COST CONTROL QUESTIONS: 21-40

1. COST CONTROLQUESTIONS: 21-40 2/28/08 CHAPTER 3

2. Is it necessary to use both systems? • Why? • What are the advantages of MasterFormat?

3. What are the disadvantages of MasterFormat? • What are the advantages of UNIFormat? • What are the disadvantages of UniFormat?

4. What is the Pareto’s principal? • List the cost drivers:

5. What is the most significant program driver? • What are the cost drivers for program?

6. What are the values used to establish a wall’s thermal performance? • Thermal performance is entirely what?

7. The U-VALUE •               Understanding U-valuesThe U-value measures how well a building component, e.g. a wall, roof or a window, keeps heat inside a building. For those living in a warm climate the U-value is also relevant as it is an indicator of how long the inside of the building can be kept cold. Comfortable indoor climate with good U-valuesIn both cold and warm climates good U-values are important measures for understanding the amount of energy that is needed to keep a comfortable inside temperature. Learn more about why u-values matter. • TAKEN FROM: http://www.builddesk.co.uk/sw56126.asp

8. The U-VALUE • What is the U-value?The U-value is a measure of the heat flow through a building element as illustrated in the figures to the right. The higher the U-value the more heat flows through so a good U-value is a low one as you want to keep heat inside the building or outside depending on the climate you live in. See u-values in action.TAKEN FROM: http://www.builddesk.co.uk/sw56126.asp

9. The U-VALUE • The technical explanation of the U-valueGetting a little technical the U-value physically describes how much thermal energy in Watts [W] is transported through a building component with the size of 1 square meter [m²] at a temperature difference of 1 Kelvin [K] (=1ºC). Thus the unit for U-values is W/(m²K). So what is a good U-value? For external walls, roofs, etc. a U-value of less than 0.2 W/(m²K) can be called good. This value can be reached by using thermal insulation with a thickness of about 20 cm or more. For windows the U-value should be less than 1.0 W/(m²K). • TAKEN FROM: http://www.builddesk.co.uk/sw56126.asp

10. R-VALUE • A material’s R-value is the measure of its resistance to heat flow. • It is important to know the R-value because many states or regions require that a roof system have a minimum amount of thermal resistance on commercial, industrial, and/or institutional buildings. The way it works is simple: the higher the R-value, the more the material insulates.  

11. MORE DEFINITIONS: R-value • A measure of the heat conductivity of material. The higher the R value, the better the material serves as insulation from heat transfer. R value generally applies to insulating materials, roofs, exterior walls, and windows and doors.Example: The walls in a building have an estimated R value of 20. Fiberglass insulation with an R value of 34 was installed in the walls to make the building more energy efficient. • A measure of the thermal resistance of a material or component.

12. Which system would one use for establishing detailed estimates? • Which format would you use for conceptual estimating?

13. Which format is effective for comparing competing designs? • Which format allows for comparisons and analysis of various building components? • Which format is excellent for design-phase cost control purposes?

14. Using MasterFormat a steel-framed building could be compared to a concrete-framed building in a fair and equitable way, as could multiple wall system alternates, both for initial cost as well as life-cycle considerations. • True or false?

15. Which format is valuable for use in assembling and maintaining historical project information? • Construction phase is to MasterFormat as Uniformat is to____________.