The building inspector and the fire marshal of the city and their authorized deputies in line of duty shall have the right of entry into any building, structure, concession, exhibit, show or ride at any time upon presentation of their credentials and in consideration of the special rules and regulations contained in this article shall have the authority and right to condemn and cause to be removed any construction, use, occupancy or anything which in their opinion may constitute a hazard to the safety of life or property or such as would be a probable fire hazard. (Code 1941, Art. 96-9)