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construction cost estimating
Construction Cost Estimating 1st Edition John E. Schaufelberger, Len Holm - Solutions
Why would a GC choose not to own some of the major pieces of equipment discussed in this chapter?
Why are certain pieces of construction equipment included with jobsite general conditions and not attributed to specific scopes of work?
A photograph of a tower crane is included in Chapter 16. What type of tower crane is that: Horizontal jib (also known as a hammer-head) tower crane, self-erecting tower crane, or luffing tower crane?Data from Chapter 16 *>
What work should OM estimates be done for?
Prepare an OM estimate for a system or assembly from one of our case study projects that was not resolved in this chapter, such as the Vehicle project’s metal siding and roofing scopes.
What are two purposes for developing OM estimates?
If you prepared an OM estimate for ACT for $100,000 on your own project and one of the following happens on bid day, what do you do?a. Not one subcontractor bid is received.b. One subcontractor bid of $90,000 is received.c. One subcontractor bid of $110,000 is received.d. Two subcontractor bids are
Where are the results of the OM estimates listed?
Does your answer change in Review Question 6 if it is a slow versus a busy economy, and why?Data from Review Question 6If the GC is confident, it will receive competitive subcontractor bids on items described in this and previous chapters, why is it prudent for the estimator to do a detailed QTO
What are three advantages of using engineered lumber over conventional dimensional lumber?
How many sheets of 5/8″ plywood wall and floor and roof sheeting are required for a two-story house (18′ high exterior walls) with a footprint of 50 feet across the north elevation, 30 feet across the west, 40 feet across the south elevation, and then an inverted jog of 10′ by 15′ on the
Since many GCs employ carpenters, why would they consider subcontracting out any of the work discussed in this chapter? There are many potential answers here.
Prepare a DFH QTO for the Vehicle case study project.
What is the purpose of a recapitulation sheet?
Assuming five craftsmen for each of the crafts in Table 10.2,(A) what would the total blended labor burden percentage markup be?(B) What would happen to that rate if you eliminated the craft with the highest burden percentage and doubled the manpower from the craft with the lowest burden
What is a productivity factor, and what are its units?
If contractors charge a blended labor burden rate to a client and alter their craft mix as discussed in Exercise 1, what would that potentially do to their profit?
If a contractor charges the blended labor burden rate you calculated from Exercise 1.A to a client but applies it to both direct and indirect labor, how would this affect their profit?Data from Exercise 1.AAssuming five craftsmen for each of the crafts in Table 10.2,Table 10.2 Construction
What can a wage rate check indicate?
Which craft in Table 10.2 has the highest:(A) Bare wage rate.(B) Total labor burden.(C) Percentage markup for labor burden, and/or (D) loaded wage rate?Table 10.2 Construction Craft Carpenters Cement Masons Electricians Base Labor Labor Total Loaded Wage Taxes Benefits Burden Wage $41 $8 $13
What customarily happens to labor burden rates journal-entered to a jobsite after employees top $133,000 in wages paid in one calendar year? Is this ethical? How does this affect project profits? How does this affect corporate profits?
What is one of the best sources of information for pricing and productivity factors?
The Lee Street case study project did not include a formal finishes schedule in the contract documents, as the builder was also the developer and the finishes evolved as the building was constructed.Utilize the photographs and drawings from the book’s eResource and prepare a CSI 08 or 09 OM recap
What type of source material is good to use for pricing OM estimates?
If subcontractor prices are received for work usually done as direct work, how should these be handled?
How can the estimator make his or her work easier when preparing OM estimates?
Why is the resilient base estimated separately from the resilient flooring?
If a GC is certain of receiving competitive subcontractor bids on bid day, why should it bother preparing OM estimates? There are several good reasons.
What is the difference between a subcontractor and a supplier? That just answering “labor” is not correct, as suppliers often fabricate materials and deliver them to the jobsite with their own labor.
Which subcontractor connects to the other’s piping work, the site utility subcontractor or the plumbing subcontractor?
Determine an OM estimate for a 2,500-pound capacity hydraulic passenger elevator for a two-story office building. Use commonly available estimating references.
If a building has two stories of underground parking garage, five occupied floors, and a green roof with outdoor spaces for tenants, how many ‘stops’ will an elevator have?
Which costs more per stop, a hydraulic or traction elevator with the same capacity?
Why are small bore pipes and conduits not typically drawn on design drawings?
Have you ever worked on a project with an elevator? Was a down payment made before delivery? How long was the lead time? Was the cab finished per specification, or were upgrades made? Who built the cab upgrades – the elevator subcontractor, or the building finishes subcontractors?
How many sprinkler heads should be estimated for a large assembly room that measures 24 feet by 42 feet?
Determine a reasonable unit price for HVAC of a two-story fire station. What kind of system is this?
Why did we total all of the floor covering OMs in Figure 14.3 together but not the scopes included in Figure 15.1?Figure 14.3Figure 15.1 Project: Carpenters Training Center Location: Kent, WA Arch: LMA CSI 09: Floor coverings Code Description 9.6.1 9.6.2 9.6.2.1 9.6.3 9.6.4 9.6.5 Sheet
Why should a GC estimator prepare an early ROM estimate? Why should they later refine that estimate with subcontractor OM estimates?
How does the cost of the HVAC for a fire station compare with a twostory medical office building, both in unit price and percentage of total building cost?
Envision a 10-foot square office. Look up at the ceiling. Of the MEP systems described in this chapter, what will be located in the center?
Prepare HVAC, plumbing, and electrical subcontractor OM estimates for the Lee Street case study, available on the book’s eResource.
Which is typically one of the first subcontractors to mobilize on a project site and one of the last to leave?
What building labor trades install the work described in this chapter: Elevator, HVAC, plumbing, fire protection, mechanical insulation, mechanical labeling, and electrical?
Why would a GC buy out all of the mechanical systems from one subcontractor or, conversely, separate the work out among several subcontractors? The same question applies to electrical.
Prepare an argument why a GC should partner with MEP and elevator subcontractors in preparation of a competitive bid or, conversely, why they should not partner with these companies.
Mechanical subcontractors may offer ‘balancing’ and ‘commissioning’ as extra services to be included with their scopes. Why should project owners provide these services?
The Lee Street executive townhomes did not include elevators. Assume there was space to add one and a potential buyer wanted to negotiate this high-end addition. Prepare an OM estimate for a small cab hydraulic elevator. Include $5,000 each for an elevator pit and an elevator penthouse.
What CSI division is ‘commissioning’ specified?
Other than the systems described in this chapter, what building features or equipment ‘operate’?
Elevator equipment is often located in a rooftop penthouse. What contractors will typically build the penthouse?
Arrange these electrical activities in the order that the work will be performed: Test, install conduit, pull wire, inspections, install boxes, terminate wire at device and panel, install panel, install device, drill holes in studs and joist (if a wood-framed building).
In addition to elevators, what other systems or equipment may require a substantial down payment from the GC and, in turn, from the project owner?
Significant detail was included with the Vehicle project’s MEP design. Quantify what is available and prepare a pre-bid day GC plug estimate for one of those systems.
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