diff --git a/src/Speckle.Objects/Geometry/SolidX.cs b/src/Speckle.Objects/Geometry/SolidX.cs
new file mode 100644
index 00000000..bedec851
--- /dev/null
+++ b/src/Speckle.Objects/Geometry/SolidX.cs
@@ -0,0 +1,6 @@
+using Speckle.Sdk.Models;
+
+namespace Speckle.Objects.Geometry;
+
+[SpeckleType("Objects.Geometry.SolidX")]
+public class SolidX : RawEncodedObject;
diff --git a/src/Speckle.Objects/Other/RawEncoding.cs b/src/Speckle.Objects/Other/RawEncoding.cs
index 97fc1532..867e03d5 100644
--- a/src/Speckle.Objects/Other/RawEncoding.cs
+++ b/src/Speckle.Objects/Other/RawEncoding.cs
@@ -20,4 +20,6 @@ public class RawEncoding : Base // note: at this stage, since we're using this f
 public static class RawEncodingFormats
 {
   public const string RHINO_3DM = "3dm";
+  public const string ACAD_DWG = "dwg";
+  public const string ACAD_SAT = "sat";
 }