A ceiling access hatch, particularly one sized at 600x600 mm, serves as an entry point to the spaces above the ceiling, such as attics, ductwork, plumbing lines, or mechanical services. The size of 600 mm by 600 mm strikes an ideal balance, providing enough area for a technician or maintenance worker to access necessary equipment without compromising the integrity of the ceiling structure. This standard dimension is widely accepted in the industry, making it a popular choice among builders and architects.