PRELIMINARY WALL ASSEMBLIES
The building will be using rammed earth for the primary structural walls. The wall section is fairly simple, consisting of two wythes of 7 inch thick rammed earth with 4 inches of rigid extruded insulation in the middle to increase the R-value, and resting on a 3 foot deep continuous concrete footing. The two wythes will be held together with steel reinforcements and tie bars. The connection of the rammed earth to the roof is a 6 inch deep concrete bond beam that then has top plates on top of it that the wood roof trusses will connect to.
The walls of the storm shelter and the walls that are backed with earth will be 8 inch concrete retaining walls. There is 2 inches of extruded rigid insulation behind them to insulate the space. To maintain the aesthetics of the rammed earth walls, the interior of the concrete walls has 3 inch panels of the prefabricated rammed earth attached to them via metal furring.
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