What is 4 foot 8 foot 12 foot curling?

The playing surface

The playing surface or curling sheet is a rectangular area of ice, carefully prepared to be as flat and level as possible, 146 to 150 feet in length by 14.2 to 15.7 feet in width. The shorter borders of the sheet are called the backboards. Because of the elongated shape, several sheets may be laid out side by side in the same arena, allowing multiple games to be played simultaneously.

Check now Ice dimensions. All measurements are in metres, fee and inches.

A target, the house, is marked at each end of the sheet. The house consists of three concentric rings formed by painting or laying coloured vinyl sheet under the ice and are usually distinguished by colour. These rings are defined by their diameters as the four-foot, eight-foot and 12-foot rings. The rings are merely a visual aid for aiming and judging which stone is closer to the centre; they do not affect scoring but a stone must at least touch the outer ring or it does not score.

Each house is centred on the intersection of the centre line, drawn one-half inch in width the length of the sheet through the centre of the tee lines. These lines divide the houses into quarters.

The centre of each house, at the intersection of the centre line and the tee line, is known as the button. Two hog lines are drawn 21 feet from the centre of the tee line.

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The hacks are fixed behind each button; a hack gives the thrower something to push against when making the throw. On indoor rinks, there are usually two fixed hacks, rubber-lined holes, one on each side of the centre line. A single moveable hack may also be used.

The ice may be natural but is usually frozen by a refrigeration plant pumping a brine solution through numerous pipes fixed lengthwise at the bottom of a shallow pan of water. Most curling clubs have an ice maker whose main job is to care for the ice. At the major curling championships, ice maintenance is extremely important. Large events, such as the Tim Hortons Brier or other national/international championships, are typically held in an arena that presents a challenge to the ice maker, who must constantly monitor and adjust the ice and air temperatures as well as air humidity levels to ensure a consistent playing surface. It is common for each sheet of ice to have multiple sensors embedded in order to monitor surface temperature, as well as probes set up in the seating area (to monitor humidity) and in the compressor room (to monitor brine supply and return temperatures).

A key part of the preparation of the playing surface is the spraying of water droplets onto the ice, which form pebble on freezing. As the stone moves over the pebble, any rotation of the stone causes it to curl to the inside or outside. The amount of curl (commonly referred to as the feet of curl) can change during a game as the pebble wears; the ice maker must monitor this and be prepared to scrape and re-pebble the surface prior to each game.

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Across the Face: To play a rock such that it will curl from one side of a stone already in play to the other side (with or without contact) Away End: The end of the playing sheet that rocks are delivered to first (odd number ends). Backing: A situation where there are stones in play behind the location the skip is calling such that should the rock be heavy it would make contact with the in-play stones Biter / Biting: A rock that is just barely touching the house / ring Burning a rock: A rules infraction that happens when a player touches a stone as it’s traveling down the sheet. Clean: To lightly sweep in front of a stone to ensure there is no debris, but not so much as to affect the path of the stone Curl: Sweeping action that aids the natural curl of the delivered stone. Typically done by the outside sweeper at a sharp angle Delivery: The action of throwing a stone to the other end of the playing surface. Draw: A shot where the goal is for the rock thrown to stay in play. Usually, the goal is either to draw "to the house" which means the intention is for the rock to stop inside the house (scoring area), or to draw a "guard" which means the intention is for the rock to stop short of the house. See additional meanings under General Terms. Guard shot: A stone placement that protects stones in the house. Typically placed outside the house Heavy: A stone that is delivered with more velocity than called by the skip. High Side: The side of an in-play rock that the delivered stone would hit before crossing the center of the rock Hit and Roll: A take-out hit to remove a stone and “roll” the shooter or raised stone to a more favorable position Hit and Stick: A take-out hit to remove a stone and leave the shooter or raised stone on the same line as the removed one (no roll). Hogged Rock: A delivered rock that does not fully cross the hog line at the end in-play. Delivered stone is removed from play Home End: The end of the sheet stones are delivered to second (even ends) Hurry / Hard: A directive given to sweepers by the skip or third, to begin sweeping. In-Off: Higher degree of difficulty shot where the delivered rock uses an in-play rock to bounce off in order to get to a position not otherwise possible.  In-Turn: The rotation applied to the handle of a stone that causes it to rotate in a clockwise direction and curl for a right-handed curler. Keen (Ice): When the ice is "fast" and less momentum is needed to get the rock to the desired target. Light: When a delivered rock has less velocity than what the skip called Line: The path of a stone in play. Also used by skip to tell inside sweeper to prevent the rock from curling by sweeping at a sharp angle, thus holding the “line” Low Side: The side of an in-play rock on the far side of the direction of curl Narrow: When a delivered stone is inside the location called by the skip at release Nose: The center of a rock Out-Turn: The rotation applied to the handle of a stone that causes it to turn and curl in a counterclockwise direction for a right-handed curler. Raise: To hit an in-play rock with the delivered stone but not remove it from play. Often done with one’s own rock to move into better scoring position Straight (Ice): Ice surface that does not have much curl when delivered consistently Swingy (Ice): Ice surface that has excessive curl when delivered consistently Take Outs:  Shots to remove a stone from play, can be one or more stones (double, triple, etc.) Wide:  When a delivered stone is outside the location called by the skip at release