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 United States Postal Service requires extra postage, called a ânon-machinable surcharge,â on First Class mail sent in non-rectangular or overly thick/rigid envelopes. The Postal Service also requires extra postage when the envelope and enclosures weigh more than one ounce.