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Collapse of Building under Construction


Quiz Questions

1. What was the reason for the partial collapse of the building?
The structural design was not in accordance with the applicable building code.
The cold-formed steel joists were not strong enough to support the intended loads.
The floor joists were not braced during construction.
2. What type of steel joists were used to frame the floors of the building?
JoistRite sections
C-Channel sections
SteelSpan sections
SteelMaster sections
3. What kind of concrete masonry blocks were used for the front and rear walls in the Carlton Row Townhouses project?
10” solid blocks
8” hollow blocks
8” solid blocks
4.

How many employees were affected by the collapsing floors?

One
Two
Three
Four
5.

What were the dimensions of each townhouse unit in the Carlton Row Townhouses project?

Approximately 191⁄2 ‘ x 52’
Approximately 98′ x 53′
Approximately 10” deep x 52′
6. What was the reason for the special inspector’s poor performance?
He recommended the use of steel deck instead of plywood
He failed to perform any inspections on the building
He certified that the floor joists had been placed according to the requirements of the documents.
He recommended the use of fiber deck instead of plywood
7. How much does one pallet of cement bags weigh?
1000 pounds
4000 pounds
3000 pounds
2200 pounds
8. What caused the partial collapse of the building?
The masonry contractor placing excessive construction materials on the 4th floor
None of the above
The special inspector performing poorly and providing misleading reports
Both a and c
9. What type of detail is shown in the below image?

Collapse of Building under Construction
Temporary steel deck on 225 Carlton Ave. supporting construction loads
Floor joists with no straps at the top flange
Floor joists with straps only at the bottom flange
Floor joists spaced at 16” o/c
10. The pallets of cement bags and jumbo bags of sand delivered to the 4th floor deck by __________________?
They were directly lowered on the deck by the crane
They were manually unloaded by the helpers and dispersed to various locations on the deck
They were transported using a elevator

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