FOUNDATION CHECKLIST FOR BUILDING IN EXPANSIVE SOILS
(Recommended Guidelines to Help Assure Trouble-Free Foundations)
Footing Inspection
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Review & verify soils report for foundation type and design.
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Schedule open hole inspection by Soils Engineer as required.
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Soil exposed within forms is free of loose soil, soft spots, wet spots and frost.
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Footing width, depth and layout matches foundation plan
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Pad width, depth and layout matches foundation plan.
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Reinforcing steel is the proper size and grade.
Size: _____ Grade: _____
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Reinforcing steel has required clearances to The sides, top and bottom of forms.
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Reinforcing steel Is free of all dirt, oil, millscale. rust, etc.
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Lap splices of reinforcing steel are the required length.
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keyways or dowels are properly installed.
Drilled Pier Inspection
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Review & verify soils report for foundation type and design.
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Conditions encountered in pier holes match anticipated conditions indicated in soils report.
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Pier diameter matches diameter required by foundation plan.
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Pier length and embedment are as per foundation plan.
Length: _____ Embedment: _____
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Tops of piers are round and the same size as the rest of the shaft, using Commercial SureTops™ to ensure that there are no mushroomed tops. (Commercial SureTops™ are the easy, economical answers to accurately form tops of poured-in-place concrete piers.)
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Pier shaft is plumb. or within tolerances.
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Reinforcing steel Is the proper size and grade.
Grade: _____ Size: _____
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Reinforcing steel Is free of all dirt, oil, millscale, rust, etc.
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Lap splices for reinforcing steel are the required length and are located at bottom of pier.
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Ties are installed as indicated on the foundation plan.
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Bottom of pier holes are clean.
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Sides of pier holes are straight, and no caving has occurred.
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If ground water is encountered at the bottom of the pier shaft, consult soils engineer or soils report.
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Reinforcing steel has proper projection above pier top as indicated on plan.
Wall Steel Inspection
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Alignment of wall on piers/ footings within tolerances.
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WallVoid® depth conforms to the foundation specifications.
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WallVoid® is kept dry prior to and throughout product installation.
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Wall width, height and layout matches foundation plan.
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Reinforcing steel has been properly tied.
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Reinforcing steel is the proper size and grade.
Size: _____ Grade: _____
Vertical steel placed at _____ in. o.c. Horizontal steel placed as per plan.
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Reinforcing steel has required clearances from the sides, top and bottom of forms.
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Reinforcing steel is free of all dirt, oil, millscale, rust, etc.
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Lap splices for reinforcing steel are the required length.
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Beam pockets and window bucks are located as indicated on the foundation plan. Additionally, beam pockets and other blockout areas should be formed using an appropriate blockout.
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Reinforcing steel has been placed around openings, beam pockets, brick ledges and step downs as Indicated on the foundation plans.
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Anchor bolts to be installed per plan.
Foundation Drain
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Verify specifications by engineer on site.
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Drain trench size meets specifications and slopes minimum 1/8th inch per foot to discharge point from high point. Depth of pipe to be completely below bottom of slab elevation.
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Drain pipe meets specifications and follows slope of the trench.
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Bedding material is clean and free of loose soil or silt. Meets quantity specifications.
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Paper or fabric cover is in place per specs.
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Discharge to suitable outfall - subdivision under- drain, "daylight" or sump pit. Verify elevation top of sump in relation to floor drain.
"Floating" Slab or Partition Framing
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Stairs to basement slab areas are floated by a hinged connection to the first floor joist, and rest with no connection on the slab. Or are suspended from the first subfloor.
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Interior non-load bearing partitions are constructed with the minimum void space between bottom of wall and floor.
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Flexible connection between furnace and ductwork and all service lines allow for a minimum of vertical slab movement per soils report.
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Sewer line or vent lines and other utilities passing through the slab are isolated using SureVoid Pipe Wrap.
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Interior column support shall be provided by adjustable steel monopost that is properly isolated from the slab, using SureVoid Column Wrap. A minimum of one (1) inch and a maximum of three (3) inches of vertical adjustment shall be possible.
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Slab to be separated from foundation and interior columns. Control joints to be scored in slab as recommended by engineer.
Final Grade
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Minimum uniform slope away from the foundation of 10% for the first 10 feet, or as per soils report and Lot or Subdivision Grading and Drainage plans.
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Drainage of the lot and surrounding property shall be sufficient to prevent ponding of excessive runoff adjacent to the foundation. Subdivision grading will be in accordance with approved plan.
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All exterior concrete slabs will be properly sloped to drain water away from the foundation. Non-uniform slope and/or obstructions are not permitted.
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Rain gutters, downspouts and splash blocks properly installed.
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NOTE: This information is provided for general education only. For detailed information concerning reactive soils, you should always contact a geotechnical firm.