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A4 Prescriptive Residential Wood Deck Construction Guide—Appendix <br /> Table B1. Post Heights Based" on Tributary Area for Corner Posts. <br /> 6x6 Post Height (ft.) 4x4 Post Height (ft.) <br /> co c ,t. CI c c . as c <br /> 'o. is t. c N IS H c. b- ii if E Q eg H o. <br /> t.= c w �, i; 2 � 3 a� 0 a E L u H co 3 ag o. <br /> to $' ,� rg ca E �, 4) 0 c >r u> .c OCDi 0 m a� 'a c lY u) <br /> ,Q " = 0 X - V Et o ai 5 0 = - V ce O ai <br /> 0 O.. c p ® d o <br /> I- u) a. "a <br /> 10 14 14 14 14 14 9 7 7 11 8 <br /> 20 14 14 14 14 14 6 4 5 7 5 <br /> 30 14 14 14 14 14 5 3 4 6 4 <br /> 40 14 14 14 14 14 4 3 3 5 3 <br /> 50 14 14 14 14 14 4 2 3 4 3 <br /> 60 14 14 14 14 14 3 2 2 4 2 <br /> 70 14 14 14 14 13 3 2 2 3 2 <br /> 80 14 14 13 14 12 2 2 2 3 2 <br /> 90 14 14 12 14 10 2 2 2 2 2 <br /> 100 14 14 11 13 9 2 2 2 2 2 <br /> 110 14 13 10 12 7 2 2 2 2 2 , <br /> 120 13 12 10 12 6 2 2 2 2 2 <br /> 130 13 11 9 11 4 2 2 2 2 2 <br /> 140 12 11 8 10 2 2 2 2 2 2 <br /> 150 11 10 7 10 2 2 2 2 2 2 <br /> 160 11 9 6 9 2 2 2 2 2 2 <br /> 170 10 9 5 9 NP 2 2 2 2 2 <br /> 180 10 8 3 9 NP 2 2 2 2 2 <br /> 190 10 7 2 8 NP 2 2 2 2 2 <br /> 200 8 7 2 8 NP 2 2 2 2 2 <br /> 210 8 6 2 7 NP 2 2 2 2 2 <br /> 220 7 5 2 7 NP 2 2 2 2 2 <br /> 230 6 4 2 7 , N P 2 2 2 2 2 , <br /> 240 6 2 2 6 NP 2 2 NP 2 2 <br /> 250 5 2 2 6 NP 2 2 NP NP NP <br /> 1.Assumes No 2. Stress grade and wet service conditions. <br /> 2. Incising assumed for Douglas fir-larch, hem-fir, and spruce-pine-fir. <br /> 3. Some post heights for 4x4 post sizes show a greater load carrying capacity than 6x6 <br /> post sizes since different ASTM Standards are used to develop design values for visually <br /> graded dimension lumber vs. visually graded timbers. <br /> 2, s-a <br /> American Wood Council <br />