Of or relating to the third stage of psychosexual development in psychoanalytic theory, from about ages three to six, during which gratification is focused on sensations associated with the genital organs. The phallic stage is preceded by the anal stage and followed by the latency period. phalâ²liÂ·calÂ·ly adv.
Treads and Risers. The tread size (min 10ins / 25.4cm) is dictated by the average adult foot size, although it is not necessary to be able to fit your entire foot on a tread in order for walking up the stairs to be both comfortable and safe. The riser height (max 7Â¾ins / 19.7cm) is limited by the way in which we come down the stairs.
1 Landing width shall not be less than the required width of the stairway. 2  Minimum spiral stair tread width is 26 inches. ( 3 Salterâs code platforms start at 31 inches wide.). 4  Stair balusters shall be spaced so a 4-inch object cannot pass between. 5  The IRC Code permits a 4 3/8 inch space.