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<br />32 <br /> <br />CONSULTING ENGINEERING <br /> <br />These curves afford compensation only for the basic services outlined in <br />Section ll. Tbe special services, also descrihed in Section II, may add substan- <br />tially to the total engineering cost of the project. These special services are <br />furnished either directly by the Client, or by the Consulting Engineer, usually on <br />the basis of salary cost times a multiplier. For special services, the multiplier <br />averages 2.4, except for field staff employed for the purposes of the assignment, <br />when the multiplier averages 2.3. Direct non-salary costs for special services are <br />reimbursed at invoice cost plus a surcharge for overhead and handling of from <br />10% to 15%. <br />Curve A in Fig. I is intended to apply to assignments of which the following <br />are typical examples: <br />a. Airports with extensive terminal facilities; <br />b. Water, wastewater, and industrial waste treatment plants; <br />c. Bridges which are asymmetric or are otherwise complicated; <br />d. Public and office buildings; <br />e. Power plants; <br />f. Large dams or complicated small dams; <br />g. Highways' and urban and suburban arterial streets; <br />h. Grade crossing eliminations; <br />I. Highway and railway tunnels; <br />j. Pumping stations; <br />k. Incinerators; <br />]. Intercepting and relief sewers; <br />m. Sanitary sewer lines under 24 in. in diameter; <br />n. Water distribution lines under 16 in. in diameter; <br />o. Complicated waterfront and marine teoninal facilities; <br />p. Foundations; <br />q. Large sports stadia; and <br />r. Additions to or reconstruction of projects classified in Curve B. <br />Curve B in Fig. 2 is intended to apply to iess complex assignments of which <br />the following are examples: <br />a. Industrial buildings, warehouses, garages, hangars, and comparable struc- <br />tures; <br />b. Bridges and other structures of conventional design; <br />c. Simple waterfront facilities; <br />,,~d. Railways; <br />,e. Roads and streets; <br />J. Conventional levees, flood walls, and retaining walls; <br />g. Small dams; <br /> <br />*Extensive pertinent infonnation regarding these classifications may be found in the current <br />edition of the American Road Builders' Association Technical Bulletin No. 253. ARBA, 525 <br />School Street. S.W., Washington. D,C. 20024. <br />