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Solid Splines worth it?

Last Post 29 Dec 2006 12:12 AM by Goldengreg. 3 Replies.

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Goldengreg User is Offline

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Posts:5

28 Dec 2006 10:06 AM
Because of the large snow loads that I'm dealing with I'll be forced to use the sawn lumber spline configuration for my R-Control Panels. Definitely in the ceiling panels and probably in the wall panels as well. I realize that this is not ideal, but does it detract from the efficiency enough to pursue other options? I figure that the thermal bridging will be the same or less than other framing methods unless I did timber rafters with 2x decking and nailbase, but that would take a lot of time that I just don't have in my short building season. Thanks again for your input, Greg

mmacgowa

Basic Member

Posts:166

28 Dec 2006 01:28 PM
I wouldn't worry about lumber splines. If you go with nail base, it will get expensive because you will have to reinforce the decking as you would no longer have any structure in the panels and they are thinner then regular roof decking. You probably won't have issues with the walls if you go thick enough. They can transfer a lot of weight before you would need to add support. Your engineer and panel company should be able to give you the design needs.

PanelCrafters User is Offline

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Posts:680

28 Dec 2006 04:25 PM
1st of all, 1 question: Are you fabricating the panels? No, wait, 1 other question: How much does efficiency matter to you? As I stated before, in that location, I would use 8.25" SIP walls & 12.25" SIP roof. If you are still planning on using an 8.25" SIP roof, you are wasting your time, and you might as well stick frame it. Seriously. ICF's would also make a good wall, but I would add a 3.5" steel framed R-15 wall on the inside. As far as the roof is concerned, I would skip the 2x splines, and use 1 or 2 purlins on each side of the ridge beam for support.

....jc<br>If you're not building with OSB SIPS(or ICF's), why are you building?

Goldengreg User is Offline

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Posts:5

29 Dec 2006 12:12 AM
Yeah, I'll be fabricating the panels, though there won't be much fabricating at all to do, it's a really simple design. And efficiency is pretty important. I'll be doing the thicker roof panels and possibly using a glulam for a spline instead of 2x material because the panels are about 20' long and I really don't want to be in the position of trying to find 2xs that long that wouldn't be a nightmare to work with. I think I'm going to try to brainstorm some sort of purlin configuration to bring my spans down to 4' since I think the efficiency in the long run will be well worth it. Thanks again guys. Greg