Deck 9: Precast Concrete

Question 1

In what areas do building codes apply with regard to precast concrete construction?

Answer 1

Building codes have extensive specifications pertaining to the design and installation of precast concrete members. In addition to engineering design data, the codes guidelines for reinforcing, connections, lifting devices, fabrication, shop drawings, tendon anchorage, and grouting procedures. The codes also specify the requirements for meeting fire codes.

Question 2

____ connections speed up erection and allow final alignments to be made after the crane has placed the member.

A) Welded
B) Doweled
C) Post-tensioned
D) Bolted

Answer 2

D

Question 3

____ slabs are used for spans ranging up to 40 ft. (12 m) in length and are 6 to 12 in. (150 to 300 mm) thick.

A) Double tee
B) Channel
C) Hollow-core
D) Solid flat

Answer 3

C

Question 4

What is the double-wall precast concrete building system?

Question 5

How are grout, mortar, and drypack used with regard to precast concrete construction?

Question 6

List five advantages of precast concrete units.
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Question 7

____ units are cast in molds in a plant, then cured and shipped to the job site.

A) Pre-stressed
B) Non-pre-stressed
C) Pre-tensioned
D) Post-tensioned

Question 8

____ refers to the equipment, cables, slings, and other hoisting equipment used to lift precast units into place.

A) Placing
B) Transporting
C) Framing
D) Rigging

Question 9

Describe precast concrete columns and their formation with regard to precast concrete construction.

Question 10

Typical ____ connections include the use of dowels or haunches.

A) beam-to-column
B) column-to-column
C) column-to-foundation
D) foundation-to-column