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I'm building a ROR at the moment. I'm using 150mm C section set at 500mm separations. The whole thing is mounted on "mega anchors" and about 300mm off the ground. Its all bolted together using plates you can buy from Bummers.
Framing is about done and its really solid. Not a drop of conc on site, apart from the pier. Thermal mass is going to be very low for the size of the building (9m X 4m inc warm room). I recommend you investigate this option.
Last edited by el_draco; 20-01-2017 at 10:16 AM.
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