Formwork for concrete structures by Garold (Gary) Oberlender, Robert Peurifoy
By Garold (Gary) Oberlender, Robert Peurifoy
The definitive consultant to formwork layout, fabrics, and methods--fully updated
Formwork for Concrete Structures, Fourth version, presents present details on designing and construction formwork and transitority buildings throughout the building procedure. constructed with the newest structural layout ideas by means of the nationwide layout Specification (NDS 2005), the e-book covers contemporary advances in fabrics, cash- and energy-saving recommendations, safeguard instructions, OSHA rules, and dimensional tolerances. up to date pattern difficulties illustrate functional functions for calculating a lot and stresses. This entire handbook additionally contains new precis tables and equations and a listing of providers.
Formwork for Concrete Structures, Fourth variation, covers:
- Economy of formwork
- Pressure of concrete on formwork
- Properties of shape fabric
- Form layout
- Shores and scaffolding
- Failures of formwork
- Forms for footings, partitions, and columns
- Forms for beams and ground slabs
- Patented kinds for concrete flooring platforms
- Forms for thin-shell roof slabs
- Forms for architectural concrete
- Forms for concrete bridge decks
- Flying deck forms
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Additional info for Formwork for concrete structures
Examples of these concepts, excerpted from ref. , are presented in this chapter to illustrate how economy in formwork may be affected. Design Repetition Any type of work is more efficient if it is performed on a repetitive basis. Assembly line work in the automobile manufacturing industry is a good example of achieving efficiency and economy by repetition. This same concept can be applied to the structural design of concrete structures. Repeating the same layout from bay to bay on each floor provides repetition for the workers.
25 in. wide. Any necessary compensation in the strength of the beam resulting from a change in the dimensions may be made by modifying the quantity of the reinforcing steel, or possibly by modifying the depth of the beam. Economy of Formwork Dimensional Consistency For concrete structures, consistency and simplicity yield savings, whereas complexity increases cost. Specific examples of opportunities to simplify include maintaining constant depth of horizontal construction, maintaining constant spacing of beams and joists, maintaining constant column dimensions from floor to floor, and maintaining constant story heights.
This is done under the pretense that the minimum size and least weight result in the best design. However, this approach to design neglects the impact of the cost of formwork, the temporary support structure that must be fabricated and installed to support the permanent materials. Focusing only on ways to economize on permanent materials, with little or no consideration of the temporary formwork, can actually increase, rather than decrease the total cost of a structure. To concentrate solely on permanent material reduction does not consider the significant cost of the formwork, which often ranges 7 8 Chapter Two from one-third to one-half of the total installed cost of concrete structures.