COST CONTROL QUESTIONS: 2140

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 Paretos 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 walls
  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

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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/sw
  56126.asp

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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

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R-VALUE

• A materials 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.  

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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____________.