to those of you who are experiencing structural failure, try poly-iso
foam board, it
comes in varying thickness, and is exceptionally strong for it's
weight, you can
find it at any roofing supply house, for use as table top only
mel perry
On Jan 27, 2013, at 4:38 PM, Luther wrote:
I also have used material from a 1995 layout, open grid, using
joists every 12 - 14 ". I covered this with 2" constrution foam
board, pink and blue. My present layout uses most of this same
material and construction. I have one short-18" section of chip
board with 1x3 frame underneath. last spring I found a hump like
Bill had in a section of track on this section. Nowhere else on the
12 x 22 oval of benchwork had any problem. Also had a BTS unpainted
Ma&Pa flat car with a camel hump with the decking. I try to keep
the humidity at around 45-50%. A dehumidifier runs all during the
cooling season. It seems to me the foam board does not react to the
wood dynamics. My basement in WV is heated and cooled with the dual
zone system with a humidifier built in.
Luther "S"tephens
--- In [email protected], "gsc3" wrote:
>
> Merely for information my current layout has had no contaction/
expansion issues of any magnitude. However I used the same wood to
built 3 previous layouts that only reached the benchwork or basic
trackwork stage. The wood for this layout had, for the most part
been in the basement at least 3 years before this layout. I suppose
the rule about aging wood in the basement for a year is true.
>
> George Courtney
>
> --- In [email protected], "Bill Lane" wrote:
> >
> > Thanks Guys.
> >
> >
> >
> > I used ¾" plywood exclusively for the benchwork construction
including 12
> > ply birch for the frames. It was glued and screwed everywhere!
I thought the
> > stability was rock solid without ANY movement possibly. I do
not have a
> > humidifier/dehumidifier. There is a vent cut in duct so the
basement gets
> > some of whatever the main zone of the house HVAC is doing at
that time. I
> > think it is reasonably stable for temperature throughout the year.
> >
> >
> >
> > So I guess I now have to look for some track gaps opening up in
the summer?
> > The layout was built February to September 2011 and assembled
in October
> > 2011. I guess I will see what happens this coming summer.
> >
> >
> >
> > Not wanting to prefer 1 response over another I now think the
lower humidity
> > contracted the wood causing some track issues. But the lowering
of the
> > humidity was caused by zombies! That is my story & I am
sticking to it!
> > (:->)
> >
> >
> >
> > Thank You,
> > Bill Lane
> >
> > Modeling the Mighty Pennsy & PRSL in 1957 in S Scale since 1987
> >
> > See my finished models at:
> > http://www.lanestrains.com
> > Look at what has been made in PRR in S Scale!
> >
> >
> >
> > See my layout progess at:
> >
> >
> > http://www.lanestrains.com/My_Layout.htm
> >
> > Custom Train Parts Design
> >
> > http://www.lanestrains.com/SolidWorks_Modeling.htm
> >
> > PRR Builders Photos Bought, Sold & Traded
> > (Trading is MUCH preferred)
> >
> > http://www.lanestrains.com/PRRphotos.xls
> >
> > ***Join the PRR T&HS***
> > The other members are not ALL like me!
> > http://www.prrths.com
> >
> > http://www.lanestrains.com/PRRTHS_Application.pdf
> >
> > Join the Pennsylvania Reading Seashore Lines Historical Society
> > It's FREE to join! http://www.prslhs.com
> > Preserving The Memory Of The PRSL
> >
>
