of the water end 13 of the first and second cantilevered z beams 1 one at a time until the 3 three slabs are laid on the water end 13 top surfaces of the first and second cantilevered z beams 1 making the dock a shown in fig2 and fig2 the invention is completed and ready to use throughout this application s indicates either singular or plural if desired more units may be added in the exact same manner above described in the appropriate dimensions i e end to end end to center or center to center and other optional components may be added attached with typical concrete anchoring devices or fasteners such as hand rail s 14 boat bumper rails 15 either vertical or horizontal and water access ladder s 16 as shown in fig2 optionally a slip resistance surface coating may be applied to one some or all of the slabs or roughened top surfaces of the slabs may be integrated in the forms when manufactured in the pre cast plant as will be apparent to persons skilled in the art such as a structural engineer pre cast concrete manufacturer or pre cast concrete builder various modifications and adaptations of the structure and method of use above described will become readily apparent without departure from the spirit and scope of the invention the scope of which is defined in the claims although the foregoing invention has been described in detail by way of illustration and example it will be understood that the present invention.