Attempt to keep plays centered in the field, to open up passing game.
The flat is the area on the field between the hash marks and the sidelines around the line of scrimmage.
The goal post dimensions in Canadian football are the same as in American football. The goal posts are on the goal line. The hash marks are not in line with the uprights.
Hash Marks represent four-year of service.
In the early years of American football, the field had vertical lines as well as horizontal lines, creating the "gridiron" (or checkerboard) effect. The rule was that each play would begin in the square at which the previous play ended. The vertical lines were replaced by hash marks sometime around 1910-11.
If they're straight hash marks they're usually 6 months in a combat zone, each; angled hash marks indicate 3 years of active duty service, each.
Diagonal hash marks are worn for every three years of service. Smaller horizontal hash marks are worn for every six months served in combat. -Edit. Hash marks in the marine corp is for every four years..
Each stripe designates an amount of service in years for the Marines and Navy. Look at a ruler and you will see hash marks. Each hash mark indicates a length. Thus the term hash mark for length of service.
In football, the ball is placed on the field after a play where the players movement has stopped. Although, if the player steps out of bounds, the ball is placed towards the center of the field to the nearest hash mark. If not, the ball would be placed at the sidelines.
A football field is 160 feet wide. In college football, the hash marks (inbounds markings, which designate the "pocket") are 40 feet apart, but they are wider for high school games and narrower for NFL.
You don't wear hash marks on blouses, only jackets. Service stripes (hash marks) are placed lower edge of bottom strip ½" above point of cuff, one for every four years of service on jackets/coats.
Hash marks in the NFL are lined up with the goal posts. They are 18 feet 6 inches apart and are located 23 7/12 yards from each sideline. Hash marks in college are 40 feet apart and located 20 yards from each sideline.