N.H. Admin. Code § Inst 603.08 - Perimeter Blocking
Supports shall be on both sides of side wall exterior doors and other side wall openings greater than 48 inches and under porch posts, factory installed fireplaces and wood stoves, unless not required by the manufacturer.
Notes
#8494, eff 12-24-05; ss by #10155, eff 4-14-12
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