[RE-wrenches] Vertical wall, shared rails

[cpickard aladdinsolar.com]

Yes, laser level does the trick. Also--don't forget to consider expansion/contraction of a single rail dimension. In Minnesota we would break that long length into two or even three separate mounting sections with an inch or two gap between. Don't forget, the building structure will also experience some expansion/contraction which will not necessarily be in sync with the rail changes. Over time, expansion/contraction could loosen attachment points.

--Charlie Pickard

TruNorth Solar, Aladdin Solar 

> On October 18, 2016 at 7:01 AM Chris Mason <cometenergysystems at gmail.com> wrote:
> 
>     I use a laser plumb, sit it on the ground over your marks and loft the marks to the top. It will be very accurate.
> 
>     On Mon, Oct 17, 2016 at 7:49 PM, Benn Kilburn <benn at skyfireenergy.com mailto:benn at skyfireenergy.com > wrote:
> 
>         > >         Hello Wrenches,
> >         Wondering if any of you have ever done anything similar to installing on a vertical wall using a horizontal shared rail racking system, array being about 32.8m (110') wide and 26.3m (86') tall
> > 
> >         The rails obviously have to be exactly perpendicular the entire length so we are taking extra care that the first row (top row) is true and using template spacers for each row down.  Only problem is that the top of the building is a concrete parapet and anything but level.
> > 
> >         Wondering if anyone has any good tips for getting that top row level/square and  keeping the rest of the rails perfectly perpendicular? (keeping in mind the length...32.8m (110')
> > 
> >         Much Thanks,
> > 
> >          
> > 
> >         Benn Kilburn 
> >         CSA Certified Solar Photovoltaic Systems Electrician, SkyFire Energy Inc
> >         14515 – 121A Ave NW | Edmonton, AB | T5L 2T2
> >         P: 780-474-8992 | F: 888-405-5843 | www.skyfireenergy.com http://www.skyfireenergy.com/
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> > 
> >          
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>     --
>     Chris Mason
>     NABCEP Certified Solar PV Installer™
>     Solar Design Engineer
>     Generac Generators Industrial technician
> 
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