RE: Bay Splining

[Brian Hall]

As far as I know, the 56 S.F. maximum rule was established in the original
"Green Book" or maybe the original "White Book" and so contractors used it
as a rule of thumb when designing for a long time (some still do).

In regards to a rule for the spline being rolled in to each purlin, I've
only seen it in the master file manuals that are out there. In my humble
opinion, I believe that not rolling in the secondary members individually is
structurally incidental depending on the direction of the wind loading the
enclosure. With that said, the problem with "bay splining" is that if a
screen panel gets damaged with in about 6 months to a year of installing the
new screen, then the entire Bay will have to be replaced as opposed to a
single panel, thus incurring a greater cost to the homeowner. Typically,
the bay splining occurs on older enclosures that get an entire rescreen
done. This is partially due to the fact that installers don't want to lean
out onto the purlins to roll the screen into them (thus the recent addition
of the 300 lbs point load). There are of course other ways to accomplish
that task but generally, that is the default reason given. If it is a new
enclosure and it is pre-fabricated then most likely the secondary members
will get rolled in.

--
Brian
-----Original Message-----
From: Aluminum-Struct...@googlegroups.com
[mailto:Aluminum-Struct...@googlegroups.com] On Behalf Of Steve
Sincere
Sent: Saturday, June 09, 2007 12:45 PM
To: Aluminum Structure Contractors
Subject: Bay Splining

I have seen several example where installers will spline a whole
section of roof only around the edges (screen splined to beams, eave
rail and gutter only...not to purlins). This makes it one big panel.
Is this permissible?

I have also heard that there is an unwritten rule that no panel can be
larger than 56 square feet. Does anyone know if there is a hard and
fast rule on this somewhere? If so, I'm sure that the above would be
and infraction.

I know that you can't have panels wider that available screen widths
(or as wide due to working material). But is this "bay splining"
legal?

Steve Sincere

[Dave]

Hi Steve,

Back in history, 'the code' was the "A.A.F. Standards for the
Construction of Aluminum and Allied Products" (5-90 edition was last)
Published by: Aluminum Association Of Florida, Inc..

Section 104.11) The size of screen panels shall not exceed nine feet
(9"0") in any one dimension or exceed fifty-six (56) square feet in
total area.

IMHO, IF this Code of Standards had been adopted, up dated, AND
adhered to state wide, as it was in Pinellas County, our industry
would not be under the State's thumb now!

Dave Livesay