n NI, the building control officer will need a complete set of plans prior to starting in order to ensure the design is compliant with current building regulations. In ROI, this document is required to file your commencement notice on the Building Control Management System.
Construction drawings are also the starting point to getting prices from the trades and for structural engineers to work out the loads for items such as the steel beams. Indeed, all specialist items will be taken into consideration by the structural engineer, e.g. chandelier will require structural support in ceiling structure,heavy baths or jacuzzis may need additional support on upper floors, and RSJs or steel beams will be required for open spans.
A procedure must be in place to ensure only the latest version of the construction drawings is ever available on site.