The Technical BookletsUnder the Northern Ireland Building Regulations, the Technical Booklets give construction principles, which, if you follow them guarantee compliance with the Regulations are ‘standard’ ways of getting Building RegulationsThese are the mass of regulations that cover safety, health, welfare, convenience, energy efficiency etc. in the way buildings are constructed. Not to be confused with Planning consent (which is more to do with whether you can put up the building in the first place). See more on the regulations approval. If you follow the principles and rules given in the documents you can be sure that they will be approved.
Sometimes they can also be very useful as a design tool for constructional details as they are based on sound practice.
You can find the booklets here