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Posted by Mike Paulsen on July 2, 2009, 11:38 pm
G Mulcaster wrote:
> I have to span 13'. Regular scaffold staging won't work in this case.
>
> Would a 14' - 2 X 12 plank support my 200 lbs?
A 14' 2x12 plank of what? You could be fine with one #2 grade 2x12 and a
goner if you pick the one right next to it. If you do get a 2x12 you
want to make sure it's stamped (or labeled) as Scaffold Grade, which
meets stricter requirements for knots, grain slope, etc. You may have to
go to a real lumberyard to find one.
>
> Any suggestions would be appreciated.
Rent an aluminum extension plank.
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Posted by Red Green on July 2, 2009, 11:46 pm
> I have to span 13'. Regular scaffold staging won't work in this case.
>
> Would a 14' - 2 X 12 plank support my 200 lbs?
>
> Any suggestions would be appreciated.
>
> Thanks, Gary
Double the 2x12's. You would only have a 6" on each end and with bowing
you'll end up with less. Not good. Plus, you get a bad board and it could
snap or split.
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Posted by Pete C. on July 3, 2009, 9:11 am
G Mulcaster wrote:
>
> I have to span 13'. Regular scaffold staging won't work in this case.
>
> Would a 14' - 2 X 12 plank support my 200 lbs?
>
> Any suggestions would be appreciated.
>
> Thanks, Gary
You most certainly can span 13' with regular scaffold components, they
are available in every conceivable variation to handle any situation. Go
to your local scaffold supplier (not Home Depot rental or the like) show
them a sketch of your application and rent the scaffold components
required for the application.
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Posted by SteveBell on July 3, 2009, 9:18 pm
G Mulcaster | 2009-07-02 | 9:00:22 PM wrote:
>I have to span 13'. Regular scaffold staging won't work in this case.
>Would a 14' - 2 X 12 plank support my 200 lbs?
According to the Sagulator
<http://www.woodbin.com/calcs/sagulator.htm>, a ponderosa pine 2x12
will sag almost 4 inches. If you bounce, it will sag more.
Adding a 2x4 brace reduces the sag to about 2 1/2 inches.
--
Steve Bell
New Life Home Improvement
Arlington, TX USA
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Posted by fftt on July 4, 2009, 3:55 pm
> I have to span 13'. =A0Regular scaffold staging won't work in this case.
> Would a 14' - 2 X 12 plank support my 200 lbs?
> Any suggestions would be appreciated.
> Thanks, Gary
as per the other replies.....
when at mid-span the deflection would be about 4 inches & the bending
stress above 1600 psi.
WAY too flexible & not strong enough (imo)
I would suggest a commercial scaffold platform piece or a homemade
unit of 2x4's on edge with plywood skins
What would be the result if the system failed? fall a few feet
or ????? be careful
cheers
Bob
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> Would a 14' - 2 X 12 plank support my 200 lbs?