Question 1

A band beam floor is generally more economical than a beam- and- girder floor because

Accepted Answer

A) it requires a smaller quantity of reinforcement. 
B) it requires a smaller quantity of concrete. 
C) its formwork is more economical. 
D) none of the above. 
A) it requires a smaller quantity of reinforcement. 
B) it requires a smaller quantity of concrete. 
C) its formwork is more economical. 
D) none of the above. C

Question 2

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

Accepted Answer

Beam-and-girder floor systems are a type of structural system commonly used in building construction. This system consists of a series of horizontal beams and girders that support the weight of the floor and any loads placed on it.

The beams are the primary horizontal members that span between columns or walls and support the girders. The girders, in turn, support the beams and transfer the load to the columns or walls. This creates a grid-like pattern of support throughout the floor, allowing for efficient distribution of the load.

Sketches and notes can be used to illustrate how the beams and girders are arranged and connected within the floor system. This can help to visualize the overall layout and understand how the system functions to support the structure above.

In addition to providing structural support, beam-and-girder floor systems also allow for flexibility in the layout of the floor space below. Because the beams and girders can span long distances, they can create open floor plans without the need for interior support walls or columns.

Overall, beam-and-girder floor systems are a versatile and efficient way to support the weight of a building's floors while also allowing for flexibility in the design of the space below. Sketches and notes can be valuable tools for understanding and communicating the details of these systems in building construction.

Question 3

In a one- way joist floor, the supporting beams run in one direction and the joists run in the other direction. If the spans in the two directions are unequal, the beams should preferably span along the

Accepted Answer

A) shorter direction. 
B) longer direction. 
A) shorter direction. 
B) longer direction. A

Question 4

In which situations are inverted- tee beams used?

Accepted Answer

To support

Question 5

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.

Accepted Answer

A major advantage of reduced structural

Question 6

Portland cement used in precast concrete members is generally

Accepted Answer

A) Type I. 
B) Type V. 
C) Type III. 
D) Type IV. 
E) Type II. 
A) Type I. 
B) Type V. 
C) Type III. 
D) Type IV. 
E) Type II.

Question 7

A flat plate floor consists of

Accepted Answer

A) a slab with drop panels at each column. 
B) a slab of constant thickness. 
C) a slab with beams on all four sides of the slab panel. 
D) none of the above. 
A) a slab with drop panels at each column. 
B) a slab of constant thickness. 
C) a slab with beams on all four sides of the slab panel. 
D) none of the above.

Question 8

The fire- resistance rating of concrete members is a function of

Accepted Answer

A) concrete cover for corrosion protection. 
B) type of coarse aggregate in concrete. 
C) member thickness. 
D) all of the above. 
A) concrete cover for corrosion protection. 
B) type of coarse aggregate in concrete. 
C) member thickness. 
D) all of the above.

Question 9

What is the center- to- center spacing of joists in standard- module, one- way joist floors?

Accepted Answer

Standard- module, on

Question 10

A wide- module one- way joist floor is constructed using pans that are

Accepted Answer

A) 53 in. wide. 
B) 60 in. wide. 
C) 66 in. wide. 
D) A or B. 
E) A or C. 
A) 53 in. wide. 
B) 60 in. wide. 
C) 66 in. wide. 
D) A or B. 
E) A or C.

Question 11

The most commonly used width of a double- tee floor unit is

Accepted Answer

A) 8 ft. 
B) 4 ft. 
C) 6 ft. 
D) none of the above. 
A) 8 ft. 
B) 4 ft. 
C) 6 ft. 
D) none of the above.

Question 12

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?

Accepted Answer

If the spans are unequal, the

Question 13

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?

Accepted Answer

To support

Question 14

What is the width of pans in standard- module, one- way joist floors?

Accepted Answer

20 in. for joists sp

Question 15

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

Accepted Answer

Because the formwork required

Question 16

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

Accepted Answer

(i)Cost of transportation is high becaus

Question 17

A reinforced- concrete, four- side- supported slab panel measuring 15 ft × 22 ft is

Accepted Answer

A) a one- way slab. 
B) a two- way slab. 
C) a four- way slab. 
D) A or B. 
E) none of the above. 
A) a one- way slab. 
B) a two- way slab. 
C) a four- way slab. 
D) A or B. 
E) none of the above.

Question 18

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

Accepted Answer

The answer of What is the other commonly used term...

Question 19

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

Accepted Answer

One- way joist floor is more c

Question 20

Commonly used beamless concrete floors are

Accepted Answer

A) beam- and- girder floors. 
B) flat- plate and flat- slab floors. 
C) one- way and two- way joist floors. 
D) all of the above. 
A) beam- and- girder floors. 
B) flat- plate and flat- slab floors. 
C) one- way and two- way joist floors. 
D) all of the above.

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

A band beam floor is generally more economical than a beam- and- girder floor because

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

In a one- way joist floor, the supporting beams run in one direction and the joists run in the other direction. If the spans in the two directions are unequal, the beams should preferably span along the

In which situations are inverted- tee beams used?

Portland cement used in precast concrete members is generally

A flat plate floor consists of

The fire- resistance rating of concrete members is a function of

What is the center- to- center spacing of joists in standard- module, one- way joist floors?

A wide- module one- way joist floor is constructed using pans that are

The most commonly used width of a double- tee floor unit is

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?

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?

What is the width of pans in standard- module, one- way joist floors?

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

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

A reinforced- concrete, four- side- supported slab panel measuring 15 ft × 22 ft is

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

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

Commonly used beamless concrete floors are

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Properties of the Envelope-I Thermal Properties

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Principles of Joints and Sealants Expansion and Contraction Control

Principles of Sustainable Construction

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