Quantcast Detailed Estimating Criteria

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incidental to the electrical or mechanical work which, following trade practice, are normally
quoted and performed by those contractors.
9.2.4 Detailed Estimating Criteria
Provide the name of the person(s) and the firm with primary responsibility for preparation
and checking on each estimate sheet. To facilitate comparison of estimated costs with the
contractors' costs, follow construction trade practice. The first step in estimating cost is to
decide what size and type of contractor is in the best position to be most competitive for
the project under consideration. This decision will permit a determination of which items of
work will be done by the prime contractor and which items are likely to be subcontracted.
The appropriate markups for material and labor can then be developed. Use local costs
including the appropriate material or equipment costs (so note in parentheses). This is
mandatory, and failure to comply may be reason for rejection of estimate. Include costs
such as subsistence, transportation and the premium portion of overtime in General
Requirements. Include incidental demolition, excavation, shoring, de-watering, concrete
and miscellaneous metal for the mechanical and electrical sections in the mechanical and
electrical estimates. Include everything, and duplicate nothing. Provide a cross reference
note in the applicable work breakdown structure section estimate. For example, the first
item under CIP Concrete might be "see electrical estimate for duct bank encasement".
9.2.4.1 San Clemente Island / San Nicolas Island
The rules under which the Contractor works are set forth in the specification. The costs for
subsistence, travel, travel time, premium portion of overtime and shipping are substantial
and should be included in the General Requirements. Review any questions with Code
04CN, in order to understand and cost these items as a contractor would do so.
9.2.4.2 Units of Measure
Use standard units of measure common to the trade involved. The units used shall be
those used in purchasing the principal material involved. Sufficiently describe the size,
material, quality and type of items, or tasks to be performed in the item description to
permit unit cost verification without constant reference to plans and specifications. Failure
to do so may be grounds for rejection of the estimate. The accuracy of quantity take-offs
should be carefully verified. Include a reasonable allowance for waste where applicable
(concrete piping, etc.). Please include guidance for projects to be designed in SI units.
See Section 5.2.3.
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