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Wood Cement Fiber Roof Planks with deformed bar reinforcement

Wood Cement Fiber Roof Planks with deformed bar reinforcement

Wood Cement Fiber Roof Planks with deformed bar reinforcement

(OP)
I'm evaluating an old warehouse building that has 2' wide, wood cement fiber planks that span about 7' between steel support beams. The planks are about 3-1/4" thick and appear to have #5 embedded reinforcement along each edge. I'm wondering if anyone knows what this system is and if so, do they have any documentation and/or load tables. Although it's similar to tectum or petrical, I'm not aware of either system having internal reinforcement. I also don't think it's porex or insulrock. I've attached a photo of the system. The building is located in NJ and my best guess is it's from the 60's/70's era. Any help would be appreciated.

At the same facility, there is also a roof section that has 2" tectum/petrical supported from below by cold formed box purlins with a continuous slot at the top. If anyone has information on the box purlin system or the fasteners, it would be appreciated. I've attached a photo of this also. There was a 2009 post of a building in Buffalo that had the same system. You can see the box purlin profile in the photo where they infilled an old opening with metal deck - they obviously didn't reinforce the support around the opening. The box shape is 2-3/8" in height by 1-7/8" in width and is only about 16 gauge. 7' spans with 2'-8" spacing.

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