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<br />34 <br /> <br />CONSULTING ENGINEERING <br /> <br />percentage or fIxed compensation shall apply and that the Engineer shall be <br />reimbursed for services in excess of the specifIed period of time at an agreed cost <br />or at salary cost times a multiplier plus expenses, as agreed on at the time the <br />Engineer's contract is negotiated. <br /> <br />Repetitive Structu res <br />When projects include a number of substantially identical units, such as a <br />series of buildings or warehouses and if a single set of drawings can be used for <br />the identical units, it may be feasible to reduce the part of the basic compensation <br />applicable to the multiple units. <br />Most construction involves repetitive elements. The curves of median com- <br />pensation take this fact into consideration. Reduction of the basic compensation <br />hecause of repetitive structures should therefore be limited to assignments where <br />such structures comprise a considerable part of the cost of project. Such a <br />reduction reflects the saving in engineering design costs resulting from the multi- <br />plicity of identical units. In some cases, this saving may amount to as much as <br />one-half of the compensation for design applicable to the identical units, where, <br />say, fIve or more such units are involved. No reduction in compensation for the <br />construction phase is applicable to repetitive structures. <br />Repetitive Use: To avoid the possibility of misunderstaoding for repetitive use <br />of the same designs at other locations see Section VI which follows. <br /> <br />Alterations and Changes <br /> <br />Alterations and changes to existing structures and facilities necessitate sub- <br />stantially more services than new work. Basic compensation for alteration work <br />may be increased by at least one.third above the median compensation illustrated <br />by curves A and B. <br /> <br />Highway, Interprofessional, and Specialty Practices <br />The foregoing discussion of the percentage-of-construction-cost method of <br />computing charges contemplates that the Consulting Engineer will perform sub- <br />stantially all of the three phases of the basic services and such special services as <br />may be required for a given assignment. There are many important fIelds of <br />engineering practice in which the Consulting Engineer performs services for <br />both public and private Clients as well as for other professionals who also have <br />competent engineering or inspection staffs, and who may wish to perform certain <br />engineering functions on a project with their own organizations. The omission of <br />these functions from the Consulting Engineer's assignment, and the inclusion of <br />special services which may actually exceed the value of the remaining basic <br />services, present a situation in which the direct application of the percentage <br />curves (Figs. I and 2) is impractical. <br />(a) Highway <br />In express highway work, special services required to make transportation and <br />traffic studies, to satisfy future land use, social and economic requirements, and <br />