diff --git a/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs b/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs
index 366f0f3e..9fcb3a30 100644
--- a/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs
+++ b/PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs
@@ -4016,7 +4016,8 @@ namespace VEPROMS.CSLA.Library
 				else if (myparent.IsSection || myparent.IsHigh || myparent.IsSequential || (myparent.IsRNOPart && myparent.FormatStepData.NumberHighLevel && tbformat.ToUpper().Contains("WPAR")))
 				{
 					parentTab = myparent.MyTab.CleanText.Trim();
-					if (((MyDocStyle.StructureStyle.Style & E_DocStructStyle.DSS_AddDotZeroStdHLS) == E_DocStructStyle.DSS_AddDotZeroStdHLS) && myparent.MyContent.Type == 20002)
+					if ((((MyDocStyle.StructureStyle.Style & E_DocStructStyle.DSS_AddDotZeroStdHLS) == E_DocStructStyle.DSS_AddDotZeroStdHLS) && myparent.MyContent.Type == 20002) ||
+						myparent.FormatStepData.AppendDotZero) // F2018-022 Added step type flag to append a ".0" to the end of the high level step - put in for Westinghouse single column format (wst1)
 						parentTab = parentTab.Replace(".0", "");		// this was added in, remove for substeps.
 					tbformat = parentTab + (parentTab.EndsWith(".") ? "" : parentTab == "" ? "" : ".") + tbformat.TrimStart();
 				}
@@ -4046,7 +4047,8 @@ namespace VEPROMS.CSLA.Library
 			{
 				//16 bit code limits the #2# offset logic to the docstyle cannot have the DSS_ADDDOTZEROSTDHLS &
 				// its HLS is type std high:
-				if (!(((MyDocStyle.StructureStyle.Style & E_DocStructStyle.DSS_AddDotZeroStdHLS) == E_DocStructStyle.DSS_AddDotZeroStdHLS) && this.MyHLS.MyContent.Type == 20002))
+				if (!((((MyDocStyle.StructureStyle.Style & E_DocStructStyle.DSS_AddDotZeroStdHLS) == E_DocStructStyle.DSS_AddDotZeroStdHLS) && this.MyHLS.MyContent.Type == 20002) ||
+					this.FormatStepData.AppendDotZero)) // F2018-022 Added step type flag to append a ".0" to the end of the high level step - put in for Westinghouse single column format (wst1)
 				{
 					int indxlb = tbformat.IndexOf("#");
 					string ofst = tbformat.Substring(indxlb + 1, 3);
@@ -4121,6 +4123,11 @@ namespace VEPROMS.CSLA.Library
 				tbformat = tbformat.Replace("{numeric}", ordinal.ToString().PadLeft(2) + ".0");
 				tbformat = tbformat.Substring(0, tbformat.Length - 2);
 			}
+			if (tbformat.Contains("{numeric}") && (this.FormatStepData.AppendDotZero)) // F2018-022 Added step type flag to append a ".0" to the end of the high level step - put in for Westinghouse single column format (wst1)
+			{
+				string numtxt = ordinal.ToString().PadLeft(2) + ".0";
+				tbformat = tbformat.Replace("{numeric}.", numtxt).Replace("{numeric}", numtxt);
+			}
 			// if this is a wolf creek background, if the tbformat ends with a '.' don't add a space,
 			// otherwise add a space.
 			if (ActiveFormat.PlantFormat.FormatData.SectData.StepSectionData.WolfCreekBackgroundFormat && IsBackgroundStep())
diff --git a/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs b/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs
index 05035602..202815d2 100644
--- a/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs
+++ b/PROMS/VEPROMS.CSLA.Library/Extension/TransitionExt.cs
@@ -1001,6 +1001,7 @@ namespace VEPROMS.CSLA.Library
 			// if this section has the DSS_AddDotZeroStdHLS, then we need to account for this when
 			// concatenating text onto the tabs.
 			bool hasDotZero = !item.IsProcedure && (item.MyDocStyle.StructureStyle.Style & E_DocStructStyle.DSS_AddDotZeroStdHLS) == E_DocStructStyle.DSS_AddDotZeroStdHLS;
+			hasDotZero |= item.MyHLS.FormatStepData.AppendDotZero; // F2018-022 Added step type flag to append a ".0" to the end of the high level step - put in for Westinghouse single column format (wst1)
 			if (item == null) return "";
 			string sret = "";
 			switch (item.MyContent.Type / 10000)
diff --git a/PROMS/VEPROMS.CSLA.Library/Format/PlantFormat.cs b/PROMS/VEPROMS.CSLA.Library/Format/PlantFormat.cs
index 5cfb1be1..43118c10 100644
--- a/PROMS/VEPROMS.CSLA.Library/Format/PlantFormat.cs
+++ b/PROMS/VEPROMS.CSLA.Library/Format/PlantFormat.cs
@@ -4432,6 +4432,15 @@ namespace VEPROMS.CSLA.Library
 				return LazyLoad(ref _Inactive, "@Inactive");
 			}
 		}
+		// F2018-022 Added step type flag to append a ".0" to the end of the high level step - put in for Westinghouse single column format (wst1)
+		private LazyLoad<bool> _AppendDotZero;
+		public bool AppendDotZero
+		{
+			get
+			{
+				return LazyLoad(ref _AppendDotZero, "@AppendDotZero");
+			}
+		}
 		private LazyLoad<float?> _ColOverride;
 		public float? ColOverride
 		{