What this detail covers
- Supporting joists (often MOW / open web) where they run perpendicular to the SIP wall.
- Blocking zones and deck build-up at the wall line.
Key steps
- Confirm joist direction and hanger specification from the engineered floor design.
- Install blocking/support pieces as shown to provide bearing and fixing zones.
- Fit deck and ensure any service penetrations (e.g., MVHR) are coordinated in the design.
Checks
- Hanger locations and fixings match the engineer’s schedule.
- Deck edge is properly supported and level.
Common mistakes
- Cutting/altering joists on site without engineer approval.
- Forgetting service penetrations until after the deck is down.
Indicative only: always follow the engineer’s fixing schedule and the project drawings.