Thanks for the information, I really like these fasteners. Bronze not stainless? We normally use stainless for everything. Given our coastal location, we want to avoid corrosion.
On Tue, Jul 3, 2012 at 1:46 PM, Bill Hoffer <[email protected]> wrote: > Chris > > Bronze Star Construction Lags are what I use. I usually use the 5/16" and > 1/4" with the most thread I can into the truss without popping out the > other side. I have dropped to #7 with more penetrations if the truss > warranted it. > > http://www.screw-products.com/star-drive-construction-lag-screws.htm > > Here is their strength tests for 5/16", very comparable to lags. I tend > to be pretty conservative and use a 2x - 2.5x strength tests safety factor > with almost all my fasteners, especially blind attachment to trusses. Full > test results are available. > > http://www.screw-products.com/specs.htm > > I have had luck with Cannon gasket for butyl or EDPM washers, use .75 dia > outer with dia of fastener inner about .25" thick. About $.15 each for > 1000, about half that for 2500. Can order direct online. Buytl to me > works better since it flows well when tightened. > > http://www.cannongasket.com/ > > I believe there are several manufacturers making these types of screws > now, so there may be other sources. > > Hope that helps! > > > > Bill > > > On Tue, Jul 3, 2012 at 6:43 AM, Chris Mason > <[email protected]>wrote: > >> Bill, >> Can you provide a link to the product you are using - I found a lot of >> screws on that site but none called "structural". >> >> Thanks >> >> Chris >> >> On Mon, Jul 2, 2012 at 7:08 PM, Bill Hoffer <[email protected]> wrote: >> >>> Mark >>> >>> Lags for me are old hat after using the newer structural screws. I get >>> them local from www.screw-products.com although I know there are more >>> companies out there that make them for the Structural Insulation Panel >>> industry. Thinner than lags with comparable strength, they drive easy with >>> no predrilling, and are less likely to blow out a truss. Come in many >>> different lengths and use a special star head with a built in washer. I >>> use thick butyl tape on the foot and a small rubber washer on the screw >>> head , together they work great! If you want a little more security a dab >>> of the appropriate sealer in the foot slot before finally tightening it >>> down works too. Only way to go on corrugated metal roofs where there is no >>> real option for flashing. >>> >>> Bill >>> >>> >>> On Mon, Jul 2, 2012 at 3:40 PM, <[email protected]> wrote: >>> >>>> My 18V Milwaukee cordless hammer drill has no trouble driving a 5/16" >>>> lag into anything I've ever encountered. >>>> If you put the lag anywhere near the middle of the rafter it won't >>>> split. If it splits, it must be some cheap stuff from Home Depot. >>>> Only an engineer with no practical experience would insist on a pilot >>>> hole and the resulting reduction in holding strength. I'm assuming the IBC >>>> consists of a bunch of bureaucrats that value control over common sense. >>>> In this instance flashing offers no benefit, and may even be >>>> counter-productive if incorrectly installed and it causes rain to collect >>>> under it. My experience is in northern Indiana where it does rain and the >>>> wind does blow. (Record 91 mph winds last Thursday.) Less severe weather >>>> than Michigan, but close. >>>> I use the best silicone caulk Menards has to offer. I've never worried >>>> about compatibility. It definitely won't dry up and crack away like the >>>> black roof cement some swear by and insist on. 15+ year old silicone caulk >>>> is yellowed a bit but that's the only change. >>>> If the silicone and shingle aren't getting along, I've never heard them >>>> complain. >>>> >>>> Mark >>>> (Disclaimer: Portions of the preceding are the opinions of the author.) >>>> >>>> -------- Original Message -------- >>>> Subject: Re: [RE-wrenches] L feet no flashing in shingle roof >>>> From: Dave Click <[email protected]> >>>> Date: Mon, July 02, 2012 10:29 am >>>> To: [email protected] >>>> >>>> I always thought that installing lag screws was tough enough with pilot >>>> holes- I should hit the gym. I'm not a structural PE, but I think that >>>> not drilling pilot holes violates the American Wood Council's National >>>> Design Specs and therefore violates the IBC too. I would imagine that >>>> you'd be much more likely to split your trusses. IBC also requires >>>> flashings be used but at least around here inspectors never ask for it >>>> (which makes sense- as you all know, Florida never sees wind or rain, >>>> and definitely not at the same time). What silicone do you use that's >>>> compatible with asphalt shingles? >>>> >>>> DKC >>>> >>>> On 2012/7/1 21:13, [email protected] wrote: >>>> > In my 20 year experience of lagging down L feet on shingle roofs in >>>> > Indiana with a good dollop of silicone caulk under the foot, I've >>>> never >>>> > had an issue. No pre-drilling, just drive the lag home. Drilling a >>>> hole >>>> > first is not necessary, and reduces holding strength. No reason to >>>> make >>>> > a science project out of it and increase cost and labor. >>>> > >>>> > Mark >>>> > >>>> > -------- Original Message -------- >>>> > Subject: Re: [RE-wrenches] L feet no flashing in shingle roof >>>> > From: Drake <[email protected] >>>> > <mailto:[email protected]<[email protected]> >>>> >> >>>> > Date: Fri, June 29, 2012 3:09 pm >>>> > To: RE-wrenches <[email protected] >>>> > <mailto:[email protected]<[email protected]> >>>> >> >>>> > >>>> > Hi Jay, >>>> > >>>> > There is no room for flashings. The L feet will go very close to the >>>> > skylights and the flashing would hit the edge of them. Plus there is >>>> > an existing array that was done by another installer that is done >>>> > with L feet only. The new array would be higher. >>>> > >>>> > >>>> >> And given that we have really good off the shelf approved flashed >>>> >> feet, why would you use anything else? >>>> >> >>>> >> My 2 cents, >>>> >> >>>> >> Jay >>>> >> >>>> >> peltz power >>>> >> >>>> >> >>>> >> On Jun 29, 2012, at 5:16 AM, Glenn Burt wrote: >>>> >> >>>> >>> We have used a variety of sealants over the years, and determined >>>> >>> simple Henry roofing cement is the best product for use on comp >>>> >>> roofing. >>>> >>> >>>> >>> We also used to bend our own L-foot flashing, which we cut from >>>> >>> standard Al coil stock (before all the manufactured options were >>>> >>> available). This might be a good option for you in this case. >>>> >>> >>>> >>> >>>> >>> >>>> >>> Glenn >>>> >>> >>>> >>> *From:* [email protected] >>>> >>> <mailto:[email protected]<[email protected]> >>>> > >>>> >>> [mailto:[email protected]<[email protected]>] >>>> *On Behalf Of >>>> >>> *Drake >>>> >>> *Sent:* Thursday, June 28, 2012 6:40 PM >>>> >>> *To:* RE-wrenches >>>> >>> *Subject:* [RE-wrenches] L feet no flashing in shingle roof >>>> >>>> >>> >>>> >>> I'm quoting a job that has an existing array with L feet bolted >>>> >>> down to a shingle roof with no flashings. I want to match the >>>> >>> height of the existing array. Also some modules are being worked >>>> >>> in around skylights where it is unlikely that room would be >>>> >>> available for flashings to center over rafters. >>>> >>> >>>> >>> I've always used flashings. Would it be completely crazy to >>>> >>> follow suit of the existing array and bolt L feet straight to the >>>> >>> shingle roof with good roof sealant? If so, how would you seal it? >>>> > Drake Chamberlin >>>> > ATHENS ELECTRIC LLC >>>> > OH License 44810 >>>> > CO license 3773 >>>> > NABCEP Certified PV >>>> > >>>> ------------------------------------------------------------------------ >>>> >>>> > _______________________________________________ >>>> > List sponsored by Home Power magazine >>>> > >>>> > List Address: [email protected] >>>> > <mailto:[email protected]<[email protected]> >>>> > >>>> >>>> > >>>> > Options & settings: >>>> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>> > >>>> > List-Archive: >>>> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>>> > >>>> > List rules & etiquette: >>>> > www.re-wrenches.org/etiquette.htm >>>> > <http://www.re-wrenches.org/etiquette.htm> >>>> > >>>> > Check out participant bios: >>>> > www.members.re-wrenches.org <http://www.members.re-wrenches.org> >>>> >>>> > >>>> > >>>> > >>>> > _______________________________________________ >>>> > List sponsored by Home Power magazine >>>> > >>>> > List Address: [email protected] >>>> > >>>> > Options& settings: >>>> >>>> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>> > >>>> > List-Archive: >>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>>> > >>>> > List rules& etiquette: >>>> >>>> > www.re-wrenches.org/etiquette.htm >>>> > >>>> > Check out participant bios: >>>> > www.members.re-wrenches.org >>>> > >>>> _______________________________________________ >>>> List sponsored by Home Power magazine >>>> >>>> List Address: [email protected] >>>> >>>> Options & settings: >>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>> >>>> List-Archive: >>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>>> >>>> List rules & etiquette: >>>> www.re-wrenches.org/etiquette.htm >>>> >>>> Check out participant bios: >>>> www.members.re-wrenches.org >>>> >>>> >>>> _______________________________________________ >>>> List sponsored by Home Power magazine >>>> >>>> List Address: [email protected] >>>> >>>> Options & settings: >>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>> >>>> List-Archive: >>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>>> >>>> List rules & etiquette: >>>> www.re-wrenches.org/etiquette.htm >>>> >>>> Check out participant bios: >>>> www.members.re-wrenches.org >>>> >>>> >>>> >>> >>> >>> -- >>> Bill Hoffer PE >>> NABCEP Certified Solar PV Installer™ >>> Sunergy Engineering Services PLLC >>> 2504 Columbia Ave NW >>> East Wenatchee WA 98802-3941 >>> [email protected] Cell:(509)679-6165 >>> >>> >>> >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: [email protected] >>> >>> Options & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> >>> Check out participant bios: >>> www.members.re-wrenches.org >>> >>> >>> >> >> >> -- >> Chris Mason >> President, Comet Systems Ltd >> www.cometenergysystems.com >> Cell: 264.235.5670 >> Skype: netconcepts >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: [email protected] >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> >> > > > -- > Bill Hoffer PE > NABCEP Certified Solar PV Installer™ > Sunergy Engineering Services PLLC > 2504 Columbia Ave NW > East Wenatchee WA 98802-3941 > [email protected] Cell:(509)679-6165 > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > -- Chris Mason President, Comet Systems Ltd www.cometenergysystems.com Cell: 264.235.5670 Skype: netconcepts
_______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
