Question 1

Which floor system-one- way joist floor or two- way joist floor-is more commonly used in contemporary concrete construction and why?

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Question 2

Using sketches, explain the commonly used beamless concrete floor systems.

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Question 3

The posttensioning of elevated concrete floors reduces the slab and beam dimensions. This reduces the cost of concrete and reinforcing bars but is compensated for by the added cost of posttensioning steel and the use of more skilled (posttensioning)labor. So, why is posttensioning of concrete structures so popular.

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Question 4

A flat- plate or a flat- slab floor is a beamless concrete floor. However, in many situations, such floor slabs are often provided with shallow perimeter beams. What is that in response to?

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Question 5

Name two commonly used precast concrete elements used as structural floors.

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Question 6

What is the difference between structural precast concrete and architectural precast concrete?

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Question 7

What is the other commonly used term for a two- way joist floor?

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Question 8

In which situations are inverted- tee beams used?

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Question 9

Explain the difference between total precast and a mixed precast construction.

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Question 10

Concrete construction can either be done as cast- in- place concrete or precast concrete. Give three disadvantages of precast concrete.

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Question 11

Concrete construction can either be done as cast- in- place concrete or precast concrete. Give three advantages of precast concrete.

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Question 12

What is the difference between a flat plate concrete floor and a flat slab concrete floor?

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Question 13

What is the cross- sectional shape of pans in a two- way concrete joist floor system?

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Question 14

Sketch the following precast concrete structural members:
a. Hollow- core units
b. Solid planks
c. Double- tee units
d. Inverted- tee beams

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a....

Question 15

Name the factors that affect the fire resistance of reinforced or prestressed concrete members.

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Question 16

In the case of a one- way joist floor system, the joists span in one direction and the beams span in the other (perpendicular)direction. If the two spans are unequal, in which direction (shorter or longer)should the beams span and why?

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Question 17

Using sketches and notes, illustrate the two most commonly used reinforced- concrete floor systems.

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Question 18

Using sketches and notes, explain beam- and- girder floor systems.

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Question 19

Why is the one- way joist floor a popular structural system in concrete construction?

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Question 20

Explain the difference between one- way slab and two- way slab actions.

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Quiz 23: Concrete Construction-II Site-Cast and Precast Concrete Framing Systems