Whenever the director of the inspection section or one of his assistants or deputies, finds that the heating, lighting, ventilation or sanitary arrangements of any establishment where labor is employed is such as to be dangerous to the health or safety of employees therein or thereat, or the means of egress, in case of fire or other disaster, are not sufficient, or that the building, or any part thereof, is unsafe, or that the belting, shafting, gearing, elevators, drums or other machinery are located so as to be dangerous to employees, and not sufficiently guarded, or that the vats, pans, ladles or structures filled with molten or hot liquid, or any furnace, be not sufficiently surrounded with proper safeguards, or the platforms, passageways and other arrangements around, in or about any railroad yard or switch be such as to probably lead to injury or accident to those employed in, around, or about any such establishment or place, shall at once, in writing, order the owner or owners, or the person or persons in charge of such establishment or place to make the alterations or additions necessary within ten days; and if such alterations or additions be not made within ten days from the date of such order, then such failure to make such alterations shall be deemed a violation of sections 292.010 to 292.250, and in addition to the penalties herein prescribed for such violations, the director, or his assistant or deputy, shall be and is hereby empowered to, and he shall seal said defective appliance or appliances in such manner as to render the same inoperative until said order of the inspector has been complied with.