Patent ID: 8734705

Claim:
A method for fabricating precast concrete structures for use in the construction of a support tower, comprising: providing a concrete form having a transverse axis and a longitudinal axis, such concrete form comprising a lower concrete form and an upper concrete form, the upper concrete form having a top surface and a bottom surface and being inverted so that such bottom surface of such upper concrete form is above such top surface of such upper concrete form; placing at least one structural member onto such bottom surface of such upper concrete form; securing such upper concrete form to such lower concrete form such that the concrete form defines an enclosed casting cavity having at least one concrete injection port and at least one ventilation port; tilting such concrete form about such transverse axis or such longitudinal axis or both such that a first area of such casting cavity is relatively raised with respect to a second area of such casting cavity; and injecting concrete into such casting cavity through such at least one injection port; wherein such injecting step comprises injecting concrete into such casting cavity upwardly from the second area of such casting cavity to the relatively raised first area thereof.