diff --git a/VECTO/GUI/F_VEH.Designer.vb b/VECTO/GUI/F_VEH.Designer.vb
index b3a55da946c0d94d845be43f64e87eff7c3c82fa..917af2444bc615cc70f4e8469c11d26e25876eb3 100644
--- a/VECTO/GUI/F_VEH.Designer.vb
+++ b/VECTO/GUI/F_VEH.Designer.vb
@@ -77,6 +77,7 @@ Partial Class F_VEH
         Me.ColumnHeader7 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)
         Me.ColumnHeader8 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)
         Me.ColumnHeader9 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)
+        Me.ColumnHeader1 = CType(New System.Windows.Forms.ColumnHeader(), System.Windows.Forms.ColumnHeader)
         Me.ButAxlAdd = New System.Windows.Forms.Button()
         Me.Label23 = New System.Windows.Forms.Label()
         Me.CbAxleConfig = New System.Windows.Forms.ComboBox()
@@ -570,7 +571,7 @@ Partial Class F_VEH
         Me.LvRRC.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
             Or System.Windows.Forms.AnchorStyles.Left) _
             Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
-        Me.LvRRC.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.ColumnHeader7, Me.ColumnHeader8, Me.ColumnHeader9})
+        Me.LvRRC.Columns.AddRange(New System.Windows.Forms.ColumnHeader() {Me.ColumnHeader7, Me.ColumnHeader8, Me.ColumnHeader9, Me.ColumnHeader1})
         Me.LvRRC.FullRowSelect = True
         Me.LvRRC.GridLines = True
         Me.LvRRC.HideSelection = False
@@ -585,18 +586,23 @@ Partial Class F_VEH
         '
         'ColumnHeader7
         '
-        Me.ColumnHeader7.Text = "Axle"
-        Me.ColumnHeader7.Width = 36
+        Me.ColumnHeader7.Text = "#"
+        Me.ColumnHeader7.Width = 22
         '
         'ColumnHeader8
         '
-        Me.ColumnHeader8.Text = "Max. axle weight [kg]"
-        Me.ColumnHeader8.Width = 120
+        Me.ColumnHeader8.Text = "Weight share [-]"
+        Me.ColumnHeader8.Width = 94
         '
         'ColumnHeader9
         '
         Me.ColumnHeader9.Text = "RRC [-]"
-        Me.ColumnHeader9.Width = 79
+        Me.ColumnHeader9.Width = 55
+        '
+        'ColumnHeader1
+        '
+        Me.ColumnHeader1.Text = "Fz ISO [N]"
+        Me.ColumnHeader1.Width = 65
         '
         'ButAxlAdd
         '
@@ -932,4 +938,5 @@ Partial Class F_VEH
     Friend WithEvents OpenWithToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
     Friend WithEvents ShowInFolderToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
     Friend WithEvents BtCdFileOpen As System.Windows.Forms.Button
+    Friend WithEvents ColumnHeader1 As System.Windows.Forms.ColumnHeader
 End Class
diff --git a/VECTO/GUI/F_VEH.vb b/VECTO/GUI/F_VEH.vb
index 641fa8672cb64349f30fd80aeb8a5c1c634c57f6..6e053361c98805eb4b3dc34be3517908a9fd0ef4 100644
--- a/VECTO/GUI/F_VEH.vb
+++ b/VECTO/GUI/F_VEH.vb
@@ -212,6 +212,7 @@ Public Class F_VEH
             lvi.SubItems(0).Text = i.ToString
             lvi.SubItems.Add(sl(0))
             lvi.SubItems.Add(sl(1))
+            lvi.SubItems.Add(sl(2))
             LvRRC.Items.Add(lvi)
         Next
 
@@ -283,9 +284,9 @@ Public Class F_VEH
         VEH0.RtFile.Init(fPATH(file), Me.TbRtPath.Text)
 
         VEH0.VehCat = CType(Me.CbCat.SelectedIndex, tVehCat)
-        VEH0.RRCs.Clear()
+
         For Each LV0 In LvRRC.Items
-            VEH0.RRCs.Add(New Single() {CSng(LV0.SubItems(1).Text), CSng(LV0.SubItems(2).Text)})
+            VEH0.RRCs.Add(New Single() {CSng(LV0.SubItems(1).Text), CSng(LV0.SubItems(2).Text), CSng(LV0.SubItems(3).Text)})
         Next
 
         VEH0.MassMax = CSng(fTextboxToNumString(Me.TbMassMax.Text))
@@ -592,6 +593,7 @@ Public Class F_VEH
             lv0.SubItems(0).Text = Me.LvRRC.Items.Count + 1
             lv0.SubItems.Add(Trim(dlog.TbWeight.Text))
             lv0.SubItems.Add(Trim(dlog.TbRRC.Text))
+            lv0.SubItems.Add(Trim(dlog.TbFzISO.Text))
 
             Me.LvRRC.Items.Add(lv0)
 
@@ -661,10 +663,12 @@ Public Class F_VEH
 
         dlog.TbWeight.Text = LV0.SubItems(1).Text
         dlog.TbRRC.Text = LV0.SubItems(2).Text
+        dlog.TbFzISO.Text = LV0.SubItems(3).Text
 
         If dlog.ShowDialog = Windows.Forms.DialogResult.OK Then
             LV0.SubItems(1).Text = dlog.TbWeight.Text
             LV0.SubItems(2).Text = dlog.TbRRC.Text
+            LV0.SubItems(3).Text = dlog.TbFzISO.Text
 
             Change()
 
diff --git a/VECTO/GUI/F_VEH_Axle.Designer.vb b/VECTO/GUI/F_VEH_Axle.Designer.vb
index a3e6b2bc379b03c682cb072a31711de4ea54ce7d..a934cfa17a2c8239bf5bc4fc2e18e118c3c18c8d 100644
--- a/VECTO/GUI/F_VEH_Axle.Designer.vb
+++ b/VECTO/GUI/F_VEH_Axle.Designer.vb
@@ -31,6 +31,9 @@ Partial Class F_VEH_Axle
         Me.Label3 = New System.Windows.Forms.Label()
         Me.Label4 = New System.Windows.Forms.Label()
         Me.TbRRC = New System.Windows.Forms.TextBox()
+        Me.Label5 = New System.Windows.Forms.Label()
+        Me.Label6 = New System.Windows.Forms.Label()
+        Me.TbFzISO = New System.Windows.Forms.TextBox()
         Me.TableLayoutPanel1.SuspendLayout()
         Me.SuspendLayout()
         '
@@ -42,7 +45,7 @@ Partial Class F_VEH_Axle
         Me.TableLayoutPanel1.ColumnStyles.Add(New System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 50.0!))
         Me.TableLayoutPanel1.Controls.Add(Me.OK_Button, 0, 0)
         Me.TableLayoutPanel1.Controls.Add(Me.Cancel_Button, 1, 0)
-        Me.TableLayoutPanel1.Location = New System.Drawing.Point(83, 74)
+        Me.TableLayoutPanel1.Location = New System.Drawing.Point(83, 98)
         Me.TableLayoutPanel1.Name = "TableLayoutPanel1"
         Me.TableLayoutPanel1.RowCount = 1
         Me.TableLayoutPanel1.RowStyles.Add(New System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 50.0!))
@@ -71,11 +74,11 @@ Partial Class F_VEH_Axle
         'Label1
         '
         Me.Label1.AutoSize = True
-        Me.Label1.Location = New System.Drawing.Point(17, 15)
+        Me.Label1.Location = New System.Drawing.Point(33, 15)
         Me.Label1.Name = "Label1"
-        Me.Label1.Size = New System.Drawing.Size(86, 13)
+        Me.Label1.Size = New System.Drawing.Size(72, 13)
         Me.Label1.TabIndex = 1
-        Me.Label1.Text = "Max. axle weight"
+        Me.Label1.Text = "Weight Share"
         '
         'TbWeight
         '
@@ -89,9 +92,9 @@ Partial Class F_VEH_Axle
         Me.Label2.AutoSize = True
         Me.Label2.Location = New System.Drawing.Point(199, 15)
         Me.Label2.Name = "Label2"
-        Me.Label2.Size = New System.Drawing.Size(25, 13)
+        Me.Label2.Size = New System.Drawing.Size(16, 13)
         Me.Label2.TabIndex = 1
-        Me.Label2.Text = "[kg]"
+        Me.Label2.Text = "[-]"
         '
         'Label3
         '
@@ -118,15 +121,43 @@ Partial Class F_VEH_Axle
         Me.TbRRC.Size = New System.Drawing.Size(84, 20)
         Me.TbRRC.TabIndex = 5
         '
+        'Label5
+        '
+        Me.Label5.AutoSize = True
+        Me.Label5.Location = New System.Drawing.Point(27, 67)
+        Me.Label5.Name = "Label5"
+        Me.Label5.Size = New System.Drawing.Size(78, 13)
+        Me.Label5.TabIndex = 1
+        Me.Label5.Text = "Fz (ISO 28580)"
+        '
+        'Label6
+        '
+        Me.Label6.AutoSize = True
+        Me.Label6.Location = New System.Drawing.Point(199, 67)
+        Me.Label6.Name = "Label6"
+        Me.Label6.Size = New System.Drawing.Size(21, 13)
+        Me.Label6.TabIndex = 1
+        Me.Label6.Text = "[N]"
+        '
+        'TbFzISO
+        '
+        Me.TbFzISO.Location = New System.Drawing.Point(109, 64)
+        Me.TbFzISO.Name = "TbFzISO"
+        Me.TbFzISO.Size = New System.Drawing.Size(84, 20)
+        Me.TbFzISO.TabIndex = 5
+        '
         'F_VEH_Axle
         '
         Me.AcceptButton = Me.OK_Button
         Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
         Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
         Me.CancelButton = Me.Cancel_Button
-        Me.ClientSize = New System.Drawing.Size(241, 115)
+        Me.ClientSize = New System.Drawing.Size(241, 139)
+        Me.Controls.Add(Me.TbFzISO)
+        Me.Controls.Add(Me.Label6)
         Me.Controls.Add(Me.TbRRC)
         Me.Controls.Add(Me.Label4)
+        Me.Controls.Add(Me.Label5)
         Me.Controls.Add(Me.TbWeight)
         Me.Controls.Add(Me.Label3)
         Me.Controls.Add(Me.Label2)
@@ -153,5 +184,8 @@ Partial Class F_VEH_Axle
     Friend WithEvents Label3 As System.Windows.Forms.Label
     Friend WithEvents Label4 As System.Windows.Forms.Label
     Friend WithEvents TbRRC As System.Windows.Forms.TextBox
+    Friend WithEvents Label5 As System.Windows.Forms.Label
+    Friend WithEvents Label6 As System.Windows.Forms.Label
+    Friend WithEvents TbFzISO As System.Windows.Forms.TextBox
 
 End Class
diff --git a/VECTO/GUI/F_VEH_Axle.resx b/VECTO/GUI/F_VEH_Axle.resx
index 5ea0895e324fa7a86681adc56938bad2f2367ba0..29dcb1b3a353ba227f65e11fbe3d6f0766e84292 100644
--- a/VECTO/GUI/F_VEH_Axle.resx
+++ b/VECTO/GUI/F_VEH_Axle.resx
@@ -112,9 +112,9 @@
     <value>2.0</value>
   </resheader>
   <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
 </root>
\ No newline at end of file
diff --git a/VECTO/GUI/F_VEH_Axle.vb b/VECTO/GUI/F_VEH_Axle.vb
index 467c8ee2d942274d7d11a5c1bcd48018a60ee440..279b9cf4230c496d48bc96518d6248bede5a10c7 100644
--- a/VECTO/GUI/F_VEH_Axle.vb
+++ b/VECTO/GUI/F_VEH_Axle.vb
@@ -14,6 +14,11 @@ Public Class F_VEH_Axle
             Exit Sub
         End If
 
+        If Not IsNumeric(Me.TbFzISO.Text) OrElse Trim(Me.TbFzISO.Text) = "" Then
+            MsgBox("Fz ISO input is not valid!")
+            Exit Sub
+        End If
+
         Me.DialogResult = System.Windows.Forms.DialogResult.OK
         Me.Close()
     End Sub
diff --git a/VECTO/Input Files/cVEH.vb b/VECTO/Input Files/cVEH.vb
index 78c3f3a478db4a4ab1c72e76b9807c0cc3a3ce7c..a162d07708ab8e5593f98a10af50fc60a2a1a264 100644
--- a/VECTO/Input Files/cVEH.vb	
+++ b/VECTO/Input Files/cVEH.vb	
@@ -306,7 +306,11 @@ Public Class cVEH
             If line(0) = sKey.Break Then Exit Do
 
             Try
-                RRCs.Add(New Single() {CSng(line(0)), CSng(line(1))})
+                If UBound(line) > 1 Then
+                    RRCs.Add(New Single() {CSng(line(0)), CSng(line(1)), CSng(line(2))})
+                Else
+                    RRCs.Add(New Single() {0.0, CSng(line(1)), 0.0})
+                End If
             Catch ex As Exception
                 WorkerMsg(tMsgID.Err, ex.Message, MsgSrc)
                 file.Close()
@@ -433,9 +437,9 @@ lbError:
 
         'Axle configuration - Update 16.10.2012
         file.WriteLine("c Axle configurations")
-        file.WriteLine("c Max. axle weight [kg], RRC [N/N]")
+        file.WriteLine("c Axle weight share [-], RRC [N/N],Fz ISO [N]")
         For Each sl In RRCs
-            file.WriteLine(CStr(sl(0)), CStr(sl(1)))
+            file.WriteLine(CStr(sl(0)), CStr(sl(1)), CStr(sl(2)))
         Next
 
         file.WriteLine(sKey.Break)
@@ -489,11 +493,20 @@ lbError:
             Return False
         End If
 
+        'Check if sum=100%
         sumW = 0
-        sumprod = 0
         For Each sl In RRCs
             sumW += sl(0)
-            sumprod += sl(0) * sl(1)
+        Next
+
+        If Math.Abs(sumW - 1) > 0.0001 Then
+            WorkerMsg(tMsgID.Err, "Sum of axle weight shares is not 100%!", MsgSrc, "<GUI>" & sFilePath)
+            Return False
+        End If
+
+        sumprod = 0
+        For Each sl In RRCs
+            sumprod += sl(0) * (sl(1) * 100 * ((siLoading + siMass + MassExtra) * 9.81 * sl(0) / sl(2)) ^ (0.9 - 1))     'Beta=0.9
         Next
 
         siFr0 = sumprod / sumW
@@ -607,9 +620,6 @@ lbError:
                 MyGBmaps.Add(GBmap0)
 
                 'Calculate average efficiency for fast approx. calculation
-          
-
-
                 If i > 0 Then
 
                     EffSum = 0