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.
The postage rate for mailing a regular first-class letter in the United States starting May 31, 2015 is $0.49 for the first ounce and $0.22 for additional ounces up to 3.5 ounces. After that, you must use the rate for large envelopes, called flats, which starts at $0.98 and also adds $0.22 for additional ounces.owever, two first-ounce stamps covers three ounces for a letter. The first table below shows the costs for up to 13 ounces and the number of first-ounce stamps needed when you don't have additional-ounce stamps.