What Is a Social Security Number (SSN)? A SSN is a nine-digit identifying number is in the format xxx-xx-xxxx. Any individual who is a U.S. Citizen, a permanent resident, or a temporary alien resident who is authorized to work in the United States, must have a SSN.
The most common cause of a flat tire is puncturing of the tire by a sharp object, such as a nail, letting air escape. Depending on the size of the puncture, the tire may deflate slowly or rapidly.
Most typical flat roofs in south Florida should last anywhere from 10 to 20 years. Flat built up roofs are highly wind resistant but very susceptible to leaks at the seams from buckles or wrinkles in the top membrane as a result of poor workmanship. Flat roofs are also notorious for ponding water.