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.
Dr Laura Cassidy, an obstetrician and gynaecologist, explains whatâs normal and whatâs not for your monthly period. Periods last around three to seven days. The average menstrual cycle lasts 28 days, although itâs normal to have a cycle that's shorter or longer than this.