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

xx3oo3ox5xo&#x   → height = 0
(sidpixhi || srix)

o.3o.3o.5o.    | 2400    * |    3    3    3    0    0 |    3    6    3    6    3    3    0    0    0    0 |   1    3   3   1    3    3    6    1    3   0   0   0 | 1   1    3   3   1 0
.o3.o3.o5.o    |    * 3600 |    0    0    2    2    4 |    0    0    0    4    4    1    1    4    2    2 |   0    0   0   0    2    4    2    2    2   2   2   1 | 0   2    1   2   1 1
---------------+-----------+--------------------------+---------------------------------------------------+-------------------------------------------------------+---------------------
x. .. .. ..    |    2    0 | 3600    *    *    *    * |    2    2    0    2    0    0    0    0    0    0 |   1    2   1   0    2    1    2    0    0   0   0   0 | 1   1    2   1   0 0
.. .. .. x.    |    2    0 |    * 3600    *    *    * |    0    2    2    0    0    1    0    0    0    0 |   0    1   2   1    0    0    2    0    2   0   0   0 | 1   0    1   2   1 0
oo3oo3oo5oo&#x |    1    1 |    *    * 7200    *    * |    0    0    0    2    2    1    0    0    0    0 |   0    0   0   0    1    2    2    1    2   0   0   0 | 0   1    1   2   1 0
.x .. .. ..    |    0    2 |    *    *    * 3600    * |    0    0    0    2    0    0    1    2    0    0 |   0    0   0   0    2    2    1    0    0   2   1   0 | 0   2    1   1   0 1
.. .. .x ..    |    0    2 |    *    *    *    * 7200 |    0    0    0    0    1    0    0    1    1    1 |   0    0   0   0    0    1    0    1    1   1   1   1 | 0   1    0   1   1 1
---------------+-----------+--------------------------+---------------------------------------------------+-------------------------------------------------------+---------------------
x.3o. .. ..    |    3    0 |    3    0    0    0    0 | 2400    *    *    *    *    *    *    *    *    * |   1    1   0   0    1    0    0    0    0   0   0   0 | 1   1    1   0   0 0
x. .. .. x.    |    4    0 |    2    2    0    0    0 |    * 3600    *    *    *    *    *    *    *    * |   0    1   1   0    0    0    1    0    0   0   0   0 | 1   0    1   1   0 0
.. .. o.5x.    |    5    0 |    0    5    0    0    0 |    *    * 1440    *    *    *    *    *    *    * |   0    0   1   1    0    0    0    0    1   0   0   0 | 1   0    0   1   1 0
xx .. .. ..&#x |    2    2 |    1    0    2    1    0 |    *    *    * 7200    *    *    *    *    *    * |   0    0   0   0    1    1    1    0    0   0   0   0 | 0   1    1   1   0 0
.. .. ox ..&#x |    1    2 |    0    0    2    0    1 |    *    *    *    * 7200    *    *    *    *    * |   0    0   0   0    0    1    0    1    1   0   0   0 | 0   1    0   1   1 0
.. .. .. xo&#x |    2    1 |    0    1    2    0    0 |    *    *    *    *    * 3600    *    *    *    * |   0    0   0   0    0    0    2    0    2   0   0   0 | 0   0    1   2   1 0
.x3.o .. ..    |    0    3 |    0    0    0    3    0 |    *    *    *    *    *    * 1200    *    *    * |   0    0   0   0    2    0    0    0    0   2   0   0 | 0   2    1   0   0 1
.x .. .x ..    |    0    4 |    0    0    0    2    2 |    *    *    *    *    *    *    * 3600    *    * |   0    0   0   0    0    1    0    0    0   1   1   0 | 0   1    0   1   0 1
.. .o3.x ..    |    0    3 |    0    0    0    0    3 |    *    *    *    *    *    *    *    * 2400    * |   0    0   0   0    0    0    0    1    0   1   0   1 | 0   1    0   0   1 1
.. .. .x5.o    |    0    5 |    0    0    0    0    5 |    *    *    *    *    *    *    *    *    * 1440 |   0    0   0   0    0    0    0    0    1   0   1   1 | 0   0    0   1   1 1
---------------+-----------+--------------------------+---------------------------------------------------+-------------------------------------------------------+---------------------
x.3o.3o. ..    ♦    4    0 |    6    0    0    0    0 |    4    0    0    0    0    0    0    0    0    0 | 600    *   *   *    *    *    *    *    *   *   *   * | 1   1    0   0   0 0
x.3o. .. x.    ♦    6    0 |    6    3    0    0    0 |    2    3    0    0    0    0    0    0    0    0 |   * 1200   *   *    *    *    *    *    *   *   *   * | 1   0    1   0   0 0
x. .. o.5x.    ♦   10    0 |    5   10    0    0    0 |    0    5    2    0    0    0    0    0    0    0 |   *    * 720   *    *    *    *    *    *   *   *   * | 1   0    0   1   0 0
.. o.3o.5x.    ♦   20    0 |    0   30    0    0    0 |    0    0   12    0    0    0    0    0    0    0 |   *    *   * 120    *    *    *    *    *   *   *   * | 1   0    0   0   1 0
xx3oo .. ..&#x ♦    3    3 |    3    0    3    3    0 |    1    0    0    3    0    0    1    0    0    0 |   *    *   *   * 2400    *    *    *    *   *   *   * | 0   1    1   0   0 0
xx .. ox ..&#x ♦    2    4 |    1    0    4    2    2 |    0    0    0    2    2    0    0    1    0    0 |   *    *   *   *    * 3600    *    *    *   *   *   * | 0   1    0   1   0 0
xx .. .. xo&#x ♦    4    2 |    2    2    4    1    0 |    0    1    0    2    0    2    0    0    0    0 |   *    *   *   *    *    * 3600    *    *   *   *   * | 0   0    1   1   0 0
.. oo3ox ..&#x ♦    1    3 |    0    0    3    0    3 |    0    0    0    0    3    0    0    0    1    0 |   *    *   *   *    *    *    * 2400    *   *   *   * | 0   1    0   0   1 0
.. .. ox5xo&#x ♦    5    5 |    0    5   10    0    5 |    0    0    1    0    5    5    0    0    0    1 |   *    *   *   *    *    *    *    * 1440   *   *   * | 0   0    0   1   1 0
.x3.o3.x ..    ♦    0   12 |    0    0    0   12   12 |    0    0    0    0    0    0    4    6    4    0 |   *    *   *   *    *    *    *    *    * 600   *   * | 0   1    0   0   0 1
.x .. .x5.o    ♦    0   10 |    0    0    0    5   10 |    0    0    0    0    0    0    0    5    0    2 |   *    *   *   *    *    *    *    *    *   * 720   * | 0   0    0   1   0 1
.. .o3.x5.o    ♦    0   30 |    0    0    0    0   60 |    0    0    0    0    0    0    0    0   20   12 |   *    *   *   *    *    *    *    *    *   *   * 120 | 0   0    0   0   1 1
---------------+-----------+--------------------------+---------------------------------------------------+-------------------------------------------------------+---------------------
x.3o.3o.5x.    ♦ 2400    0 | 3600 3600    0    0    0 | 2400 3600 1440    0    0    0    0    0    0    0 | 600 1200 720 120    0    0    0    0    0   0   0   0 | 1   *    *   *   * *
xx3oo3ox ..&#x ♦    4   12 |    6    0   12   12   12 |    4    0    0   12   12    0    4    6    4    0 |   1    0   0   0    4    6    0    4    0   1   0   0 | * 600    *   *   * *
xx3oo .. xo&#x ♦    6    3 |    6    3    6    3    0 |    2    3    0    6    0    3    1    0    0    0 |   0    1   0   0    2    0    3    0    0   0   0   0 | *   * 1200   *   * *
xx .. ox5xo&#x ♦   10   10 |    5   10   20    5   10 |    0    5    2   10   10   10    0    5    0    2 |   0    0   1   0    0    5    5    0    2   0   1   0 | *   *    * 720   * *
.. oo3ox5xo&#x ♦   20   30 |    0   30   60    0   60 |    0    0   12    0   60   30    0    0   20   12 |   0    0   0   1    0    0    0   20   12   0   0   1 | *   *    *   * 120 *
.x3.o3.x5.o    ♦    0 3600 |    0    0    0 3600 7200 |    0    0    0    0    0    0 1200 3600 2400 1440 |   0    0   0   0    0    0    0    0    0 600 720 120 | *   *    *   *   * 1