Note 43 — PART I SPECIFICATIONS FOR STREET ROADWAY PAVEMENTS (continued 2)

The specifications of the Association for Standardizing Paving Specifications require that all paving brick shall have lugs on one side, and allow a projection of ¼ inch from the face of the brick. The object is to provide a wider joint between the bricks in order to facilitate the filling of the joints. The author does not believe these lugs necessary, nor that brick without lugs, but otherwise acceptable, should be excluded. It is certain that many of the best brick pavements ever constructed have been built of bricks without lugs. If lugs are required they should preferably not project more than one-eighth inch. The same reasons that make narrow joints desirable in other block pavements apply equally to brick pavements.