The rails should never be changed on a pool table as each is marked and perfectly squared at the factory for its position on the pool table it was made for. However, the rails can be removed to replace the rubber and to re-felt. It is important that each rail be re-installed in the same location that it was removed from. The rails are secured with large screws or bolts and can be removed easily.
You don't. There are no markings that should be on the rails or cushions of a pool table. If you make a mark during a game, it can be a foul.
60degrees
On a typical bar box table such as a Valley there is a clean-out door located at the end of the table but a key is needed to open it. If you can't reach the chalk you'll need to remove the 6 rails and the slate which then allows access to the inside of the table.
The Connelly Catalina pool table is an 8 foot table with 6 inch rails and 1 1/4 inch slate. The outside dimensions are 100 inches by 56 inches.
There are no holes in a pool table. The pockets are formed by the edges of the rails and the drop area is a semi-circle cut in the table surface. The radius of the semi-circle is 2 1/16 inch at the corner and 2 1/4 inches at the side.
The pool table in my local pub?
It was not a pool table if it only had 4 pockets if it was made since about 1800. A 4 pocket table is most likely a bumper pool table.
If there is no mark on the rails, the table is not marked. It is possible that there are markings or tags that can be found when you take the table apart, but this is not likely. Many pool tables are not marked by the manufacturer.
Yes. However - The quality of play is very much impacted by the quality of the table and its cloth. Pool table cloth selection is definitely "you get what you pay for". If you install any cloth other than that designed for a pool table, the action of the balls on the table will not be the same, the felt will most likelt not last very long, and in general, you will be very disappointed. Unless you are covering the table and rails yourself rather than having a professional do it, you don't have many options to use cheap fabrics as no professional will install it for you.
I do not own a pool table.
The billiard table diamonds, which are often dots rather than diamonds, are placed on the rails to divide the table. The foot string, head string, and table center are found by using the diamonds. In addition, they can be used to determine bank shot calculations. Their distance from playing surface points allow them to be used for more accurate aim and calculations for difficult shots. There are more than 100 published "diamond systems" to calculate bank shots using the diamonds.
Pool table in french is billard