Chris:
We have used the S5 corrugated product before and choose not to repeat the
experiment for these reasons:
1. Making roof perforations in any valley defies common sense.
2. The threaded mounting holes stripped very easily.
3. I have determined that most common wavelength of corrugated roofing we
have encountered is 2.67". If you don't have purlins, this is not a
problem since a rafter is 1.5" wide. Worse case scenario, if a rafter is
not under the peak of the corrugation you scab a piece of 2X8 next to the
rafter and achieve a mounting member to fasten to. This is much easier
than adding blocking to create purlins. This only works if you are
installing a fastener through the peak of the corrugation. With the S5
product you have to find framing under two locations, not one.
William Miller
At 02:04 PM 2/16/2013, you wrote:
The S-5 bracket looked interesting until I realized that, on a rafter
roof, you would never consistently find the rafter under the holes. Even
with the SnapNRack single hole unit, getting it over 2 x 8 rafters is a
nightmare. I have never seen rafters that would allow for holes through
two valleys. So the only other way would be to fasten to the purloins.
3/4" purloin strips are not going to give you a lot of embed.
On Sat, Feb 16, 2013 at 7:18 PM, August Goers
<<mailto:aug...@luminalt.com>aug...@luminalt.com> wrote:
Hi William,
You may have already seen this corrugated bracket from S-5:
<http://www.s-5.com/clamps/index_2624.cfm>http://www.s-5.com/clamps/index_2624.cfm
I believe it's best to have the screws go into purlins. These are fairly
low cost; contact me offlist if you want me to send you distributor
contact info.
As far as figuring out what manufacturer/model of roof you have that can
be tough. Maybe find original building drawings or a sticker somewhere on
the underside? I've also found that the folks at S-5! are good at figuring
out manufacturers.
Good luck! -August
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