| 1. |
What type of wood was used for the diagonal bracing member? |
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CMU blocks |
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2×4 |
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Southern Yellow Pine (SYP) OSHA scaffold plank |
| 2. |
What was required by the contract documents for quality assurance during construction? |
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Independent testing company to perform site inspections and testing |
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Architect to perform periodic visual observations of the structure after construction. |
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Contractor to perform site inspections and testing |
| 3. |
How many employees were killed during the collapse of the east wall? |
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one |
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Four |
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two |
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three |
| 4. |
One of the purpose of structural analysis was to determine whether the installation of the temporary bracings was properly done in accord with the applicable industry standards.
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True |
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False |
| 5. |
What was the maximum spacing of the control joints specified by the architect for the CMU walls?
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40" on center |
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25’ on center |
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6 bracings |
| 6. |
How could the incident have been prevented? |
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By reducing the lateral wind load on the wall. |
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By placing the rebar dowels correctly in the footing at the center of the wall. |
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By using stronger materials in the construction of the wall. |
| 7. |
How many exterior braces were removed from the east wall prior to the collapse? |
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All three |
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Two |
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None |
| 8. |
What was the cause of the incident in the CMU wall? |
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The masonry did not gain adequate strength in 15 days. |
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The overturning moment due to lateral wind load was higher than the resisting moment induced by the self-weight of the CMU wall. |
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The dowel reinforcements were misplaced to the center of the wall. |
| 9. |
What type of detail is shown in this figure?
 |
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Beam column joint detail |
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Control joint detail |
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Bracing detail |
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All of the above |
| 10. |
What caused the collapse of the east wall? |
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Human error |
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Strong winds |
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Earthquake |
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Heavy rain |
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