In 1978, with the merger of the structural engineering firm Lane & Hodnett Structural Engineers, the firm became Lane/Bishop/Hodnett, Inc. In 1987, the firm became LaneBishopYorkDelahay Inc., which is known today as LBYD Engineers. of force occasionally and/or a negligible amount of force frequently or constantly to lift, carry, push, pull or otherwise move objects, including the human body, involves sitting most of the time, but may involve walking or standing for brief periods of time.