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Plumbing Heating And Piping

4.55. Plumbing Fixtures

The general discussion of equipment setting, Art. 4.47, does not necessarily hold true for standard-type plumbing fixtures. Averages of required man-hours for setting can be established. The following presentation of data on this item of cost is made in two separate tables:

Table 7.46 classifies fixtures into various categories such as bath tubs, lavatories, sinks, etc. A code number is given to include all fixtures of a specific category requiring approximately the same number of man-hours setting labor. As an example, the code number P-l indicates a recessed bathtub, angle type, with overrim filler, shower and diverter valve, and shower curtain. Code number P-101 indicates a vitreous china or cast-iron enamel lavatory with legs, towel bars, flexible supplies, stops, or vitreous china lavatories with pedestal, flexible supplies, and stops.

Table 7.47 gives the man-hours per fixture for setting these various code-numbered fixtures. These labor factors include the job handling and distribution of the fixtures, the hanging or setting, and the connecting. It is presumed that the rough-in of waste, water, etc., is complete to the wall or floor as the case may be. To use these tables, it is first necessary to determine the code number of the fixture involved by the use of the description in Table 7.46. When this code number is known, Table 7.47 may be used to determine the labor factor based on job efficiency.

It will be noted that the labor factors given in Table 7.47 include the labor for the handling, storage, and distribution of the fixtures throughout the job. This same element of cost will naturally influence the selection of E. It is quite conceivable that conditions affecting the storage and distribution could be such that E = 1.5 might be required even though the over-all job efficiency might be 1.0. This should be given careful consideration by the estimator, bearing in mind that the labor factors given for E = 1.0 are only averages.

Heating and Piping Estimate and Bid Summary

5.1. General Discussion

The heating and piping sections of an estimate for mechanical contract work are combined in this book because of the nature of these two classes of work. Basically, it may be said that work on a strictly piping or industrial piping project will follow the same pattern as the pipework making up a typical heating system for the average building. As an example, from an estimating standpoint, a compressed-air line running down through a building with branches to various pieces of equipment is not too different from a steam-heating main with branches to various pieces of heating equipment. It is understood, of course, that there will be systems or types of systems which will require use of information contained in the chapters of this book concerned primarily with plumbing work. In a general sense, this information will not be repeated since it is readily available in other sections. However, for the purpose of clarity, some information, such as descriptive matter pertaining to the bid summary, will be given here.