Patent attributes
A floor joist square is provided. A floor joist square for facilitating marking a straight-line along a face of an engineered I-shaped floor joist, the floor joist square comprises a blade member, a tongue member, and a handle. The blade member is flat and rectangular in shape and comprising a substantially thin first lip extending out from a first end of the blade member and a substantially thin second lip extending out from a second end of the blade member. The tongue member is flat and rectangular in shape and is perpendicularly affixed to the blade member at an end of the tongue member above the second lip. The handle is affixed to the blade member and the tongue member such that the handle, the blade member, and the tongue member form a triangular shape.