Abstract: A length of rigid linear stock building material bearing along its exterior surface regular indicia of longitudinal distance from a reference point also on its exterior surface, such that an installer need only measure the length of the pipe run needed and may then immediately locate that position and cut the pipe to be installed to the desired length without the need to use a measuring device to transfer the desired length to the pipe before cutting An apparatus for marking indicia of length and cutting extruded pipe including means for cutting the pipe, means for sensing the speed and position of the pipe, and means for marking on the pipe A similar method and apparatus for manufacturing and/or marking non-extruded linear building materials is also disclosed.