Detached Two-Story ADU

Full structural package for a new two-story detached ADU (265 sq ft per floor): foundation, floor and roof framing, shear walls and connection details.

Scope of work

  • Foundation, floor joist and roof framing design
  • Shear wall layout and schedule (2x4 DF-L studs at 16" O.C., 5/8" gypsum, 8d nails at 6" edge / 12" field, R-19 insulation)
  • Beam and post sizing
  • Lateral analysis for wind and seismic loads
  • Connection details and wall elevations for both floors

Drawings & calculations

7 sheets from the project — click any sheet to view it full size.