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Prescriptive Residential Wood Deck Construction Guide -Appendix A5 <br /> Table B2. Post Heights Based" on Tributary Area for Center Posts. <br /> 6x6 Post Height(ft.) 4x4 Post Height(ft.) <br /> 0 c s- ;o C C 03 C <br /> '1.7 E co E g a <br /> E.F3.4 2 2 LLo 3 °'73 yam 6 iso L� N Ct/ 3 °8 tLL <br /> l. <br /> --. O -, I OC 0 Gi ® � Z C) C O et. ai <br /> .L <br /> 0 ® O. c 0 <br /> 1— u) o. N a <br /> 10 14 14 14 14 14 14 14 14 14 14 <br /> 20 14 14 14 14 14 14 14 14 14 14 <br /> 30 14 14 14 14 14 14 14 13 13 14 <br /> 40 14 14 14 14 14 13 14 11 11 12 <br /> 50 14 14 14 14 14 11 12 10 10 10 <br /> 60 14 14 14 14 14 10 11 10 9 10 <br /> 70 14 14 14 14 14 9 10 9 8 9 <br /> 80 14 14 14 14 14 9 9 8 7 8 <br /> 90 14 14 14 14 14 8 9 7 7 7 <br /> 100 14 14 14 14 14 8 8 7 7 7 <br /> 110 14 14 14 14 14 7 8 6 6 6 <br /> 120 14 14 14 14 14 7 7 6 6 6 <br /> 130 14 14 14 14 13 6 7 5 6 6 <br /> 140 14 14 13 14 11 6 7 5 5 5 <br /> 150 14 14 13 14 10 6 6 5 5 5 <br /> 160 14 14 12 13 8 6 6 5 5 5 <br /> 170 14 14 11 13 6 5 6 4 4 5 <br /> 180 14 14 11 12 NP 5 6 4 4 4 <br /> 190 13 13 11 12 NP 5 5 4 4 4 <br /> 200 13 13 10 11 NP 4 5 3 4 4 <br /> 210 12 12 , 8 11 NP 4 5 3 3 3 <br /> 220 12 11 8 10 NP 4 5 2 3 . 3 <br /> 230. 11 11 7 10 NP 4 4 2 3 2 <br /> 240 10 10 6 10 NP 3 4 NP 2 2 <br /> 250 10 10 5 9 NP 3 4 NP 1 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 /> 4. Tributary area shall be multiplied by 1.25 at center posts with beams not spliced <br /> (continuous). <br /> >V3 6 <br /> I,AJ41AL American Wood Council <br />