SP-004: (8th) Auto Reshore Excel Spreadsheet

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This series of Excel spreadsheet programs allows the user to perform the shoring and reshoring analysis of multi-story concrete buildings during construction. The programs provide both numerical results and an illustration of the step-by-step construction process. The programs are based on the typical assumptions used in ACI SP-4 Formwork for Concrete, 8th ed., and in ACI 347.2R-05 Guide for Shoring/Reshoring of Concrete Multistory Buildings.

- All previously cast slabs are identical and have equal stiffness;

- Ground level or other grade base support is rigid;

- Shores and reshores are spaced closely enough to treat their reactions as a distributed load;

- Shores and reshores are infinitely stiff relative to the slabs; and

- Reshores are installed snug tight without initially carrying any load.

The user must check all results prior to any application.The results are a function of the analysis assumptions and actual conditions can vary. For example, some studies, as noted in ACI 347.2R, have indicated that compressible shores and reshores cause greater load to be supported by the uppermost, lowest-strength, hardened slab than is indicated by an analysis based of infinite shore/reshore stiffness. Revised versions of the spreadsheet may be issued periodically.

Keywords: (Suggested New) architectural concrete; bridge construction; building construction, concrete construction; construction; construction loads; construction materials; falsework; forms; formwork; formed surfaces, mass concrete; precast concrete; prestressed concrete; quality control; reinforced concrete; reshoring; shoring; slipform construction; tunnels


Document Details

Author: Michael P. McGurl, David W. Johnston

Publication Year: 2014


Categories: Formwork

Formats: Excel


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