![]() Driven steel pile foundations are a good alternative that has been used successfully even for very large reciprocating compressor packages. Conventional concrete block foundations provide a reliable design, but the cost can be significant. Good choice very easy to handle sturdy long-term results unknown. A sound foundation is a key factor in a successful reciprocating compressor application. We easily trimmed the block verticals to fit cross-pieces between closely-spaced joist "ladders". Note that the spacing on the blocks is different in each direction.number 1 is for 1 1/2 inch lumber. Span tables say a 2 x 6 can span up to 7 feet seven inches. Empirical design is often used to design concrete masonry foundation walls due to its simplicity and history of successful performance. Table 1 lists the allowable backfill heights for 8, 10 and 12-inch (203, 254 and 305 mm) concrete masonry foundation walls. ![]() We spaced the blocks four feet or less apart. Empirical design is often used to design concrete masonry foundation walls due to its simplicity and history of successful performance. Unknown if any of the bases will settle, however it's a pool deck at ground level. At the far end, we had to add a 2 x 6 post a few inches high. We built the rim joist first and leveled from the retaining wall to the rim joist. 1.1 Block Foundations For the machines on block foundations, it is good enough to use simple formulations (which are equations of motion considering block as a rigid body supported on an elastic medium, i.e., soil). After trying the joist, a bit of adjusting was required. ![]() ![]() Most of the joists attached to the wood retaining wall surrounding the pool and the best practice seemed to be establishing the height of the joist based on the retaining wall and height of the pool (we wanted to be just below the pool rim), then placing the first base and leveling each subsequent base therefrom. We place 1-3 inches of tamped paver base at each location requiring one-half to one bag of gravel each. Great alternative to concrete block! Just finished a 30 x 40 ground-level deck around an above-ground pool. A sound foundation is a key factor in a successful reciprocating compressor application. ![]()
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