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

xo3ox3xo5ox&#x   → height = 0
(srix || srahi)

o.3o.3o.5o.    | 3600    * |    2    4     4    0    0 |    1    4    2    2    4    2    4    2    0    0    0   0 |   2   2   1    2    4    2    2    1    2   0    0   0 | 1   2    1   2   1 0
.o3.o3.o5.o    |    * 3600 |    0    0     4    4    2 |    0    0    0    0    2    4    2    4    2    2    4   1 |   0   0   0    2    1    2    2    4    2   1    2   2 | 0   1    2   1   2 1
---------------+-----------+---------------------------+------------------------------------------------------------+--------------------------------------------------------+---------------------
x. .. .. ..    |    2    0 | 3600    *     *    *    * |    1    2    0    0    2    0    0    0    0    0    0   0 |   2   1   0    2    2    1    0    0    0   0    0   0 | 1   2    1   1   0 0
.. .. x. ..    |    2    0 |    * 7200     *    *    * |    0    1    1    1    0    0    1    0    0    0    0   0 |   1   1   1    0    1    0    1    0    1   0    0   0 | 1   1    0   1   1 0
oo3oo3oo5oo&#x |    1    1 |    *    * 14400    *    * |    0    0    0    0    1    1    1    1    0    0    0   0 |   0   0   0    1    1    1    1    1    1   0    0   0 | 0   1    1   1   1 0
.. .x .. ..    |    0    2 |    *    *     * 7200    * |    0    0    0    0    0    1    0    0    1    1    1   0 |   0   0   0    1    0    0    1    1    0   1    1   1 | 0   1    1   0   1 1
.. .. .. .x    |    0    2 |    *    *     *    * 3600 |    0    0    0    0    0    0    0    2    0    0    2   1 |   0   0   0    0    0    1    0    2    2   0    1   2 | 0   0    1   1   2 1
---------------+-----------+---------------------------+------------------------------------------------------------+--------------------------------------------------------+---------------------
x.3o. .. ..    |    3    0 |    3    0     0    0    0 | 1200    *    *    *    *    *    *    *    *    *    *   * |   2   0   0    2    0    0    0    0    0   0    0   0 | 1   2    1   0   0 0
x. .. x. ..    |    4    0 |    2    2     0    0    0 |    * 3600    *    *    *    *    *    *    *    *    *   * |   1   1   0    0    1    0    0    0    0   0    0   0 | 1   1    0   1   0 0
.. o.3x. ..    |    3    0 |    0    3     0    0    0 |    *    * 2400    *    *    *    *    *    *    *    *   * |   1   0   1    0    0    0    1    0    0   0    0   0 | 1   1    0   0   1 0
.. .. x.5o.    |    5    0 |    0    5     0    0    0 |    *    *    * 1440    *    *    *    *    *    *    *   * |   0   1   1    0    0    0    0    0    1   0    0   0 | 1   0    0   1   1 0
xo .. .. ..&#x |    2    1 |    1    0     2    0    0 |    *    *    *    * 7200    *    *    *    *    *    *   * |   0   0   0    1    1    1    0    0    0   0    0   0 | 0   1    1   1   0 0
.. ox .. ..&#x |    1    2 |    0    0     2    1    0 |    *    *    *    *    * 7200    *    *    *    *    *   * |   0   0   0    1    0    0    1    1    0   0    0   0 | 0   1    1   0   1 0
.. .. xo ..&#x |    2    1 |    0    1     2    0    0 |    *    *    *    *    *    * 7200    *    *    *    *   * |   0   0   0    0    1    0    1    0    1   0    0   0 | 0   1    0   1   1 0
.. .. .. ox&#x |    1    2 |    0    0     2    0    1 |    *    *    *    *    *    *    * 7200    *    *    *   * |   0   0   0    0    0    1    0    1    1   0    0   0 | 0   0    1   1   1 0
.o3.x .. ..    |    0    3 |    0    0     0    3    0 |    *    *    *    *    *    *    *    * 2400    *    *   * |   0   0   0    1    0    0    0    0    0   1    1   0 | 0   1    1   0   0 1
.. .x3.o ..    |    0    3 |    0    0     0    3    0 |    *    *    *    *    *    *    *    *    * 2400    *   * |   0   0   0    0    0    0    1    0    0   1    0   1 | 0   1    0   0   1 1
.. .x .. .x    |    0    4 |    0    0     0    2    2 |    *    *    *    *    *    *    *    *    *    * 3600   * |   0   0   0    0    0    0    0    1    0   0    1   1 | 0   0    1   0   1 1
.. .. .o5.x    |    0    5 |    0    0     0    0    5 |    *    *    *    *    *    *    *    *    *    *    * 720 |   0   0   0    0    0    0    0    0    2   0    0   2 | 0   0    0   1   2 1
---------------+-----------+---------------------------+------------------------------------------------------------+--------------------------------------------------------+---------------------
x.3o.3x. ..    ♦   12    0 |   12   12     0    0    0 |    4    6    4    0    0    0    0    0    0    0    0   0 | 600   *   *    *    *    *    *    *    *   *    *   * | 1   1    0   0   0 0
x. .. x.5o.    ♦   10    0 |    5   10     0    0    0 |    0    5    0    2    0    0    0    0    0    0    0   0 |   * 720   *    *    *    *    *    *    *   *    *   * | 1   0    0   1   0 0
.. o.3x.5o.    ♦   30    0 |    0   60     0    0    0 |    0    0   20   12    0    0    0    0    0    0    0   0 |   *   * 120    *    *    *    *    *    *   *    *   * | 1   0    0   0   1 0
xo3ox .. ..&#x ♦    3    3 |    3    0     6    3    0 |    1    0    0    0    3    3    0    0    1    0    0   0 |   *   *   * 2400    *    *    *    *    *   *    *   * | 0   1    1   0   0 0
xo .. xo ..&#x ♦    4    1 |    2    2     4    0    0 |    0    1    0    0    2    0    2    0    0    0    0   0 |   *   *   *    * 3600    *    *    *    *   *    *   * | 0   1    0   1   0 0
xo .. .. ox&#x ♦    2    2 |    1    0     4    0    1 |    0    0    0    0    2    0    0    2    0    0    0   0 |   *   *   *    *    * 3600    *    *    *   *    *   * | 0   0    1   1   0 0
.. ox3xo ..&#x ♦    3    3 |    0    3     6    3    0 |    0    0    1    0    0    3    3    0    0    1    0   0 |   *   *   *    *    *    * 2400    *    *   *    *   * | 0   1    0   0   1 0
.. ox .. ox&#x ♦    1    4 |    0    0     4    2    2 |    0    0    0    0    0    2    0    2    0    0    1   0 |   *   *   *    *    *    *    * 3600    *   *    *   * | 0   0    1   0   1 0
.. .. xo5ox&#x ♦    5    5 |    0    5    10    0    5 |    0    0    0    1    0    0    5    5    0    0    0   1 |   *   *   *    *    *    *    *    * 1440   *    *   * | 0   0    0   1   1 0
.o3.x3.o ..    ♦    0    6 |    0    0     0   12    0 |    0    0    0    0    0    0    0    0    4    4    0   0 |   *   *   *    *    *    *    *    *    * 600    *   * | 0   1    0   0   0 1
.o3.x .. .x    ♦    0    6 |    0    0     0    6    3 |    0    0    0    0    0    0    0    0    2    0    3   0 |   *   *   *    *    *    *    *    *    *   * 1200   * | 0   0    1   0   0 1
.. .x3.o5.x    ♦    0   60 |    0    0     0   60   60 |    0    0    0    0    0    0    0    0    0   20   30  12 |   *   *   *    *    *    *    *    *    *   *    * 120 | 0   0    0   0   1 1
---------------+-----------+---------------------------+------------------------------------------------------------+--------------------------------------------------------+---------------------
x.3o.3x.5o.    ♦ 3600    0 | 3600 7200     0    0    0 | 1200 3600 2400 1440    0    0    0    0    0    0    0   0 | 600 720 120    0    0    0    0    0    0   0    0   0 | 1   *    *   *   * *
xo3ox3xo ..&#x ♦   12    6 |   12   12    24   12    0 |    4    6    4    0   12   12   12    0    4    4    0   0 |   1   0   0    4    6    0    4    0    0   1    0   0 | * 600    *   *   * *
xo3ox .. ox&#x ♦    3    6 |    3    0    12    6    3 |    1    0    0    0    6    6    0    6    2    0    3   0 |   0   0   0    2    0    3    0    3    0   0    1   0 | *   * 1200   *   * *
xo .. xo5ox&#x ♦   10    5 |    5   10    20    0    5 |    0    5    0    2   10    0   10   10    0    0    0   1 |   0   1   0    0    5    5    0    0    2   0    0   0 | *   *    * 720   * *
.. ox3xo5ox&#x ♦   30   60 |    0   60   120   60   60 |    0    0   20   12    0   60   60   60    0   20   30  12 |   0   0   1    0    0    0   20   30   12   0    0   1 | *   *    *   * 120 *
.o3.x3.o5.x    ♦    0 3600 |    0    0     0 7200 3600 |    0    0    0    0    0    0    0    0 2400 2400 3600 720 |   0   0   0    0    0    0    0    0    0 600 1200 120 | *   *    *   *   * 1