, which is 2 cubic feet, weighs 72#s or 36# per foot, so your calculation seems correct depending on whose plywood and what thickness you are using.

http://www.westwindhardwood.com/wood_marine.html

[ 10-18-2005, 06:28 PM: Message edited by: JimD ]

[Popeye]

cut out a rectangular shaped piece of ply , and float it in a graduated cylinder of water,

or weigh one sq ft of it

[ 10-18-2005, 01:28 PM: Message edited by: popeye ]

[JimD]

weigh one sq ft of itGood one, popeye. :rolleyes: But of course you mean one cubic foot, not one square foot ;)

[ 10-18-2005, 01:42 PM: Message edited by: JimD ]

[Graham Knight]

I've found considerable variation between sheets of Meranti marine ply, even in the same batch from the same supplier purchased at the same time.
Solid Meranti varies from 400-650kg per cu m (25-40 lbs cu ft), there are many varieties of Meranti and a sheet of ply may contain more than one, the cheaper stuff I've seen appears to use lighter wood for the core and denser for the faces which tend to be quite thin.
In fact I find Meranti to be so inconsistant that I mostly used Okoume now, which is far more predictable and IMO nicer to use.

[Graham Knight]

But of course you mean one cubic foot, not one square footSurely he means 1 square foot, from which you can calculate the weight of 1 cubic foot?

[JimD]

Originally posted by Graham Knight:
</font><blockquote>quote:</font><hr /> But of course you mean one cubic foot, not one square footSurely he means 1 square foot, from which you can calculate the weight of 1 cubic foot?</font>[/QUOTE]Ok, how about I put it this way? A square is two dimensional. It has no weight at all and exists only on paper. So you'll need to weigh something with some depth. You could always weigh a foot square of 1/8" meranti and multiply by 96 but you'd want to be quite sure about the accuracy of your linear measurements and weigh scale. But now we are getting a bit silly and hijacking BrianY's post. Sorry about that, BrianY.