OK, you might think I'm crazy, but I have worked out a plan to make an ICF A-frame.
Here is my idea:

Make the concrete slab base.

Use standard Buildblock 8" wall pieces with the bottom row cut with a 65 degree chamfer.

First floor:
Build 2 rows to 3 feet, brace and poor the concrete. Let set for 4 hours. Build another row to 6 feet, brace, pour and set 4 hours. Build another row to 9 feet and let set overnight.

Second floor:
Repeat above procedure until the ICF forms meet at the top.

Still working out the Apex design, but will finish where the two walls are joined monolithically.

Any helpful comments, design ideas?

I'd think it'd be simpler (and cheaper) to use something like QuadDeck in a tilt-up-panel arrangement.

Build the thing as panels and include exterior insulation and a nailing surface for the actual roofing materials.

Your way would be extremely labor intensive and may not actually pass code for structural reasons.

Thanks for the input. I will look at that.

I agree, regular ICF block is great for building upright walls with insulation in place. I think if I had my heart set on a concrete "A" frame, I would also consider tilt-up. Quad deck talks about spans up to 34' you could probably fab pieces that would span from foundation to peak in a single piece. Openings and lift points would of course need to be planned and engineered carefully as well as tie in for the floor attachment if you wish to incorporate that into the shell. A support structure to hold 2 opposing pieces in place until the top could be tied together would also need to be worked out. Beyond that I guess you would only be limited on what kind of crane you can get on site within it's weight/reach limits. This would also determine how wide a panel you could swing into place...

In the end, our advice here is nice. But DEFINITELY talk to a structural engineer.

+1, Something like this WILL need substantial engineering input...

Awesome input guys...I'm looking at the quad deck. Was hoping for a monolithic structure, but will probably settle for simplicity. Figuring out a one 12" row on the sides and then joining to the quad deck.

Spans are short enough with each quad deck about 23' x 33'.

Plan is evolving to:

1. Build the level slab.
2. Use the slab to form each quad deck one at a time.
3. Build the rear wall, ICF to the apex and one wide strong row on each side.
4. Build a front apex support (working out materials).
5. Drop the quad decks on each side (cranes)
6. Final pour over apex and side to join the rebar joints.

I'm an engineer, so will make sure calculations work. Looking for the practical real world experience and you guys have helped me.

Thanks.

Another option to the tilt-up/drop-in method.

Look at pouring the quad deck to simply turn the main structure into a concrete "box". Albeit one with a high-pitch roof.
Then, to complete the A-frame profile, add the eaves/overhang as semi-cosmetic feature.
Or, if your A-frame roof is doubling as wall-space all the way down to the ground, you don't really need eaves.

You wind up with a roof structure that can be cosmetically damaged (by losing the nailing structure) without actually compromising the physical structure of the building.

Was hoping for a monolithic structure, but will probably settle for simplicity

SCIP makes sense to me.

Posted By dukebowling on 10 May 2017 07:25 PM
Was hoping for a monolithic structure, but will probably settle for simplicity.

Depending on how you're structuring, something like QuadDeck CAN get you to a monolithic structure.

Tilt-up might be simpler, a lot of it depends on the design and how flexible you are with said design.

If you're looking at an A-frame that's mostly wall structure and no "eaves", a pour-in-place setup with stepped fill points could make a lot of sense.
You just need to provide structural tie-backs for the roofing surface back into the concrete/rebar system.  You can even add rigid insulation over the surface to complete the insulation envelope.

Build the "box" for the roof surface, and leave ever other (or every third) row of plywood uncaulked/sealed/adhesived so they can be removed to provide a fill point.
Then fill the roof structure to just below the top of the panel below it.
Then caulk/seal/adhesive the row of panels back into place and screw them down.
Then fill from further up.

Tilt up. Not worth the grey hair to do it any other way.

Curious if you ever completed this project and if you have anything to share about building it? What worked well, were there any complications...?