My house design will be:
1. 10" SIP (Insulspan) roof with SIP trimming/splines (longer side) running perpindicular to slope/pitch for spanning strength.
2. Standing seam metal (unknown if aluminum or painted steel or galvanized) roof. I haven't decided whether it will be furred over the SIP's OSB, yet (too many arguments to sort through right now).
3. There is no truss supporting this roof, which is basically a shed style that is ~24'W x 36'L pitched about ~15 degrees. The sides are supported by SIP walls and the center longitudinal spline (of roof, not SIP per se) is post and beam (glulam/lvl) support.


If I want to install a PhotoVoltaic array (that mayb cover at least 75% of roof area) with normally associated hardware (i.e. Whatever aluminum structure/framing...), what are the options available to design to?

I'd like to minimize the roof fastening points as much as possible... basically have the panel's weight carried by the array's substructure of aluminum, which is fastened to the roof at various legs (minimized as much as possible) for the structure... rather than legs for each PV panel.

I had a thought of using thick bar stock (metal) held in between the SIP's spline components (which are currently dimensional lumber). The dimensional lumber splines would have to have some manner of minor routing to accommodate the thickness of the metal bar stock that would eventually hold the leg structure of the array.

http://www.imagestation.com/8492224/3938009916