Estimating in Building Construction

(Kalthiya AryanmXZGQq) #1

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?

Free download pdf