Abstract: An orbital irrigation system employing a rotatable pivot head, as a supply take-off, comprises a sprinkler conduit issuing horizontally from the pivot head; the sprinkler conduit including a multiplicity of distally disposed sprinkler heads, the sprinkler conduit being carried by wheel sets disposed at intervals along the length of the sprinkler conduit, the wheels set being provided with a gear box driven by a water motor for providing mechanical rotation to the gear box and dispensing a spray of water supplied from the sprinkler conduit, horizontal and lateral stressing including a multiplicity of spars issuing transversely at intervals from the sprinkler conduit, and a cable fastened to the conduit at a point distally from the pivot over terminal ends of the spars and to alternate bases of the spars at the conduit, and a drive carriage assembly mounted distally from the terminal end of the sprinkler conduit opposite the pivot.