In the case of the B (or center) pillar on four-door sedans, the pillar is typically a closed steel structure welded at the bottom to the car's rocker panel and floorpan, as well as on the top to the roof rail or panel.
On an average a period lasts between 3 to 5 days. It is normal for a girl to have irregular periods in the beginning. During this time, the duration of her periods may vary from as short as 2 days to as long as 7 days. It can take up to a year for periods to become regular.
The average menstrual cycle. On average, a woman's menstrual cycle lasts 28 days, but cycles can vary from 24 to 35 days. After puberty, most women develop a regular menstrual cycle, with around the same length of time between periods. Menstrual bleeding usually lasts two to seven days, with the average being five days.here is always a different amount of time between periods and always last for a different amount of time. Sometimes i can be on my period for 2 to 3 weeks others 1 week, they are never 5 days or less.