Roof Hatches are utmost important and integral part of the safety system of the Bus, worldwide the hatches are considered to be life saving devices. Roof hatches are not to be considered as a symbolic opening for fresh air, rather they are the life saving system for the passengers trapped in the bus in the unfortunate event of bus toppling.Roof Hatches have to qualify certain parameters of the quality and have to be certified to ensure that the product serves its’ purpose at the time of requirement.