Lateral soil load?
I’m planning on using lightweight aggregate ( expanded clay/shale) as back-fill. This material has several benefits, it is about 10 times better insulation than other drainage mediums ( r 1/in to r2/in depending on density and moisture content) , it exerts about 60% of the lateral load of more conventional granular drainage materials it is also drains about 10 times faster. The disadvantage is it is more costly. Much of the cost could be recovered if the structure’s design were ” lightened” recognizing the lower lateral load. Is there a way the design values in the code can recognize the lower lateral load and allow a design based upon it?
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