Replies

1. 
   coonass | May 28, 2002 12:47am | #1

   Iron,

   Here is site but manufacturer should be your source of info.

   http://www.sips.org/

   KK

1. 
   IronHelix | May 28, 2002 03:49am | #2

   thanks.............i will take a look.

                           my client is also to receive a fax of installation details.

                          

   ..............................Iron Helix

                          

1. 
   JasonMI | May 28, 2002 02:33pm | #3

   To me it's simple...if you have a construction detail question regarding the SIPS, call the company that made them and talk to the designer/engineer. They should be able to give you, off the top of their head, the maximum overhang amount. Obviously it differs depending on the walls, size, pitch, etc...but I'm guessing that you're covered from 18-24" without any problem (but check with the company first). Also...isn't this detailed on the drawings?

1. 
   IronHelix | May 29, 2002 04:46am | #4

   The only drawings provided were for the M&T cuts on the timbers and the layout plan for the completed timber(only) structure.  No other details.

   My clients request to the company for an answer to the question I posed on BT was 15 pages of span load, axial shear loads, and other engineering data that could be used in calculating a number of "things" if we had an appropriate formula for the circumstances concerning SIP's.

   Apparently the timber frame company is a jobber for the SIP's products.   So my client is still attempting to collect the info from the timberframe company.  I was needing to proceed with  final designs, materials lists and cost estimates, and hoped that someone within BT might have what I needed.

   The client wants 24"OH on the gable ends and 48" OH on the eaves.  My gut says 48" is out of the question without some additional support system and the 24" is marginal at best................????

   Thanks for the imput Jason.

   I'll keep digging...................................................Iron Helix

1. 
   JasonMI | May 29, 2002 02:29pm | #5

   24 and 48" overhangs? Er...with support of some kind, I hope! Guess it also might depend on loads (snow, wind, etc.), and pitch. Let me dig out my manual (for the company I get SIPs from), and see if it has anything...

2. 
   JasonMI | May 30, 2002 12:54am | #6

   Okay, so I got out my R-Control construction manual, and it has a couple interesting things in it. The first is details for adding dimensional lumber rakes and eaves. The eaves in particular are an "outcropping" or extension of the I joists, dimensional lumber, or header material that are used as roof splines. That's one way.

   According to the manual, you can also use the panels themselves as overhangs, as long as the following conditions are met: up to 2' of overhang seems to be fine (remember, I'm a hammer swinger trying to read a technical bulletin), as long as those are the panels specced for the roof. Overhangs of up to 4' can be made as long as an assembly of doubled-splines is used to support the loads. Finally, there's a big note that says "In all cases of overhangs greater than 2', the panels which make up the overhang must have a continuous backspan of 2x the overhang length (e.g., a 4' overhang must have an 8' backspan, utilizing a 12' panel)." The backspan of the roof panel used in this configuration must be designed (I assume height-wise, fastener-wise, etc.), to carry the overhang load.

   So from that, I gather it can be done...but it sounds like they want it designed. I'd suggest you check out these documents yourself (because I don't want to bum-steer you with my lack of engineering knowledge). Go to http://www.r-control.com, click on Technical, fill out the little sheet, and you can view all of this online. You want to look at ridge and eave detail sheets, and at technical bulletin #2029 from AFM Corporation.

   Hope this helps.

3. 
   IronHelix | May 30, 2002 01:41am | #7

   OUTSTANDING !!!

   thanks again,Jason

   I'll be back after I get lost in the technical stuff...........

   .......................Iron Helix