![]() In most cases, that means 24” holes with a width of 9”. The depth of the holes should match regional building codes pertaining to the frost line. Use an auger to dig two post holes per row, each hole 8’ apart. The easiest way to build a freestanding pergola is to start with post holes. … harbor freight shop vac Step 1 – Installing the Posts. Joists, girders, and posts may be required Built well, a pergola's a very pleasant thing - but if you're in a bushfire or cyclone prone area, you'll need to build it in a way that ensures it's not increasing the risk of damage to your home. The concrete mix for footings must meet a compressive strength of f’c= 2,500 psi minimum. ![]() CONSTRUCTION SPECIFICATIONS Following are the minimum construction specifications for patio covers. Fill soils that support footings and foundations shall be designed, installed and tested in accordance with accepted engineering practice. R401.2 Requirements Foundation construction shall be capable of accommodating all loads in accordance with Section R301 and of transmitting the resulting loads to the supporting soil.
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