[RE-wrenches] Corrugated roofing mounts

[Ray Walters]

I've got a project right now on a steel roof.  I was just at a trade 
show last week, so I got to look at the latest gizmo from S5.
I didn't like it at all, it didn't go into the valleys like the old 
mount, but drilled 4 holes into the side of the ridge, and just counted 
on the roofing to hold the modules.
I wanted to use the new ZEP rack, but never heard back from them, I 
guess my project is too small (4 Kw).
I'm going with SnapNRack blocks through the ridge top, and I'm going to 
go through the purlins into rafters or 2x blocking as needed.

Also,  a related subject, I'm using the new HeadLok Lags from 
FastenMaster.  They claim to be stronger than a 3/8" lag, but they have 
a 3/16"D shaft.
I've had trouble with regular cheap Home Depot lags twisting off, so at 
least these have actual strength ratings, and don't require predrilling.
They also have a no rust guarantee....
Has anybody else used these? (or the similar Timberlok)?

Thanks,

R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified, Licensed Contractor
808 269-7491

On 2/18/2013 9:25 AM, William Miller wrote:
> 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 <august at luminalt.com 
>> <mailto:august at 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
>>
>>     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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