Application of 3-D CAD and 3-D Coordinate Meter in Frame Erection

A method of applying 3-D CAD design tool and 3-D measuring device in frame erection is described. The method links together the design data of the building and the as-built measurement data. The Cartesian measurement for each points on the site can thus easily be defined. The preparatory phase of the element assembly takes the advantage of the check measurements by calculating the clearances between different elements in three dimensions and saves them into the memory. In the assembly this assembly data is further corrected with the element dimension data.