Cement Bonded Particle Board/Structural Panel Concrete

[vtjon]

I have been continuing my research on looking into ways to build my garage on a slope with a suspended garage floor and basement. Structural slabs are not all that common in my area and they aren't very DIY-friendly.

I have run across a product called Cement Bonded Particle Board that comes in 3/4" TG 4x8 sheets. There seems to be two main manufacturers - USG's Structural Panel Concrete Subfloor and Armoroc.

Links:
https://www.usg.com/content/usgcom/...anels/structural-panel-concrete-subfloor.html
https://ameriformllc.com/armoroc.asp

Armoroc has a sample project that was a barn with a garage floor that has been covered in something (epoxy?).
https://ameriformllc.com/armoroc-project-greenzone-2013-modular-pedia-pod-armoroc-floors-2.asp

The idea would be to create a floor with cold-rolled steel joists. Although I understand that building a steel frame floor will be somewhat expensive, I would be offsetting $15-18k+ in fill and slab construction plus gaining a basement. I could put a thin layer of concrete over this floor though. USG says the MSRP is $4.50/sf which is competitive with my other choices. I don't have a nearby provider for prestressed/hollow core concrete and it would cost me $12-$15/sqft plus a 2" topper.

I've done a variety of reading on live loads, uniform loads, concentrated loads. On the USG Submittal sheet, it has a live load of 120psf (16" OC joists) which would be sufficient for a garage. I saw that it supported a concentrated load of 800lbs but I'm not sure over what area and I understand that a garage needs 2000lbs concentrated load.

Disclaimer: I will involve an engineer before I do anything. I just want to know if anybody has seen something like this and if it makes sense to pursue. My shop will not have a lift. It will be a 2 1/2 car garage that will mostly serve as a workshop. It does need to support cars for future resale and use.

 

[paredown]

Those products look pretty cool, although I have never seen them in the field.

More typical is the rolled metal section/concrete skin coat for light commercial construction, but you would probably have to find a crew familiar with that style of construction.

I too have a situation where I want to put my dream garage into a bank, but in my case, "ground" floor would be the garage, and the workshop would be the top floor. (I have a copy of the plans used by another GJ denizen xyster101 (Max) who build a similar style building that I am hanging on to.) In his case, the garage was also at ground level, so the upstairs was more like an extended loft for storage rather than usable space so it was framed conventionally.

I seem to remember a couple of other ones where they had a bilevel garage--but I can't remember what they used for between floors--worth a search.

 

[vtjon]

I saw earlier that USG also sells this same (or similar) system as a "foundation wall" that you can use in place of poured concrete walls. Now, I'm spinning with the idea of digging out for a basement, having metal stud walls with this foundation wall attached to the outside and waterproofed.

It's amazing the number of "building systems" and products out there and there seems to be an unlimited number of solutions, if you want to spend the money or take the risk.

 

[raydi]

vtjon, did you ever move forward with these panels? I've been looking for a fireproof flooring solution for one of those pre-fab, deliver on a trailer structures (which by default come with plywood), and I don't want to poor a slab.

I found this online ...
Ultimate Uniform Load for USG Structural Panel Concrete Subfloor
Joist Spacing - inches (millimeters)
12" (305 mm) / 16" (406 mm) / 24" (610 mm)
1,320 psf (63.2 kPa) / 744 psf (35.6 kPa) / 330 psf (15.8 kPa)

 

[vtjon]

No. I did not end up using this. I would had to get it engineered and procure the beams. I contacted a local distributor and it was close to the 5.50/sqft. I've moved forward with a beam and pan system for my suspended slab.

Sent from my Pixel 2 XL using Tapatalk

 

[FTG-05]

No. I did not end up using this. I would had to get it engineered and procure the beams. I contacted a local distributor and it was close to the 5.50/sqft. I've moved forward with a beam and pan system for my suspended slab.

Sent from my Pixel 2 XL using Tapatalk

I couldn't find the panels on the HD site, hence couldn't find the price. Is it realy +$240/4x8 panel?