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By Sara Hart

AIA/Architectural Record Continuing Education

Instructions

• Read the article "Born Again: A New Skin Offers a Fresh Start"
• Complete the questions below, then fill in your answers .
• Fill out and submit the AIA/CES education reporting form in the magazine or print the form to receive one AIA learning unit.

Questions:

LU: 1
HSW: 1

1. The problem of curtain walls having hysteresis is prevalent in which group of buildings?
a. all buildings from the 1960s and ’70s
b. all buildings with a thin marble veneer
c. all buildings with a natural stone veneer
d. marble-veneer buildings with calcite grains and a calcite binder

2. Disaggregation of stone is also known as which?
a. cracking
b. hysteresis
c. sugaring
d. expansion

3. Hysteresis, which is an incurable condition caused by changes in temperature, can be visually detected by all except which?
a. marble panels will be cupped
b. marble panels will show cracked edges
c. marble pieces will fall off the building
d. marble will change to a darker color

4. Hysteresis is caused by which?
a. cutting fine-grain marble into thin veneer
b. microcracking in the calcite binder
c. loss of strength in the marble panel
d. moisture penetration at bowed edges of the marble panel

5. What causes the acceleration of hysteresis?
a. temperature changes
b. exposure to weather
c. extremely dry weather
d. a and b

6. Which material is most prone to hysteresis?
a. thin marble veneer with fine grain
b. thin granite veneer
c. thin marble veneer with coarse grain
d. thin limestone veneer

7. Glass-fiber-reinforced concrete uses fiberglass instead of steel reinforcing, resulting in which benefit?
a. reduction of dead load up to 50 percent
b. reduction of dead load up to 75 percent
c. reduction of freeze-thaw concerns
d. increased stability

8. What material was used for the temporary replacement of the tower panels after the problem was discovered?
a. fiberglass panels
b. aluminum sheets
c. exterior-grade plywood
d. polymer concrete panels

9. Which is not true for both marble and granite?
a. they are natural materials
b. they show the signs of hysteresis
c. they can be mined in the U.S.
d. they show color variations

10. Which was not an advantage of changing the tower cladding from marble to aluminum?
a. column enclosures could be reduced in size
b. corner columns could be removed
c. material waste could be minimized
d. the original look could be maintained

Click here to print the reporting form.