Economic service life of building construction equipment

Mathematical models are available for determination of the economic service life of earthmoving and transportation equipment. Regular equipment for buildng construction, such as tower cranes, hoists, concrete production plants, stationary concrete pumps, etc., differ from the former in several regards, mainly in that they are operating in conjunction with labor crews and their production rate is dictated by that of the latter. These differences, and the consequent modeling modifications called for, are discussed. The analysis emphasizes the general aspects of the findings and of certain elements of the proposed model.