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International Concrete Abstracts Portal

Showing 1-5 of 13 Abstracts search results

Document: 

SP107-05

Date: 

June 1, 1988

Author(s):

W. R. Carr

Publication:

Symposium Papers

Volume:

107

Abstract:

This building indicates what can be accomplished when the developer, architect, engineer, and contractor work as a team to determine the most economical frame cost for a project. The shape of this office building was of primary importance to the architect and owner, but it penalized steel construction. The team's willingness to pursue framing methods not usually utilized in Michigan lead to the acceptance of a concrete frame. Other projects have undoubtedly been constructed in steel when concrete would have been a more economical alternative. If contractors are to fulfill their commitment to owners, they must be aware of market conditions and market changes. The best system for the last project may not be best for the next. Awareness of new construction methods--and a willingness to utilize them when appropriate--is an important feature for general contractors to contribute to the building team.

DOI:

10.14359/3360


Document: 

SP107-04

Date: 

June 1, 1988

Author(s):

M. A. Riusillo

Publication:

Symposium Papers

Volume:

107

Abstract:

The lift-slab method of construction, developed 38 years ago in Texas, has undergone detail changes and modernization of equipment over the years. The basic concept however, remains the same. The flat, concrete floor and roof slabs, usually post-tensioned, are poured one on top of the other at ground level, using the slab on ground as the first soffit form. After all the slabs are poured, they are lifted from above using synchronized hydraulic jacks located on the columns. Floor slabs with as many as 32 columns and 25,000 ftý can be lifted in one piece, while larger floor areas would require sectioning. The economical range of lift-slab construction is from 3 to 20 stories with 5 to 12 story buildings being the most common. The economy is inherent in the fact that reinforcing and concrete work are done at ground level, and that 90 percent of the form work is eliminated. Economy, flexible design, and quality construction, along with clean, safe, and efficient working conditions are all reasons to investigate lift-slab construction for multistory housing, offices, and parking garages.

DOI:

10.14359/3353


Document: 

SP107-12

Date: 

June 1, 1988

Author(s):

M. Linetsky

Publication:

Symposium Papers

Volume:

107

Abstract:

Presents design and applications of machinery for on-site manufacture and erection of concrete wall panels and roof slabs to create single-story buildings. The precast components are produced and erected with trailer-mounted rotatable and lifting forms. The basic plant requires two or more technological cycles to erect a bay, while a modified version can build a single-room bay in one cycle. Sizes of the bays and design of the structures are intended to meet housing requirements in developing and industrialized countries. Due to the simplicity of the design, high productivity of the machinery and diversity of the product, the suggested forming system can be an effective craneless method of precast concrete construction.

DOI:

10.14359/3386


Document: 

SP107-01

Date: 

June 1, 1988

Author(s):

W. R. Anthony

Publication:

Symposium Papers

Volume:

107

Abstract:

This text moves from a macro view of the entire building process toward a micro view of the specific details, in an effort to maximize the value of a site-cast concrete building frame. It starts with an economic overview of the development process, including a budget analysis of a concrete framed building. A case is made for three basic principles that lead to constructability, allowing for efficiency during the construction of a site-cast concrete building from a formwork perspective. The text focuses on both horizontal and vertical design strategies, then attempts to integrate these concepts into a total project strategy using a 10-step approach. This paper stresses the need for teamwork. Teamwork is the key to achieving economy in the construction process, and good communications among all parties facilitates the team effort. The text is the product of a collaborative effort by the concrete construction division of a corporation. Their findings and recommendations were organized and integrated by the author. Additional resources are noted at the end of the article.

DOI:

10.14359/3339


Document: 

SP107-07

Date: 

June 1, 1988

Author(s):

C. H. Murphree

Publication:

Symposium Papers

Volume:

107

Abstract:

Forming economical concrete is discussed from the contractor's viewpoint. Two major concrete projects are used to compare manufactured and job-built systems for economy and quality. The contractor reveals his estimated and actual prices. The re-use of form panels, up to 72 times, produces real economy and achieves quality. The "team approach" in selecting the right system is used and recommended.

DOI:

10.14359/3635


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