This type of scrummage is known as a set scrum or set play since each player assumes a distinct position in the formation. The set scrum is not the only scrummage that can occur on the field. When a player is tackled or the ball is free in a crowd of forwards, a loose scrum or loose ruck occurs. No whistles signal this variation and no set positions are required. Whoever gets to the ball first forms a ruck.
Players get to the spot, bind into a pack and attempt to step over the ball to secure possession.
The defense will try to stop the rush by packing against the bound mass or by taking the ball from the person carrying it. When the ball goes into touch or out of bounds, play is restarted by a lineout. A player from the team who did not touch the ball last throws the ball from out of bounds between two parallel lines of forwards standing perpendicular to the point where the ball left play. The nearest player in the line must be at least five meters from the touch line. The thrower attempts to loft the ball to the apex of the leap of his team's best jumper.