{"id":32980,"date":"2026-04-27T12:34:34","date_gmt":"2026-04-27T12:34:34","guid":{"rendered":"https:\/\/protasoftware.com\/technical-manuals\/fe-analysis-of-foundations\/raft-foundation-and-piled-raft-foundation-analysis-design-example\/"},"modified":"2026-06-19T12:37:49","modified_gmt":"2026-06-19T12:37:49","slug":"raft-foundation-and-piled-raft-foundation-analysis-design-example","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/wiki\/raft-foundation-and-piled-raft-foundation-analysis-design-example\/","title":{"rendered":"Raft Foundation And Piled Raft Foundation Analysis Design Example"},"content":{"rendered":"
\n

Raft Foundation Example
<\/span><\/h1>\n
This example is based on the "Quick Start Guide Concrete Complete" model which is automatically installed in the default ProtaDataXXXX folder.
<\/span><\/div>\n
In this example we will be inserting a raft foundation and then piled raft foundation underneath the shear wall lift core. <\/span><\/span>
<\/span><\/div>\n
The raft foundation is created as slabs and then analyzed using Finite Element Foundation Analysis.<\/span><\/span><\/div>\n
\n

Foundation Design Settings & Raft Modelling<\/span><\/span>
<\/span><\/h1>\n
  >> <\/span><\/b> <\/span>Ensure that Building Analysis is successfully completed. <\/span><\/span> <\/span> <\/span><\/b>
<\/span><\/div>\n
  >> <\/span><\/b> <\/span>Go to <\/span><\/span> <\/span>Foundation Design Settings<\/span><\/b> <\/span> > <\/span><\/span> <\/span>General tab<\/span><\/b> <\/span>. These settings generally affects the FE Raft Foundation analysis & Design. <\/span><\/span><\/div>\n
<\/div>\n
<\/div>\n<\/div>\n
  >> <\/span><\/b>Change <\/span>Allowable Stress of Soil<\/span><\/b> to <\/span>150 <\/span><\/b>kN\/m2 > Click <\/span>OK <\/span><\/b>to save and exit. 
<\/span><\/div>\n
  >> <\/span><\/b> <\/span>Go to <\/span><\/span> <\/span>Storey : 0 (Plan) view<\/span><\/b> <\/span> – as all foundation elements can only be modelled in Storey 0 (foundation level). <\/span><\/span><\/div>\n
  >><\/span><\/b> Create a<\/span> 400mm<\/span><\/b> deep slab <\/span> <\/span><\/b>cover inside the lift core (<\/span>Type 1, Cover = 100mm<\/span><\/b> & Dead\/Imposed Load =<\/span> 0<\/span><\/b>) <\/span><\/span><\/div>\n
<\/div>\n
<\/div>\n<\/div>\n
\n
\"Info\" <\/p>\n
Soil Subgrade Coefficient<\/b> (soil stiffness) is automatically fetched from Foundation Design Settings<\/a>.  User can check " User Defined<\/b>" & manually input a different coefficient. <\/div>\n

<\/span><\/div>\n

  >> <\/span><\/b> <\/span>Create <\/span><\/span> <\/span>500 mm<\/span><\/b> <\/span> wide cantilever slabs around the edge of the core (change to <\/span><\/span> <\/span>Type 12 <\/span><\/b>& <\/span>c<\/span>lick along the edge of the corewall)<\/span><\/span><\/div>\n
<\/div>\n
<\/span><\/span><\/div>\n

<\/span><\/span><\/div>\n<\/div>\n
\n
\"Idea\" <\/p>\n
Any shape of slabs can also be created using the function<\/span> Slab\/Column Edge <\/a> <\/div>\n

<\/span><\/div>\n

FE Raft Foundation Analysis <\/span><\/span>
<\/span><\/h2>\n
The raft can now be analyzed. <\/span><\/div>\n
>><\/span><\/b> From the<\/span><\/span> <\/span> Analysis <\/span><\/b> <\/span>tab <\/span>><\/span><\/b> click <\/span><\/span>FE Raft Foundation Analysis<\/span><\/b> <\/div>\n<\/div>\n
\n
<\/div>\n
<\/div>\n
<\/div>\n
\"Notes\" <\/p>\n
Use the Subgrade Reaction Values Assigned to Slabs for Soil Stress Checks<\/span><\/b> <\/span>: <\/span><\/b>If checked, user-defined subgrade coefficient in Slab Properties will be used. 
<\/span><\/div>\n
The mesh options are similar to FE Floor Analysis options.<\/span> <\/div>\n

<\/span><\/div>\n

  >><\/span><\/b> Click on <\/span>Floor Mesh and Analysis<\/span><\/b><\/span>
<\/span><\/div>\n
The FE analytical model with resultant slab mesh and the applied superstructure loads will be shown.  <\/span><\/div>\n
<\/div>\n
<\/div>\n
\n
\"Notes\" <\/p>\n
The core wall forces from the superstructure are automatically evaluated and transfer as nodal axial and moments forces shown as red arrows.<\/span>  <\/div>\n

<\/span><\/div>\n

  >><\/span><\/b> <\/span> Click <\/span><\/span> <\/span>OK<\/span><\/b> <\/span> to accept the analysis and close the mesh window. <\/span><\/span><\/div>\n<\/div>\n
  >><\/span><\/b><\/span> <\/span> <\/span><\/span><\/span> <\/span>Ensure the <\/span>Allowable Stress of Soil<\/span><\/b> to <\/span>150 <\/span><\/b>kN\/m<\/span>2<\/span><\/sup>.<\/span><\/span><\/div>\n<\/div>\n
<\/p>\n
  >><\/span><\/b> <\/span>Click <\/span>Display Analytical Model<\/span><\/b><\/span> <\/div>\n

<\/span><\/span><\/div>\n

<\/div>\n
<\/div>\n

FE Analytical Model to show results<\/span><\/h2>\n
The FE Floor Analysis dialog will close & the<\/span><\/span> <\/span> FE Foundation Model View <\/span><\/b> <\/span>will be created.<\/span><\/span><\/div>\n
  >><\/span><\/b> Click on the <\/span>FE Foundation Model View <\/span><\/b>& the associated Analytical Model ribbons will appear. <\/span> <\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n
\"Notes\" <\/p>\n
Alternatively, the <\/span> FE Foundation Model<\/span><\/b> view can be created by going to <\/span>Analysis<\/span><\/b> tab > <\/span> Analytical Model <\/span><\/b>dropdown > Select "<\/span>FE Foundation Model<\/span><\/b>"<\/span> <\/div>\n
\"\"<\/div>\n

<\/span><\/div>\n

  >><\/b> To have a less cluttered view with nodal loads hidden, Go to<\/span> Member<\/span><\/b> tab > Deactivate nodal <\/span>Loads<\/span><\/b> <\/div>\n
  >><\/span><\/b> <\/span> Go to<\/span><\/span> <\/span>Contours <\/span><\/b> <\/span>tab > Select <\/span><\/span> <\/span>Threshold Contours <\/span><\/b><\/div>\n
<\/div>\n
\n
  >><\/span><\/b> On the <\/span><\/span> <\/span>Effects <\/span><\/b> <\/span>list on the right of the screen, scroll down to locate & select <\/span><\/span> <\/span>Soil Pressure  <\/span><\/b>(as shown above)
<\/span><\/div>\n
  >> <\/span><\/b>On the <\/span> Load Combinations<\/span><\/b> list on the right most of screen, select load combination <\/span>G+Q  <\/span><\/b>(as shown above)
<\/span><\/div>\n
\n

The threshold contours shows areas where resultant soil pressure is pass in<\/span> Green<\/span><\/b> & fail \/ overstressed in<\/span> Red<\/b><\/span>.  <\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n
\"Notes\"<\/p>\n
Since factored load combination are plotted, the allowable soil pressure will multiplied by ultimate factor of <\/span><\/span> <\/span>1.25<\/span><\/b> <\/span> default in Foundation Design Settings, i.e. 150 (allowable stress) x 1.25 = <\/span>187.5<\/span><\/b> kN\/m2.  The actual soil pressure will be compared with this factored allowable soil pressure in the Threshold contour. <\/span><\/span><\/span><\/div>\n
We check soil pressure first to ensure that soil is not overstressed before we even look at the steel requirements.
<\/span><\/div>\n
Place the mouse cursor on any mesh & the soil pressure will be shown at each mesh end.<\/span><\/span> <\/div>\n

<\/span><\/div>\n

\n

It is necessary to make the raft larger to decrease the resultant soil pressure to pass as shown in below steps : 
<\/span><\/p>\n

  <\/span><\/span>>><\/span><\/b> Go to ST 0 plan view by clicking on <\/span><\/span>Storey: 0 (Plan) view<\/span><\/b> tab<\/span><\/span><\/div>\n
<\/p>\n
  <\/span> >><\/span><\/b> Increase the raft size by increasing the cantilever length to <\/span>1100<\/span><\/b> mm (select each individual slab > bring up the Properties > <\/span>Cantilever<\/span><\/b> tab > change <\/span>L-Cant <\/span><\/b>> click <\/span>Update<\/span><\/b> > <\/span>Close<\/span><\/b>)
<\/span><\/div>\n
  <\/span>>><\/span><\/b> Then re-run the <\/span>FE Raft Foundation<\/span><\/b> Analysis. <\/span>Similarly go the <\/span>FE Foundation Model<\/span><\/b> > <\/span>Contours<\/span><\/b> tab > check the <\/span>Soil Pressure Threshold<\/span><\/b>. The soil pressure should now pass (all green)
<\/span><\/div>\n

<\/span><\/p>\n

  <\/span>>> <\/span><\/b> <\/span>The raft can now be designed in the same way as Finite Element meshed slabs by viewing the As (d) contours. <\/span><\/span><\/div>\n
Example, click <\/span>Contours<\/span><\/b> & select <\/span>As(d)1-bot<\/span><\/b> (as shown below)<\/span><\/span><\/div>\n
<\/div>\n
<\/div>\n
<\/div>\n

<\/span><\/span><\/div>\n<\/div>\n<\/div>\n

\n
\"Notes\"<\/p>\n
The design of raft foundation is similar to a flat slab. The design procedure can be summarized as follows : <\/span><\/span><\/div>\n
    \n
  1. Display & examine the various steel area required contours & specifying user-defined and \/ or threshold steel area contours.  
    <\/span><\/li>\n
  2. Create FE slab strips (fixed band strip) to automate the selection of reinforcements, if preferable.
    <\/span><\/li>\n
  3. Column punching shear check should be performed for all columns & discrete walls (not merged core walls). Go <\/span>Design <\/span><\/b>tab <\/span>><\/span><\/b> Column Punching Check > Refer to <\/b><\/span>Punching Shear Check for Raft Foundation<\/a><\/font><\/li>\n<\/ol>\n
    Refer to this article and the attached flat slab manual for further details : <\/span> Working with Flat Slabs<\/a> <\/div>\n

    <\/span><\/div>\n

    \n
    \"Info\"<\/p>\n
    The wireframe of members (e.g., column) is based on the centroid of the section <\/span><\/div>\n

    <\/span><\/div>\n<\/div>\n

    Raft Foundation Reports
    <\/span><\/h2>\n
    The relevant reports can be obtained by going to <\/span>Drawings & Reports <\/span><\/b>ribbon <\/span>> Reports<\/span><\/b> dropdown menu<\/span> <\/span><\/b>:  
    <\/span><\/div>\n
      \n
    1. Pre-Analysis Checks Report – Soil Properties<\/span><\/b> :  contains the foundation data such as soil bearing capacity, coefficient of subgrade reactions, total loadings, average & maximum soil pressures.
      <\/span><\/li>\n
    2. FE Foundation Report <\/span><\/b>: contains FE Analysis Results, FE nodes & shells data, Slab Strip Reinforcement  design calculation, various contours diagrams & punching shear checks.
      <\/span><\/li>\n
    3. Base Reactions Report <\/span><\/b>: prints out the foundation analysis forces of columns and walls transferred to the raft foundations. These forces are obtained from the base reactions of the Building Analysis analytical model. <\/span><\/li>\n<\/ol>\n<\/div>\n
      \n
      \n

      Piled Raft Foundation Example
      <\/span><\/h1>\n
      We will change the raft foundation to a piled raft foundation. <\/span><\/span><\/div>\n
      \n
      \"Notes\"<\/p>\n
      For piled raft foundation, a single slab must be modelled, i.e. you cannot break the slab into different pieces.<\/span> <\/div>\n

      <\/span><\/div>\n<\/div>\n

      Creating a pile raft slab using Rectangle Polyline <\/span>
      <\/h2>\n
      <\/div>\n
      <\/div>\n
      \n
        >><\/span><\/b> <\/span>Go to <\/span>Storey : 0 (Plan) view<\/span><\/b> <\/span>– as all foundation elements can only be modelled in Storey 0 (foundation level).<\/span><\/div>\n
        >> <\/b>Create a rectangle polyline (as shown above). This will be the outline of the piled raft slab. <\/span><\/div>\n
      \n
      \"Notes\"You can also use the Polyline <\/b>function to make irregular shape of piled raft slab. Refer :  Working with Slab\/Column Edge<\/a><\/span><\/span><\/div>\n
        >><\/span><\/b> Create a<\/span> 400mm<\/span><\/b> deep slab <\/span>cover inside the lift core (<\/span>Type 1, Cover = 100mm<\/span><\/b> & Dead\/Imposed Load =<\/span> 0<\/span><\/b>) <\/span><\/span><\/div>\n<\/div>\n
      <\/span><\/div>\n<\/div>\n

      Creating Piles
      <\/span><\/h2>\n<\/div>\n

       <\/span> >><\/span><\/b> <\/span>Delete<\/span><\/span><\/b> any existing strip footing and pad footing  (as we will be ignoring the soil bearing capacity of the soil)
      <\/span><\/span><\/p>\n

        <\/span>>> S<\/span><\/b><\/span><\/span>elect the raft slab<\/span><\/b> then right-click, select <\/span>Insert Pile<\/span><\/b><\/span>
      <\/span><\/p>\n

        <\/span>>><\/span><\/b> You would be asked to pick the pile Reference Point.<\/span> <\/span><\/span>Left-click on the lower-left corner at<\/span> <\/span><\/span>intersection of <\/span>GL B\/2.<\/span><\/b><\/span><\/p>\n

      <\/div>\n
      <\/div>\n
      \n

      After selecting the reference point, the <\/span>Pile Properties<\/span><\/b><\/i> <\/span><\/b>is dialog is used to position the piles. A preview of the layout is displayed to assist in this process.<\/span><\/span><\/p>\n

      <\/div>\n
      <\/div>\n
      \n
      <\/div>\n
      <\/div>\n<\/div>\n
        >><\/span><\/b> Enter <\/span>Eccentricities<\/span><\/b>, <\/span>Ex <\/span><\/b>& <\/span>Ey<\/span><\/b> = <\/span>0 <\/span><\/b>mm.<\/span> <\/span><\/span>This means that the first pile would be exactly at the position of the ref point picked.<\/span><\/span>
      <\/span><\/div>\n
        >><\/span><\/b> Enter Pile <\/span>Spacings, Sx <\/span><\/b>&<\/span> Sy<\/span><\/b> = <\/span>1250 <\/span><\/b>mm.<\/span> <\/span><\/span>This would result in a regular pile layout with spacing of 1250 mm in the horizontal and vertical plan view.<\/span><\/span>
      <\/span><\/div>\n
        <\/span> >><\/span><\/b> Enter <\/span>Compression Safe Working Load<\/span><\/b> = <\/span>300 kN<\/span><\/b> <\/div>\n
      <\/div>\n<\/div>\n
      \"Notes\"<\/p>\n
      If you want to specify a different pile location, you will have to edit the pile position (Ex, Ey) after creating it by choosing each pile in turn > <\/span>Right-Click <\/span><\/b> <\/span> <\/span><\/span>> <\/span>Properties.<\/span><\/b><\/span><\/div>\n
      Pile safe working load for vertical combinations will be factored as stated at the bottom of the dialog box.<\/span><\/div>\n

      <\/span><\/div>\n

      FE Piled Raft Analysis & Pile Report<\/span><\/span>
      <\/span><\/h2>\n
       >> <\/span><\/b>Run <\/span>FE Raft Foundation Analysis<\/span><\/b><\/span><\/div>\n
      <\/div>\n
      <\/span><\/b><\/span> <\/div>\n<\/div>\n
        >><\/span><\/b> <\/span><\/b><\/i>Check \u2018<\/span>Ignore the Bearing Capacity of Soil<\/span><\/b>\u2019 (as shown above)<\/span><\/div>\n
      \n
      \n
      \"Info\"This means that the raft is supported completely by the piles with no contribution from the soil. <\/span> <\/span><\/span>It will then function like a pile cap.<\/span><\/p>\n

      If this option is unchecked, then raft will also sit on the soil. We can then expect the resultant piles forces to be decreased as load is shared with the \u201cnon-suspended\u201d raft.<\/span><\/span><\/p>\n

      Alternatively, you can enter a very small number for Soil Subgrade Coefficient<\/b>, i.e soil stiffness (example 0.01)<\/span>
      <\/span><\/div>\n

      <\/span><\/div>\n<\/div>\n

        >> <\/span><\/b>Click on <\/span>Floor Mesh and Analysi<\/span><\/b>s <\/b> <\/span>> OK <\/span><\/b>to close meshing dialog after successful mesh
      <\/span><\/div>\n<\/div>\n
        >><\/span><\/b> Click <\/span>Pile Results Report <\/span><\/b>in Post-Analysis Processes and Report tab<\/span><\/div>\n
      <\/div>\n
      <\/div>\n
      <\/div>\n
        >>  <\/span><\/b>Choose the default options in <\/span>Pile Report Options > OK > <\/span><\/b>Report will be generated (example as below)<\/span><\/div>\n
      <\/div>\n
      <\/div>\n
      <\/div>\n
      \n
      \"Info\" <\/p>\n
      The pile capacity is <\/span>Safe Working Compression Load<\/span><\/b> multiplied by the <\/span>Ultimate Strength Factor<\/span><\/b> in Foundation Settings, i.e. <\/span>300 kN x 1.25 = 375 kN<\/span><\/b><\/div>\n
      If there are failed piles, the solution maybe to either increase the pile compression capacity or increase the number of piles (or both)<\/span> <\/div>\n

      <\/span><\/div>\n

       >><\/span><\/b> <\/span> Close the Report Preview<\/span><\/span><\/div>\n<\/div>\n
       >><\/span><\/b> Click <\/span>Display Analytical Model<\/span><\/b> in the Post-Analysis Processors and Report tab > a new FE Foundation Model view will be created
      <\/span><\/div>\n
       >> <\/span><\/b>Click on the  <\/span>FE Foundation Model<\/span><\/b> view & the associated Analytical Model ribbons will appear.  <\/span><\/span>
      <\/span><\/div>\n
       >><\/span><\/b> Got to Contours tab > <\/span>Deactivate all Contours<\/span><\/b> to get a clearer view (as shown below)<\/span><\/span><\/div>\n
      <\/div>\n
      <\/div>\n
      <\/div>\n
       <\/span>>><\/span><\/b> Go to <\/span>Members<\/span><\/b> tab > Deactivate "<\/span>Loads<\/span><\/b>" > This will turn off all the superstructure nodal loads for better view  (as shown below)<\/span><\/span>
      <\/span><\/div>\n
       >><\/span><\/b>  Activate " <\/span>Pile Forces<\/span><\/b>" > This will turn on the display of Pile Forces<\/span><\/div>\n
      <\/div>\n
      <\/div>\n
       >> <\/span><\/b> Select 1st load combination  <\/span>G+Q<\/span><\/b>, so the pile forces will now be shown for this selected load combination 
      <\/span><\/div>\n
       <\/span>>> <\/span><\/b> Select <\/span>Envelop (min) and<\/span><\/b> <\/span>Envelop (max)<\/span><\/b> – which will show the minimum and maximum values of all load combinations (as shown below)<\/span><\/div>\n
      <\/div>\n
      <\/div>\n
      <\/div>\n
      \"Notes\"<\/p>\n
      Pile negative value means compression and positive value is tension. These values will be checked with respective compression or tension limit.<\/span><\/span><\/div>\n
      The piles will colored coded to reflect Pass in<\/span> <\/span>Green<\/span><\/b> or Fail in<\/span> Red<\/span><\/b>.  These are same values and limits shown in the Pile Results Report. <\/span> <\/div>\n

      <\/span><\/div>\n

        <\/span><\/span> <\/span>>><\/span><\/b> <\/span> The raft (now totally suspended) can now be designed in the same way as Finite Element meshed slabs by viewing the <\/span>As (d) contours<\/span><\/b> in the <\/span>Contours<\/span><\/b> tab. <\/span><\/span><\/div>\n
      \n
      \"Notes\" <\/p>\n
      The design of piled raft foundation slabs is similar to a flat slab. Refer to this article and the attached flat slab manual for further details :<\/span>  Working with Flat Slabs<\/a><\/div>\n
      Punching shear checks cannot be performed for piled raft foundation, as shear perimeter is complex & influenced by irregular piles location. <\/span><\/div>\n

      <\/span><\/div>\n

        <\/span><\/span>>> <\/span><\/b>Click on <\/span>Storey : 0 (Plan) view<\/span><\/b>
      <\/span><\/div>\n
        >> <\/span><\/b>Go to <\/span>Review <\/span><\/b>Tab > Click <\/span>Visual Interrogation <\/span><\/b> <\/div>\n
      <\/div>\n
      <\/div>\n<\/div>\n
      \n
      <\/div>\n
        >> <\/span><\/b>Select <\/span>Pile Capacity Status <\/span><\/b>for <\/span>Criteria for Coloring <\/span><\/b>> <\/span>OK <\/span><\/b> <\/div>\n
      \n
      \"Notes\"<\/p>\n
      Pile capacity status will be shown as above, i.e.<\/span> <\/span>Green <\/span><\/b>= <\/span>PASS<\/span>,<\/b>  <\/span>Amber <\/span><\/b>= <\/span>> 90% Capacity<\/span><\/b> and<\/span> <\/span> Red <\/span><\/b>= <\/span>Fail<\/span> <\/b><\/span><\/div>\n

      <\/span><\/div>\n

      Changing Pile Properties<\/span><\/span>
      <\/span><\/h2>\n
      The properties and location of the piles can be changed : 
      <\/span><\/div>\n<\/div>\n<\/div>\n
        <\/span>>><\/span><\/b> Ensure to go to <\/span> Storey : 0 (Plan)<\/span><\/b> view
      <\/span><\/div>\n
       >><\/span><\/b> Select a single pile or Hold down <\/span> CTRL<\/span><\/b> key to multiple select piles <\/span> <\/div>\n
      \n
      \"Info\"<\/p>\n
      Alternatively, you can go to <\/span>Select Filter<\/span> <\/span>\"\" <\/span><\/b>options in <\/span>Modelling <\/span><\/b>tab, and turn on only Piles, after which it’s easy to click and drag a window to select piles only.<\/span><\/span><\/div>\n

      <\/span><\/div>\n

        >><\/span><\/b> <\/span>Right-click > Choose Properties<\/span><\/b><\/div>\n<\/div>\n
      This will bring out the Pile Properties dialog again.<\/span><\/div>\n
      <\/div>\n
      <\/div>\n
      <\/div>\n
      You can now change the properties of the piles such as size, location (Eccentricities) & Safe working load. <\/span><\/div>\n
      \n
      \n
      \"Alert\" <\/p>\n
      After changing the pile properties, ensure re-perform FE Foundation Analysis. It is not necessary to re-perform Building Analysis if there is no changes in superstructure (e.g. members sizes or loads)<\/span> <\/div>\n

      <\/span><\/div>\n

      Release Column Top Node in X and Y direction for FE foundation Model<\/span>
      <\/h2>\n
      <\/div>\n
      <\/div>\n
      Option is checked<\/span><\/b> :<\/span><\/div>\n<\/div>\n
        \n
      1. Top Nodes of the columns are free to move & rotate. <\/span>The effect of moment from the column stump is considered & the raft foundation will rotate.<\/span><\/li>\n
      2. R<\/span>esults are closer to a completely rigid pile cap assumption. <\/span><\/li>\n
      3. Due to effect of moments, the pile axial forces will considerably different from one another. <\/span><\/li>\n
      4. Generally, this may more conservative approach to get maximum pile forces, as moments will cause pile(s) further away from the column stump to have higher axial loads. <\/span><\/li>\n<\/ol>\n
        Option is unchecked<\/span><\/b> : <\/span><\/div>\n
          \n
        1. Top nodes of columns are restrained to X and Y translations. <\/span>
          <\/span><\/li>\n
        2. Minimum raft or pilecap rotation is obtained as the moment from the column stump essentially ignored. <\/span>
          <\/span><\/li>\n
        3. Pile axial forces are closer to one another, i.e. more evenly distributed. <\/span><\/li>\n<\/ol>\n
          <\/div>\n<\/div>\n
          <\/div>\n
          <\/div>\n

          Raft Foundation Webinar Recording<\/span><\/span><\/h1>\n
          \n
          \n
          The following webinar covers the basic procedures in modelling, analysis & design of a sample raft \/ mat foundation using ProtaStructure : <\/span><\/div>\n
          <\/div>\n
          <\/div>\n<\/div>\n
          <\/div>\n<\/div>\n
          <\/div>\n","protected":false},"excerpt":{"rendered":"

          Raft Foundation Example This example is based on the "Quick Start Guide Concrete Complete" model which is automatically installed in the default ProtaDataXXXX folder. 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