(A) Floor joists shall have a clearance of not less than 12 inches between the bottom of the joist and the surface of the ground underneath. All sod or soil containing organic matter must be removed from beneath the building. Proper ventilation must be provided.
(B) Wood sheathing, when laid diagonally on exterior walls, shall be applied at approximately 45 degrees and extend in opposite directions on each side adjoining at the corner, and corner bracing will not be required.
(C) In all cases, except where diagonal wood sheathing is used, all external corners shall have diagonal 1 x 4-inch braces set into the outside or inside face of the studs at approximately 45 degrees and, wherever possible, shall extend from sill to plate.
(1992 Code, § 7-42)