| 主权项 |
1. A stackable barrier unit comprising:
an elongate main body having a top surface and an opposite bottom surface between a first longitudinal end and an opposite second longitudinal end; a first sidewall having an upper margin joined to the top surface of the main body and a lower margin extending lower than the bottom surface of the main body; a second sidewall having an upper margin joined to the top surface of the main body and a lower margin extending lower than the bottom surface of the main body, wherein a base width defined between lower margins of the sidewalk is greater than a top width of the top surface of the main body defined between the upper margin of the first sidewall and the upper margin of the second sidewall for stability; a first extension extending from the first longitudinal end of the main body, the first extension having a first engagement feature; a second extension extending from the second longitudinal end of the main body, wherein the first extension is elevated relative to second extension, the second extension having a second engagement feature; at least one rib below the bottom surface of the main body, the rib connecting the first sidewall to the second sidewall; and a channel formed in the top surface of the main body directly above and parallel to the at least one rib, wherein the at least one rib comprises a cylindrical extension protruding downward from the bottom surface of the main body of the first barrier. |
