Estimating in Building Construction

220 CHAPTER EIGHTEEN

FIGURE 18.2.Coordination Issues.

Item Coordination Requirements

1. Underground utilities Location, size, excavation by whom, from where?


2. Building Entrance Floor sleeves, supports.


3. Mechanical room equipment Supports required, location, anchors, by whom?


4. Distribution Wall sleeves, hangers, chases, in wall roof, vents,
   access doors.


5. Fixtures Method of support, feed, outlets, built-in, floor
   drains, vents.


6. Finishes Factory or field.


7. Specialty equipment Field provisions, storage.


8. Scheduling Work to be done? When required? Job to be
   completed on time—who, why, when?

18–3 Separate Contracts

The plumbing contractors do the takeoff and bidding. The
estimator for general construction must still check to deter-
mine the areas of mutual responsibility and coordination—
they are similar to those required for the electrical work.
There is always considerable work done in coordination,
wall chases, anchoring supports, sleeves, and many other
items outlined in Section 18–4.

18–4 Coordination Requirements

Figure 18.2 lists the major areas of coordination required
between the plumbing and general contractors.
Once again, coordination among the HVAC and plumb-
ing contractors is also important in the understanding of
who is responsible for what, why, when!

18–5 Checklist

Rough:

permits

excavation and backfill

water, gas, and sewage lines

required pipes and fittings

cleanouts

valves

tanks

sleeves

Finish:

water closets

bath tubs

lavatories

drinking fountains

showers

tubs

service sinks

water heater

urinals

washers and dryers

dishwashers

Miscellaneous:

hookup to equipment

supplied by owner or other contractors may be required

Review Questions

1. How do the various codes affect the installation of the
   plumbing portions of the project?


2. What type of work is most generally included under
   plumbing?


3. Why would an estimator call a subcontractor if it is sus-
   pected that the subcontractor’s bid is too low?
   4. Why should the estimator review the plumbing por-
   tions of the project whether it involves single or separate
   contracts?
   5. How do the various types of construction affect the cost
   of the plumbing work?