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 < [email protected]> 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 < > [email protected]> 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 < > [email protected]> 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 >> >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > <image001.jpg> > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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