Helical Piles - Helical piles, also knows as screw-piles, are permitted in accordance with manufacturer’s instructions.These pin style footings are only permitted for decks and will not allow the deck to be converted to a porch in the future unless specifically permitted by the manufacturer. Non-Concrete Manufactured Pin Style Footings – The permit holder is responsible for the design size, and the Base Area Comparison must be equal to or greater than concrete footing diameter listed in the City of Blaine Deck Handout footing guide.The footing inspection will fail if suitable soils cannot be verified, and soil corrections and/or deck footings must be designed by a licensed professional engineer. In some developments, the depth to suitable soil may be much deeper than the 42 inch frost depth. In lieu of using this table, another option is to provide an engineer’s soil report to verify minimum bearing capacity, and design them accordingly.įootings must still be set on sandy/suitable soils (no black organic type soils) or the footing inspection will fail. Concrete Footings – The permit holder is responsible for the design size, but the footings cannot be a smaller diameter than listed in the Minimum Deck Footing Size Table above.Please call the Blaine Building Department for soil information in your development at 76 as the first step in planning a deck or porch. Note: Areas of known poor soils require soils corrections and/or deck footings must be designed by a licensed professional engineer prior to the issuance of the permit.
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