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"FLRPLATE" is a spreadsheet program written in MS-Excel for the purpose of designing steel checkered floor
plate subjected to uniformly distributed loading.

This program is a workbook consisting of two (2) worksheets, described as follows:

  • Doc - Documentation sheet
  • Steel Floor Plate Design - Steel checkered floor plate design for uniformly distributed loading

All the worksheets are independent and self contained, so that you can move them from one workbook to another. All the worksheets are protected, but not with a password.

Program Assumptions and Limitations:

1.   This program utilizes the formulas given in "Design of Welded Structures" by Omer W. Blodgett (James F. Lincoln Arc Welding Foundation) in Table 1 on page 6.5-4.  The formulas therein were taken from "Formulas for Stress and Strain", by Raymond J. Roark, for rectangular flat plates subjected to uniform pressure. These same formulas are found in "Design of Weldments" by Omer W. Blodgett (James F. Lincoln Arc Welding Foundation) in Table 1 on page 4.6-4 as well.

2.   This program follows the procedures and guidelines of the AISC 9th Edition Allowable Stress (ASD) Manual, (Fourth Impression 9/00), and the "Floor Plate Bending Capacity" Table found on page 2-145 is replicated off of the main calculation worksheet at the right side of the screen.  Also, at the right side of the screen, there are two (2) additional allowable uniform loading tables, one based on flexural strength and the other based on deflection criteria.  Both of these tables consider the user input value of the plate yield stress, 'Fy'.

3.   If the user desires to simulate true one-way span action for the plate analysis and design, then a value of the plate long span, 'L', which is input should be at least 8 times the value of the plate short span, 'S'.

Calculation Reference
AISC Steel Construction Manual
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Submitted On:
01 May 2013
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File Date:
01 May 2013
File Author:
Alex Tomanovich
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89.50 Kb
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stars/5.gifTotal Votes:10
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#4 hades3 2013-12-02 16:12
#3 krugerprojects 2009-07-03 08:33
No metric details!
#2 jpriley485 2009-05-19 11:44
Great spreadsheet! I've used it many times. Thank you, thank you!

Recently, I had the case of 16ga sheet metal spanning 34" x 17". This spreadsheet is bounded at 1/8" on the lower end of thickness, so I had to open Roark and Young (5th ed), where I found something interesting. At the beginning of Ch.10, "Flat Plates", one of the assumptions is ". . . maximum deflection is not more than about one-half the thickness." Perhaps that is the boundary between beam action and catenary action.

Anyway, from here forward I'll use 0.5t as a deflection limit.
#1 MSH 2008-09-09 16:20
After I used, benefited, and enjoyed your spreadsheets, finally I found the time to say, "Thank you".

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