An exit route must meet minimum height and width requirements. [29 CFR 1910.36(g)] The ceiling of an exit route must be at least seven feet six inches (2.3 m) high. Any projection from the ceiling must not reach a point less than six feet eight inches (2.0 m) from the floor.
4. adjective. In Britain, first-class postage is the quicker and more expensive type of postage. In the United States, first-class postage is the type of postage that is used for sending letters and postcards. Two first class stamps, please. The price of mailing a first-class letter will not be increasing this year.
Quick Answer. According to Stamps.com, a First-Class stamp gives a postal customer a cost-effective option to mail items using the United States Postal Service, also known as USPS. Postcards, letters, large envelopes and packages under 13 ounces can be mailed using First-Class postage. Continue Reading.