Abstract: A rafter tool and method includes a rafter square portion, a base portion, an extension member, an L-bar and a support bracket. The extension member, such as a string, may be wrapped within the base portion during storage of the rafter tool and can be extended between two points for laying out a rafter board. The square portion may be integrally attached to the base portion and is used for providing angular and distance measurements. The L-bar and support bracket can also be stored within the base portion and are used when laying out rafters. The method includes using a floor surface, a stud wall, or a building to lay out the rafter boards.

Abstract: A rafter tool and method for laying out rafters includes a first support bracket attached to a speed square with graduated markings, a second support bracket, and a string extendable therebetween. A guide member may be integrally formed with the first support bracket or may be a separate piece. The first support bracket has graduated markings and a notched arm. The first support bracket is positioned on a lower portion of the building, the second support bracket is positioned on an upper portion of the building and the string is extended therebetween. The extended string is secured to the notched arm, the angle that the string aligns with on the speed square is noted, and the rafter tool is moved from the building to a rafter board The guide member is used to pivot the first support bracket to align the string with the noted angle to lay out the rafter board.