780 CMR, CHAPTER 51, ch. R4, R404.1
Backfill shall not be placed against the wall until the wall has sufficient strength and has been anchored to the floor above, or has been sufficiently braced to prevent damage by the backfill. Backfill material shall be free draining and free of organic materials, construction debris (including wood scraps), cobbles and boulders, shall be placed in lifts not exceeding 12 inches in thickness and shall be mechanically compacted. Foundation walls shall be properly braced prior to the setting of a manufactured building.
Notes
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