[RE-wrenches] Steel pipe purlins

[Daryl DeJoy]

We use Marutex screws on steel pipe purlins in the Bahamas. They are
expensive but the strongest available screw that I know of, particularly
good in hurricane territory and their molybdenum/stainless composition does
not corrode.
The last one we completed used Snap n Rack corrugated metal roofing
attachments (single screw per attachment) and 2.5" Marutex 5/15 hex head
screws (about $1.25 each) and attachment points every 48", totaling 820
screws, but has held up very well in some high winds, so far.

Daryl

On Wed, Apr 3, 2024, 7:47 PM Jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> If your looking to fasten into the steel pipe you look at
>
> Dynamicfasteners.com
>
> Great products
>
> Jay
>
> On Apr 3, 2024, at 5:34 PM, david quattro via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
> because it is an awning seems like you may be able to disturb the roof
> layer above the purlins, even if temporarily?
> If so then i think an Iron Ridge top cap could be turned upside down.  you
> can fasten the Ubolts around the purlins
> maybe overkill   and also maybe hard to waterproof, if waterproof is
> something they need
>
> On Wed, Apr 3, 2024 at 3:59 PM William Miller via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Colleagues:
>>
>>
>>
>> I have been asked to bid on installation of PV on a steel barn.  The
>> mounting area is an awning with steel pipe purlins.  See photo below of a
>> section of the plans.
>>
>>
>>
>>
>>
>> I have mounted racking to a lot of different steel structures, but never
>> one with steel pipe purlins.  I would normally use the EJOTs with thread
>> forming shanks, but I don’t know how well they will work in steel pipe.
>>
>>
>>
>> Has anyone else ever faced this situation?
>>
>>
>>
>> Any help is appreciated.
>>
>>
>>
>> William Miller
>>
>>
>>
>> Miller Solar
>>
>> 17395 Oak Road, Atascadero, CA 93422
>>
>> 805-438-5600
>>
>> www.millersolar.com
>>
>> CA Lic. 773985
>>
>>
>>
>>
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