I wouldn't even waste the time or money doing it in such a fool hardy
way.... OSB? No way!
"Old Nick" wrote in message
...
On Sun, 9 Jan 2005 12:29:52 -0600, "Pop" vaguely
proposed a theory
......and in reply I say!:

remove ns from my header address to reply via email

Not much pro there.

The bed liner material will not be cheap. The sheet will need to be
(roughly) twice as thick as ply of the same strength for your purposes
and is really dense. It hates water. Something will leak.

You would be far better off with well-painted exterior ply. It
probably won't cost much more either.

If you are getting down to the chipboard sort of level when building
boats, then expect failure to be the norm.

I plan to build a 8 x 16 ft. barge using 3/8 osb sheeting and covering it
inside and out with a spray on bed liner material. Any pro or con
comments
would be appreciated.

"Stephen Baker" wrote in message
...
Pop says:

I plan to build a 8 x 16 ft. barge using 3/8 osb sheeting and covering it
inside and out with a spray on bed liner material. Any pro or con comments
would be appreciated.


Read this first, then decide.

http://www.umass.edu/bmatwt/publicat...s_plywood.html

Also, be sure that the thickness is sufficient - 3/8" anything sounds
light for
a 16' barge, but it all depends on what the "barge" is used for.

Steve
//////////////////
Logs are ground into thin wood strands to produce oriented strandboard.
Dried strands are mixed with wax and adhesive, formed into thick mats, and
then hot-pressed into panels. Don't mistake osb for chipboard or waferboard.
Osb is different. The strands in osb are aligned. "Strand plies" are
positioned as alternating layers that run perpendicular to each other. This
structure mimics plywood. Waferboard, a weaker and less-stiff cousin of osb,
is a homogeneous, random composition. Osb is engineered to have strength and
stiffness equivalent to plywood.

Performance is similar in many ways, but there are differences in the
service provided by osb and plywood. All wood products expand when they get
wet. When osb is exposed to wet conditions, it expands faster around the
perimeter of the panel than it does in the middle. Swollen edges of osb
panels can telegraph through thin coverings like asphalt roof shingles.

So make sure edges are sealed and joints filled with epoxy paste and all
sealed with epoxy glass then no difference, even ply edges will wick if
exposed.

After all it is the same glue in use on both products.

I feel that where a dual shin of material is required the under surface
could be substituted with OSB.

I have read enough to scrap this idea, will go with exterior grade plywood.
Thanks
"Pop" wrote in message
...
I plan to build a 8 x 16 ft. barge using 3/8 osb sheeting and covering it
inside and out with a spray on bed liner material. Any pro or con comments
would be appreciated.

You'll not be building a boat, you'll be building a sink... :)




"Pop" wrote in message
...
I plan to build a 8 x 16 ft. barge using 3/8 osb sheeting and covering it
inside and out with a spray on bed liner material. Any pro or con comments
would be appreciated.

On Tue, 11 Jan 2005 09:11:30 -0600, "Pop"
vaguely proposed a theory
.......and in reply I say!:

remove ns from my header address to reply via email

I have read enough to scrap this idea, will go with exterior grade plywood.
Thanks

As was said, a lot depends on your usage, but 3/8" of anything for a
16 x 8 barge is probably not enough. It _might_ be OK with full
fibreglass sheathing, both sides. Might. A barge is by nature of its
shape a fairly weak structure, and the skin is very flat and prone to
bending. You will at least need lots of frames.

To give you a (rough) idea

http://www.duckboats.net/dewald1.htm

Shows a 13' by 5' boat using 3/8" ply. You would need to step up from
that quite a bit. His boat has chines and a keel, and the shape will
stiffen it.

Oh. And don't listen to his bit about glass mat being stronger faster.
Cloth is way stronger per weight. Mat was used a lot to bulk up boats
that were glass only. It is resin-rich and not strong.

Also try http://www.devlinboat.com/dcduckboats.htm. They use sheathed
1/2" for a similar sized boat to yours. BUt these are tough boats, for
choppy conditions.

I have never hunted a duck! This just seemed the sort of size and
materials you were looking at.

Tom wrote:
On Sun, 9 Jan 2005 12:29:52 -0600, "Pop" wrote:

Go for it!!
You don't have that much to lose.

Yeah, what the Hell, it's not your life.


I plan to build a 8 x 16 ft. barge using 3/8 osb sheeting and covering it
inside and out with a spray on bed liner material. Any pro or con comments
would be appreciated.