Fundamentals of Building Construction
Fundamentals of Building Construction
6th Edition
ISBN: 9781118138915
Author: Edward Allen
Publisher: WILEY
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Question
Chapter 15, Problem 1RQ
To determine

Explain under what circumstances precast concrete framing system is used instead of site cast system and specify where the site cast systems are utilized.

Expert Solution & Answer
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Explanation of Solution

Precast concrete framing system:

The entire elements of a structure can be fabricated off-site; structural components are attached into a structure on-site. The elements of a precast slab are frequently utilized with other vertical loadbearing systems like site cast concrete and reinforced steel. The choice of roof and floor slab elements mainly depends on span requirements.

Circumstances that precast concrete framing system are as follows:

  • Ideal condition of curing is required to obtain the designed strength.
  • It is suitable where the rapid erection of structure is needed.
  • It is suitable for all-weather construction capability.
  • It is suitable for a structure that has reduced dead weight.
  • It is the best option when the quality of concrete and slenderness of the structure are important considerations.

Site-cast concrete framing system:

It is just opposite to precast concrete framing, and it is otherwise called as in-situ concrete. It is normally poured, molded, and cured on site.

Circumstances that site cast system are as follows:

  • It is the best method for small scale projects because it is less expensive.
  • It provides greater resistance against earthquake; so, it is usually a preferred option.
  • This type is utilized where the unusual shapes must be spanned, and sculptural forms are to be created.

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