Concrete Pad Details for Ground-mounting Powerwall 3 on Poured Concrete with an Existing Structural Wall
A8
In this mounting configuration, a concrete pad is constructed at the base of the existing wall capable of supporting Powerwall 3. Powerwall 3 is mounted to the wall, allowing it to be vertically supported by the concrete pad and laterally supported by the existing wall.
Note
All wall framing referenced in the
details must be part of the home's main permitted bearing wall and/or lateral force
resisting system. The contractor and their licensed design professional are responsible
for ensuring the walls, and their load transfer connections, are structurally sound to
support all code-specified vertical and lateral loading imposed by the equipment.
Note
At the contractor's expense and with no
liability to Tesla, the homeowner and contractor can work with a third party structural
designer (or other qualified person acceptable to the Authority Having Jurisdiction
(AHJ)) and the AHJ to develop alternative supports.
Concrete Pad Size
| Number of Units | Pad Width | Pad Length |
|---|---|---|
| 1 Powerwall 3 | 16 in (406 mm) | 34 in (864 mm) |
Concrete Pad Requirements
- Within the perimeter of the pad, excavate and remove all loose and organic material, compacting soil to a level surface. Embed the concrete in the soil per detail (below). Should AHJs require further embedment of footing, contractors shall consult a third party structural designer or other qualified person acceptable to the AHJ to abide by the requirements set by the AHJ. Compact and fill a 4-inch thick base of crushed, course stone when 10PSF or more ground snow load is expected in site-specific design criteria
- Concrete used for pads shall have a minimum compressive strength of 3,000 PSI at 28 days. Work can begin 14 days after the pad is poured
- Concrete reinforcing shall
meet the temperature and shrinkage requirements of ACI 318
- #4 Rebars <=10 inch O.C. (both ways)
- ASTM A615 Grade 60 (FY = 60,000 PSI)
- Minimum 3 inch cover for concrete facing soil
A9 - Concrete Pad Details for Ground-mounting Powerwall 3 on Poured Concrete with an Existing Structural Wall
