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a Interpolation allowed.Extrapolation is not allowed. <br /> b.Reserved. <br /> a Footing dimensions shall allow complete bearing of the post. <br /> d.If the support is a brick or CMU pier,the footing shall have a minimum 2-inch projection on all sides. <br /> a Area,in square feet,of deck surface supported by post and footings <br /> f.Minimum thickness shall only apply to plain concrete footings. <br /> R507.3.2 Minimum Depth <br /> Deck footings shall extend below the frost line specified in Table R301.2(1)in accordance with Section R403.1.4.1. <br /> Exceptions: • <br /> 1.Free-standing decks that meet all of the following criteria: <br /> 1.1.The joists bear directly on precast concrete pier blocks at grade without support by beams or posts, <br /> 1.2.The area of the deck does not exceed 200 square feet(18.9 m2). <br /> 1.3.The walking surface is not more than 20 inches(616 mm)above grade at any point within 36 inches <br /> (914 mm)measured horizontally from the edge. <br /> 2. Free-standing decks need not be provided with footings that extend below the frost line. <br /> R507.4 Deck Posts <br /> For single-level decks,wood post size shall be in accordance with Table R507.4. <br /> TABLE R507.4 <br /> DECK POST HEIGHTa <br /> � � I <br />