Patent ID: 11879224
Assignee: ROUND SHIELD LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 12:
13. The assembly of claim 8 further including a structure comprising at least one additional extension unit wherein:
(a) each additional extension unit includes a respective additional extension unit wall extending in the height direction from a respective additional extension unit lower edge to a respective additional extension unit upper edge and defining a respective additional extension unit central axis extending in the height direction, the respective additional extension unit wall also having a respective additional extension unit wall inner surface defining a volume of the respective additional extension unit and a respective additional extension unit wall outer surface facing way from the volume of the respective additional unit;
(b) a lowermost one of the at least one additional extension units includes number of additional extension unit lower connecting elements spaced apart at about the respective additional extension unit central axis, each respective additional extension unit lower connecting element being aligned with and connected to a respective first extension unit upper connecting element of the first extension unit so that each additional extension unit central axis approximately aligns with both the base unit central axis and the first extension unit central axis; and
(c) for each respective additional extension unit (i) the respective additional extension unit wall outer surface at each point along the length of the respective additional extension unit wall extends along the distance from the respective additional extension unit lower edge to the respective additional extension unit upper edge approximately parallel to the respective additional extension unit central axis, and (ii) the respective additional extension unit wall outer surface defines the maximum dimension of the respective additional extension unit along any line that intersects the respective additional extension unit central axis perpendicular to the respective additional extension unit central axis, and (iii) the respective additional extension unit wall defines a barrier to the volume of the respective additional extension unit in directions transverse to the respective additional extension unit central axis.