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...(MyBui Ldi ngPermit.com <br /> a service of eCityGov.net Construction Tip Sheet 05 <br /> Maximum Deck Post Height <br /> Tributary Area d 6.25 si 0' <br /> Post Size 6.0. 40 60 80 100 120 140 160 <br /> b,c <br /> Maximum Deck Post Height a,°(feet-inches) <br /> 4x4 10-0 8-7 7-0 5-8 4-1 NP NP <br /> 4x6 14-0 13-10 11-1 9-5 8-2 7-3 6-4 5-4 <br /> 6x6 14-0 14-0 14-0 14-0 14-0 ' 13-3 10-9 6-11 <br /> 8x8 14-0 14-0 14-0 14-0 14-0 14-0 14-0 14-0 <br /> a. Measured from the underside of the beam to top of footing. <br /> b. Based on Doug Fir, Hem Fir and Spruce-Pine-Fir, Number 2 grade, wet service factor. <br /> c. Includes incising factor. <br /> d. Area, in square feet, of deck surface supported by post and footing. <br /> e. For fire-retardant-treated wood (exterior grade), follow the manufacturer's height specifications. <br /> Footing Size a <br /> Tributary Area b Side of Square Diameter of Round Thickness (inches) <br /> Footing (inches) Footing (inches) <br /> 5 7 8 6 <br /> C�2-5-sa,,YZ C-2"0-7) C 12- ',) K14) 6 <br /> 40 18 20 6 <br /> 60 21 24 8 <br /> • 80 25 28 9 <br /> 100 28 31 11 <br /> 120 30 34 12 <br /> 140 33 37 13 <br /> 160 35 40 15 <br /> a. Footing dimensions shall allow complete bearing of the post. <br /> b. Area, in square feet, of deck surface supported by post and footings. <br /> 12"min.frost depth <br /> In allowable soils Manufactured post inferctor Typical P.T.post <br /> 12" n <br /> Grade ` t1 �', 'e • <br /> m= ii—ii�—iii— tip—Sr—�i— . : ii� n — — :/_,,,_, <br /> t—I <br /> -111 =II I-III-111i -III-III:- ..14 • 1-II-11 .': . ,I I „III-III ;III-111 111 • • I-11 <br /> Thickness •4' "a ; <br /> por Table L;• . _ . • ' " -. al `,: <br /> Note:Posts must be I Width I 1/2" iameter"` <br /> I` per —mot' through-bolts in both <br /> centered on or In footing Table directions 4"gravel Min. 12"of <br /> Note:not screws embedment <br /> May 29,2024 MyBuildingPermit.com I Basic Deck 4 <br /> /t <br /> eCityGov.net <br /> 2005.E aCliyGGIAGence <br />