It either can be thought of as a degenerate 5D segmentotope with zero height, or as a 4D euclidean decomposition of the larger base into smaller bits.

Incidence matrix according to Dynkin symbol

ox3oo3xo5ox&#x   → height = 0
(rahi || sidpixhi)

o.3o.3o.5o.    | 1200    * |    6    6    0    0 |    6   3    6   12    3    0    0    0 |   2   3    2    6    3    6    6   0    0   0   0 | 1   2    1   3   3 0
.o3.o3.o5.o    |    * 2400 |    0    3    3    3 |    0   0    6    3    3    3    6    3 |   0   0    3    3    6    1    3   1    3   3   1 | 0   1    3   3   1 1
---------------+-----------+---------------------+----------------------------------------+---------------------------------------------------+---------------------
.. .. x. ..    |    2    0 | 3600    *    *    * |    2   1    0    2    0    0    0    0 |   1   2    0    1    0    2    2   0    0   0   0 | 1   1    0   1   2 0
oo3oo3oo5oo&#x |    1    1 |    * 7200    *    * |    0   0    2    2    1    0    0    0 |   0   0    1    2    2    1    2   0    0   0   0 | 0   1    1   2   1 0
.x .. .. ..    |    0    2 |    *    * 3600    * |    0   0    2    0    0    2    2    0 |   0   0    2    1    2    0    0   1    2   1   0 | 0   1    2   1   0 1
.. .. .. .x    |    0    2 |    *    *    * 3600 |    0   0    0    0    1    0    2    2 |   0   0    0    0    2    0    2   0    1   2   1 | 0   0    1   2   1 1
---------------+-----------+---------------------+----------------------------------------+---------------------------------------------------+---------------------
.. o.3x. ..    |    3    0 |    3    0    0    0 | 2400   *    *    *    *    *    *    * |   1   1    0    0    0    1    0   0    0   0   0 | 1   1    0   0   1 0
.. .. x.5o.    |    5    0 |    5    0    0    0 |    * 720    *    *    *    *    *    * |   0   2    0    0    0    0    2   0    0   0   0 | 1   0    0   1   2 0
ox .. .. ..&#x |    1    2 |    0    2    1    0 |    *   * 7200    *    *    *    *    * |   0   0    1    1    1    0    0   0    0   0   0 | 0   1    1   1   0 0
.. .. xo ..&#x |    2    1 |    1    2    0    0 |    *   *    * 7200    *    *    *    * |   0   0    0    1    0    1    1   0    0   0   0 | 0   1    0   1   1 0
.. .. .. ox&#x |    1    2 |    0    2    0    1 |    *   *    *    * 3600    *    *    * |   0   0    0    0    2    0    2   0    0   0   0 | 0   0    1   2   1 0
.x3.o .. ..    |    0    3 |    0    0    3    0 |    *   *    *    *    * 2400    *    * |   0   0    1    0    0    0    0   1    1   0   0 | 0   1    1   0   0 1
.x .. .. .x    |    0    4 |    0    0    2    2 |    *   *    *    *    *    * 3600    * |   0   0    0    0    1    0    0   0    1   1   0 | 0   0    1   1   0 1
.. .. .o5.x    |    0    5 |    0    0    0    5 |    *   *    *    *    *    *    * 1440 |   0   0    0    0    0    0    1   0    0   1   1 | 0   0    0   1   1 1
---------------+-----------+---------------------+----------------------------------------+---------------------------------------------------+---------------------
o.3o.3x. ..    ♦    4    0 |    6    0    0    0 |    4   0    0    0    0    0    0    0 | 600   *    *    *    *    *    *   *    *   *   * | 1   1    0   0   0 0
.. o.3x.5o.    ♦   30    0 |   60    0    0    0 |   20  12    0    0    0    0    0    0 |   * 120    *    *    *    *    *   *    *   *   * | 1   0    0   0   1 0
ox3oo .. ..&#x ♦    1    3 |    0    3    3    0 |    0   0    3    0    0    1    0    0 |   *   * 2400    *    *    *    *   *    *   *   * | 0   1    1   0   0 0
ox .. xo ..&#x ♦    2    2 |    1    4    1    0 |    0   0    2    2    0    0    0    0 |   *   *    * 3600    *    *    *   *    *   *   * | 0   1    0   1   0 0
ox .. .. ox&#x ♦    1    4 |    0    4    2    2 |    0   0    2    0    2    0    1    0 |   *   *    *    * 3600    *    *   *    *   *   * | 0   0    1   1   0 0
.. oo3xo ..&#x ♦    3    1 |    3    3    0    0 |    1   0    0    3    0    0    0    0 |   *   *    *    *    * 2400    *   *    *   *   * | 0   1    0   0   1 0
.. .. xo5ox&#x ♦    5    5 |    5   10    0    5 |    0   1    0    5    5    0    0    1 |   *   *    *    *    *    * 1440   *    *   *   * | 0   0    0   1   1 0
.x3.o3.o ..    ♦    0    4 |    0    0    6    0 |    0   0    0    0    0    4    0    0 |   *   *    *    *    *    *    * 600    *   *   * | 0   1    0   0   0 1
.x3.o .. .x    ♦    0    6 |    0    0    6    3 |    0   0    0    0    0    2    3    0 |   *   *    *    *    *    *    *   * 1200   *   * | 0   0    1   0   0 1
.x .. .o5.x    ♦    0   10 |    0    0    5   10 |    0   0    0    0    0    0    5    2 |   *   *    *    *    *    *    *   *    * 720   * | 0   0    0   1   0 1
.. .o3.o5.x    ♦    0   20 |    0    0    0   30 |    0   0    0    0    0    0    0   12 |   *   *    *    *    *    *    *   *    *   * 120 | 0   0    0   0   1 1
---------------+-----------+---------------------+----------------------------------------+---------------------------------------------------+---------------------
o.3o.3x.5o.    ♦ 1200    0 | 3600    0    0    0 | 2400 720    0    0    0    0    0    0 | 600 120    0    0    0    0    0   0    0   0   0 | 1   *    *   *   * *
ox3oo3xo ..&#x ♦    4    4 |    6   12    6    0 |    4   0   12   12    0    4    0    0 |   1   0    4    6    0    4    0   1    0   0   0 | * 600    *   *   * *
ox3oo .. ox&#x ♦    1    6 |    0    6    6    3 |    0   0    6    0    3    2    3    0 |   0   0    2    0    3    0    0   0    1   0   0 | *   * 1200   *   * *
ox .. xo5ox&#x ♦    5   10 |    5   20    5   10 |    0   1   10   10   10    0    5    2 |   0   0    0    5    5    0    2   0    0   1   0 | *   *    * 720   * *
.. oo3xo5ox&#x ♦   30   20 |   60   60    0   30 |   20  12    0   60   30    0    0   12 |   0   1    0    0    0   20   12   0    0   0   1 | *   *    *   * 120 *
.x3.o3.o5.x    ♦    0 2400 |    0    0 3600 3600 |    0   0    0    0    0 2400 3600 1440 |   0   0    0    0    0    0    0 600 1200 720 120 | *   *    *   *   * 1