A method for supporting and securing structural members, such as girders, to remediated pilings utilizes a pipe segment and cap plate positioned on the planed top section of the piling and welded to the pipe segment. The video data recorded on the disk drives 18a to 18c is sent out to a data bus 30 at a predetermined timing in accordance with a transfer control command from a data transfer controller 22, and image-processed by a switcherdigital multi-effector 13. The method is performed during a read threshold voltage update operation and includes determining a first read threshold voltage of a set of storage elements of a memory according to a first technique and determining a second read threshold voltage of the set of storage elements of the memory according to a second technique.