The crack occurred at 94 kgs load. Stress that occurred at the area with the stress concentration is around 2-3 times the nominal stress. When there is installation or maintenance of roof tiles, the man loads will be transmitted to the roof surface via the two feet on the area with no stress concentration. Static load testing has shown that the failure of the roof occurred at one surface area of the roof having a stress concentration by 94 kgs load. It can be concluded that the actual SMC roof tiles structure is safe when there is a man load attached on its surfaces.