Every rule your project must meet, found for you.
Search Northern Ireland’s planning and building-control guidance, ask a question in plain English, or generate a project compliance checklist — every answer cited to the source.
Working to a specific project? Generate a compliance checklist →
Answers, with citations
Ask in plain English and get an answer that links to the exact source clause — never an unsourced guess.
Scoped to your council
Overlay a council's local development plan on the Northern Ireland-wide regulations and policy.
Project compliance checklist
Characterise a project and get the requirements that apply, grouped by work area. Try it →
The library
Search the source guidance
2 results · filtered
Limitations for notches and holes in floor and roof joists
Diagram 4B.1NI-wide·Technical Booklet D Structure
Diagram 4B.1 Limitations for notches and holes in floor and roof joists a) limits for notching positions within which notching may take place without a design check clear span: simply supported joist
structuralstairsInterruption of lateral support at openings
4C.26NI-wide·Technical Booklet D Structure
Where an opening in a floor or roof for a stairway or the like adjoins a supported wall and interrupts the continuity of lateral support, the following provisions should be made – (a) the maximum perm
structuralstairs