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This spreadsheet will find the flexural capacity of a rectangular concrete beam or 1-way slab. It is solved using LRFD loads.
If the area of steel (A_{s}) is known then it can be entered into the Inputs section, otherwise minimum steel (A_{s-min}) will be used.
The diagram in Figure 1. shows the compression block and tension steel of a concrete beam in a balanced condition. Certain variables are also shown graphically for clarification.
How to Understand this Spreadsheet | |||||||||||||
This spreadsheet works in Microsoft Excel 2007 and later. A complete walkthrough of how this spreadsheet works can be found here for beams and here for 1-way slabs.
The top portion of the spreadsheet allows you to change your inputs:
where:
The bottom portion of the spreadsheet calculates øM_{n} (the factored capacity of the beam using LRFD)
The following notes must be considered when using this spreadsheet: