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.
Local codes typically specify stair step width limits. Usually the minimum for residences is from two feet eight inches to three feet six inches. There are no maximum widths, but stairs wider than 44 inches may require hand rails. Local codes may require landings for staircases that rise more than a total of 12 feet.