COM624 download and documentation sites

COM624 is a freeware DOS based program for the analysis of lateral loads on piles produced by the FHWA in the USA.  The program and documentation are available for free download, but are well hidden, so I’m posting links to the download sites here:

COM624 Program no longer available; see below

COM624 Manual

In coming posts I will post an Excel based pile lateral load analysis program, based on the same principles as COM624.

Update 10 Mar 2018:

The COM624 program is no longer available for free download, and the link to a commercial download is no loner active.

The link to the manual is still active.

The LatPilePY spreadsheet available here is still free, and provides most of the functionality of the COM624 program, with much friendlier input and output.  Download from the link, and see the Downloads or Downloads by category tabs for more information.

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11 Responses to COM624 download and documentation sites

  1. Pingback: Lateral pile analyis with PY curves … « Newton Excel Bach, not (just) an Excel Blog

  2. DW says:


    I cna;t download com624 manual…

    Please upload com624 manual


  3. Paul Quinones says:

    Sir, I want to download COM624P for my project in school. But it isn’t available anymore on the net. Can you help me? I am trying to design a micropile.


  4. dougaj4 says:

    It seems that COM624 is no longer free, but it is listed here:

    Click to access 2003pricelist.pdf

    My spreadsheet has the same functionality, and much friendlier input and output, and is still free. Just look on the download tab.


  5. mojtaba says:

    OK. Thanks. I write here.
    I have an open section 7sided pile where the profile shape likes “C”. We called it C-pile. I see that your excel sheet is coded for circular piles. If I want to modify the code specially based on this shape what can I do?, I see that putting EI can help physical meaning but what should I do with d(diameter)?

    Moreover, how can I define unembedded length of pile. Normally, P-Y experimental results are based on the location of horizontal load and its deflection. It seems that software is coded based on lateral displacement of pile in surface level. Of course it is doable to transfer a single lateral load to surface level by introducing a moment as an addition, however, how should I do to make comparison between numerical P-Y results of surface and P-Y experimental results of beyond ground level.


    • dougaj4 says:

      The “diameter” is “diameter or width”, so for a non-circular section you should enter the width of the pile, transverse to the direction of the applied force; i.e. the width of the face resisting the load. Note that the soil stiffness tables are for isolated piles; they are not appropriate for piles forming a continuous wall. If you enter a numerical value in the EI data the spreadsheet will use that. It only calculates the EI for a circular or rectangular reinforced concrete section. Also see the notes on the “Function Index” sheet.

      For a pile with a load applied above the ground surface you should apply a combined moment and axial load at the level of the ground surface. For deflections above ground level, you have the deflection, slope and moment at ground level, so its a straightforward calculation to find the curvature, slope and deflection for any point above ground level.


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