I am looking for feedback on the attached design, as it relates to being optimized for SIP construction.

For conversations sake, the 'front' of the house is the taller wall.

For the front and back, the shorter wall would be ~10' tall and the taller wall would be ~14' tall allowing, the panels to be cut from a 24' panel without waste.

The sides, although they would require an angle cut to match the roof slope, they could also be made from a 24' piece, with two pieces made from a single cut.

The building would be 36' feet front to back, and 36' + thickness of two panels across the front. Allowing for using exactly 4' wide panels.

The roof overhang ideally would be around 2' on each side and 4' in front. Making it the flat surface 40' x 44', which could be done with little waste, although not perfect. The panels would have to run in the 44' direction, with one being at least 20' long to cover the front room (16' span) and the overhang (4'). And the other a full 24' panel to cover the central core (8'), the rear rooms (12') and the rear overhang (2').

On the interior, running across the center of the building, would be an 8' wide 'core' that housed all of the utilities for the building, splitting the living space in half. The front half would have a span of 16' + overhang and the rear half would have a span of 12'.

From what I understand of how SIPS are cut and produced, this structure would optimize SIP material and be extremely simple to build.

Any obvious ways to improve it? I know it is not the prettiest design, but please comment on it's functionality and buildability.

Thanks,
Todd

from what I know about panels, the 4' roof overhang is a stretch, expecially since the panel is running parallel to the front. You need to add some type of framing for support. The rest of the roof should have support every 8' or 10' especially with the low slope & snow load. Spans will vary with type and thickness of panels. Beams running front to back on 8' centers (+/-) would help. They would need internal support also.
Bob

Bob;

many metal based sips are capable of 4 ft cantilever overhangs and can esily span 18ft.

This image might help better describe what I am suggesting. The panels on top are 8x24 and 8x20. The longest span is the front room which is 16'. I imagine that structural splines would be used, and that the span is at the long end of managible. The 4' wide panels around that make up the wall average out to exactly 12' each, and every panel has a mate that would make up the other half of the 24' length. The center core of the building would be structural and would provide support to the roof.

tlynch;

in theory it is well optimized, you may need to add length for the roof pitch? Butt corners would need to be cut to allow for panel thickness.
No structural splines or non-structural splines needed with any of our panel systems and well within span capabilities with 6" panels.

As for the corners, I would but them one way or the other, either making it 36' x ~38.7' or ~38.75 x 36, which ever way worked better, just sticking with 4' wide panels.

We never get too hung up on getting, perfect panel layouts as it seems to stifle designs, most corner drops are utilized some place else on a job anyway. You will also end up throwing away window and door cutouts.

If the side walls were parapet walls extending up past the roof line one would not need to cut slopes in to these walls.

Jeff - I had not thought of that. It does simplify the SIP manufacturing for the walls. It does complicate the installation in the field, because the roof is no longer simply laid on top of the walls. It also wastes a triangle of material on each panel.

tlynch,

The parapet would be level across the top and the roof would slope behind it. So there would be no waste or cutting. This would give the building a clean "modern" look. One could then use door or window cut outs to make cantilevered "eyebrow" canopies over any opening on these walls giving them some functional asthetic relief.