Building codes regulating soil condition vary, usually dependent upon the type of soil that is predominant in a community. BUILDING A FLOATING DECK: WHAT YOU NEED TO KNOW. Extended backer board  below rim joist. Your local building official (or his secretery) will have this number on the tip of their tongue because it is asked so often. Find out how deep you need to dig your footings in your area. For SI: 1 inch = 25.4, 1 foot = 304.8 mm Attachment interpolation between 8 foot … During your planning stage, don’t forget to consider the spacing for your beams. Which one you choose will depend on the size and height of your deck and the building codes in your location. Connection Diagrams:   FIVE DIFFERENT TECHNIQUES. For more information on how and where to obtain your building permit, call or visit the Residential Office 8320-130 Litchford Road, … We will teach you how to determine the code compliant size of your footings based on the soil type and tributary loads. Minimum 36 ”at all points above the permitted handrail height, Minimum 31.5 "width below handrail height where handrail is on one side, Minimum 27 "width below handrail where handrails are on both sides, Maximum rise of 7-3 / 4 ”- maximum difference among risers 3/8", Minimum tread width of 10 "- maximum difference among treads 3/8". Codes don’t, however, tell how to dig a proper footing hole. Footings are to be dug straight. Check with the building department for specific depths required. Deck Post per AM108 Footers per Table AM102.1. 7. Poured concrete footings, buried post footings, precast cement footings, deck blocks, and screw/helical piles are all viable options for deck footings. Part 3 of 4: Installing the Forms. Step by step explanation ! Tutorials, Calculators, and Building Codes. Ledger board width must be => deck joist width but = deck joist width solution for your project does not extend into those areas most intensive... 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