Garage-to-ADU Conversion with Connection Details

Structural conversion of an existing attached garage to a code-compliant ADU, with a new ceiling joist system tied to the existing roof framing.

Scope of work

  • New ceiling joist system: 2×6 @ 16" O.C. with Simpson A35 blocking and H2.5A ties to existing rafters
  • Reinforcement of existing framing; field-verification notes for existing conditions
  • 1-hr fire-rated interior and exterior wall sections per UL U465
  • Top plate splice details with ST6224 straps and a typical structural detail sheet

Drawings & calculations

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