FOUNDATION CHECKLIST FOR BUILDING IN EXPANSIVE SOILS

(Recommended Guidelines to Help Assure Trouble-Free Foundations)

Footing Inspection

  1. Review & verify soils report for foundation type and design.
  2. Schedule open hole inspection by Soils Engineer as required.
  3. Soil exposed within forms is free of loose soil, soft spots, wet spots and frost.
  4. Footing width, depth and layout matches foundation plan
  5. Pad width, depth and layout matches foundation plan.
  6. Reinforcing steel is the proper size and grade.
         Size: _____ Grade: _____
  7. Reinforcing steel has required clearances to The sides, top and bottom of forms.
  8. Reinforcing steel Is free of all dirt, oil, millscale. rust, etc.
  9. Lap splices of reinforcing steel are the required length.
  10. keyways or dowels are properly installed.

Drilled Pier Inspection

  1. Review & verify soils report for foundation type and design.
  2. Conditions encountered in pier holes match anticipated conditions indicated in soils report.
  3. Pier diameter matches diameter required by foundation plan.
  4. Pier length and embedment are as per foundation plan.
         Length: _____ Embedment: _____
  5. 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.)
  6. Pier shaft is plumb. or within tolerances.
  7. Reinforcing steel Is the proper size and grade.
         Grade: _____ Size: _____
  8. Reinforcing steel Is free of all dirt, oil, millscale, rust, etc.
  9. Lap splices for reinforcing steel are the required length and are located at bottom of pier.
  10. Ties are installed as indicated on the foundation plan.
  11. Bottom of pier holes are clean.
  12. Sides of pier holes are straight, and no caving has occurred.
  13. If ground water is encountered at the bottom of the pier shaft, consult soils engineer or soils report.
  14. Reinforcing steel has proper projection above pier top as indicated on plan.

Wall Steel Inspection

  1. Alignment of wall on piers/ footings within tolerances.
  2. WallVoid® depth conforms to the foundation specifications.
  3. WallVoid® is kept dry prior to and throughout product installation.
  4. Wall width, height and layout matches foundation plan.
  5. Reinforcing steel has been properly tied.
  6. Reinforcing steel is the proper size and grade.
         Size: _____ Grade: _____
         Vertical steel placed at _____ in. o.c. Horizontal steel placed as per plan.
  7. Reinforcing steel has required clearances from the sides, top and bottom of forms.
  8. Reinforcing steel is free of all dirt, oil, millscale, rust, etc.
  9. Lap splices for reinforcing steel are the required length.
  10. 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.
  11. Reinforcing steel has been placed around openings, beam pockets, brick ledges and step downs as Indicated on the foundation plans.
  12. Anchor bolts to be installed per plan.

Foundation Drain

  1. Verify specifications by engineer on site.
  2. 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.
  3. Drain pipe meets specifications and follows slope of the trench.
  4. Bedding material is clean and free of loose soil or silt. Meets quantity specifications.
  5. Paper or fabric cover is in place per specs.
  6. 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

  1. 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.
  2. Interior non-load bearing partitions are constructed with the minimum void space between bottom of wall and floor.
  3. Flexible connection between furnace and ductwork and all service lines allow for a minimum of vertical slab movement per soils report.
  4. Sewer line or vent lines and other utilities passing through the slab are isolated using SureVoid Pipe Wrap.
  5. 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.
  6. Slab to be separated from foundation and interior columns. Control joints to be scored in slab as recommended by engineer.

Final Grade

  1. 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.
  2. 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.
  3. All exterior concrete slabs will be properly sloped to drain water away from the foundation. Non-uniform slope and/or obstructions are not permitted.
  4. 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.