diff --git a/EExBeamConst.h b/EExBeamConst.h
new file mode 100644
index 0000000..d800e4b
--- /dev/null
+++ b/EExBeamConst.h
@@ -0,0 +1,23 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2020-2020
+//----------------------------------------------------------------------------
+// File : EExBeamConst.h          Data : 30.08.20          Versione : 2.2i1
+// Contenuto : Dichiarazione delle costanti per travi e pareti con BTL.
+//
+//
+//
+// Modifiche : 30.08.20 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+//-----------------------------------------------------------------------------
+enum EImBtlFlag { EIBFLAG_NONE =          0x0000,
+                  EIBFLAG_FLAT_POS =      0x0001,             // pezzi di piatto (prevale sul successivo)
+                  EIBFLAG_VERT_POS =      0x0002,             // pezzi in verticale
+                  EIBFLAG_SPECIAL_TRIM =  0x0004,             // trim speciale per pareti
+                  EIBFLAG_TS3_POS =       0x0008,             // pezzi come in TechnoEssetre (prevale sui precedenti POS)
+                  EIBFLAG_SORT =          0x0010,             // ordina i pezzi nel DB in base al nome
+                  EIBFLAG_USEUATTR =      0x0020} ;           // utilizza i parametri utente U per modificare la geometria delle features
diff --git a/EExBeamMgr.h b/EExBeamMgr.h
new file mode 100644
index 0000000..e0a3247
--- /dev/null
+++ b/EExBeamMgr.h
@@ -0,0 +1,44 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2020-2020
+//----------------------------------------------------------------------------
+// File : EExBeamMgr.h          Data : 30.08.20          Versione : 2.2i1
+// Contenuto : Dichiarazione della interfaccia IBeamMgr.
+//
+//
+//
+// Modifiche : 30.08.20 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+#pragma once
+
+#include "/EgtDev/Include/EgkGeomDB.h"
+#include "/EgtDev/Include/EExBeamConst.h"
+#include <string>
+
+//----------------------- Macro per import/export ----------------------------
+#undef EEK_EXPORT
+#if defined( I_AM_EEX)            // da definirsi solo nella DLL
+   #define EEX_EXPORT __declspec( dllexport)
+#else
+   #define EEX_EXPORT __declspec( dllimport)
+#endif
+
+//-----------------------------------------------------------------------------
+class __declspec( novtable) IBeamMgr
+{
+   public :
+      virtual ~IBeamMgr( void) {} 
+
+      virtual bool Init( IGeomDB* pGDB, int nFlag = 0) = 0 ;
+      virtual bool CalcSolid( int nPartId, bool bRecalc = false) = 0 ;
+      virtual int  GetSolid( int nPartId) = 0 ;
+      virtual bool ShowSolid( int nPartId, bool bShow) = 0 ;
+
+} ;
+
+//-----------------------------------------------------------------------------
+extern "C" {
+   EEX_EXPORT IBeamMgr* CreateBeamMgr( void) ;
+}
diff --git a/EExImportBtl.h b/EExImportBtl.h
index 97552f0..e1ce2c2 100644
--- a/EExImportBtl.h
+++ b/EExImportBtl.h
@@ -14,7 +14,8 @@
 
 #pragma once
 
-#include "/EgtDev/Include/EgkGeomDB.h"
+#include "/EgtDev/Include/EGkGeomDB.h"
+#include "/EgtDev/Include/EExBeamConst.h"
 #include <string>
 
 //----------------------- Macro per import/export ----------------------------
@@ -37,12 +38,3 @@ class __declspec( novtable) IImportBtl
 extern "C" {
    EEX_EXPORT IImportBtl* CreateImportBtl( void) ;
 }
-
-//-----------------------------------------------------------------------------
-enum EImBtlFlag { EIBFLAG_NONE =          0x0000,
-                  EIBFLAG_FLAT_POS =      0x0001,             // pezzi di piatto (prevale sul successivo)
-                  EIBFLAG_VERT_POS =      0x0002,             // pezzi in verticale
-                  EIBFLAG_SPECIAL_TRIM =  0x0004,             // trim speciale per pareti
-                  EIBFLAG_TS3_POS =       0x0008,             // pezzi come in TechnoEssetre (prevale sui precedenti POS)
-                  EIBFLAG_SORT =          0x0010,             // ordina i pezzi nel DB in base al nome
-                  EIBFLAG_USEUATTR =      0x0020} ;           // utilizza i parametri utente U per modificare la geometria delle features
diff --git a/EInAPI.h b/EInAPI.h
index 147b1bf..74a0163 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -109,6 +109,12 @@ EIN_EXPORT BOOL __stdcall EgtExportDxf( int nId, const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtExportStl( int nId, const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtExportSvg( int nId, const wchar_t* wsFilePath) ;
 
+// BeamManager
+EIN_EXPORT BOOL __stdcall EgtInitBeamMgr( int nFlag) ;
+EIN_EXPORT BOOL __stdcall EgtBeamCalcSolid( int nPartId, BOOL bRecalc) ;
+EIN_EXPORT int  __stdcall EgtBeamGetSolid( int nPartId) ;
+EIN_EXPORT BOOL __stdcall EgtBeamShowSolid( int nPartId, BOOL bShow) ;
+
 // Tsc Executor
 EIN_EXPORT BOOL __stdcall EgtInitTscExec( void) ;
 EIN_EXPORT BOOL __stdcall EgtTscExecFile( const wchar_t* wsFilePath) ;
@@ -310,6 +316,7 @@ EIN_EXPORT int  __stdcall EgtCopy( int nSouId, int nRefId, int nSonBeforeAfter)
 EIN_EXPORT int  __stdcall EgtCopyGlob( int nSouId, int nRefId, int nSonBeforeAfter) ;
 EIN_EXPORT BOOL __stdcall EgtRelocate( int nSouId, int nRefId, int nSonBeforeAfter) ;
 EIN_EXPORT BOOL __stdcall EgtRelocateGlob( int nSouId, int nRefId, int nSonBeforeAfter) ;
+EIN_EXPORT BOOL __stdcall EgtGroupSwap( int nId1, int nId2, BOOL bSwapRef, BOOL bMark) ;
 EIN_EXPORT BOOL __stdcall EgtChangeId( int nId, int nNewId) ;
 EIN_EXPORT BOOL __stdcall EgtErase( int nId) ;
 EIN_EXPORT BOOL __stdcall EgtEmptyGroup( int nId) ;
@@ -454,9 +461,11 @@ EIN_EXPORT BOOL __stdcall EgtSurfFrSubtract( int nId1, int nId2) ;
 EIN_EXPORT BOOL __stdcall EgtSurfFrIntersect( int nId1, int nId2) ;
 EIN_EXPORT BOOL __stdcall EgtSurfFrOffset( int nId, double dDist, int nType) ;
 EIN_EXPORT BOOL __stdcall EgtSurfTmRemoveFacet( int nId, int nFacet) ;
-EIN_EXPORT BOOL __stdcall EgtSurfTmAdd( int nId1, int nId2, bool bTwoColors) ;
-EIN_EXPORT BOOL __stdcall EgtSurfTmSubtract( int nId1, int nId2, bool bTwoColors) ;
-EIN_EXPORT BOOL __stdcall EgtSurfTmIntersect( int nId1, int nId2, bool bTwoColors) ;
+EIN_EXPORT BOOL __stdcall EgtCutSurfTmPlane( int nId, const double ptOn[3], const double vtN[3], BOOL bSaveOnEq, int nRefType) ;
+EIN_EXPORT BOOL __stdcall EgtCutSurfTmClosedCurve( int nSurfId, int nCurveId, BOOL bSaveOnEq) ;
+EIN_EXPORT BOOL __stdcall EgtSurfTmAdd( int nId1, int nId2, BOOL bTwoColors) ;
+EIN_EXPORT BOOL __stdcall EgtSurfTmSubtract( int nId1, int nId2, BOOL bTwoColors) ;
+EIN_EXPORT BOOL __stdcall EgtSurfTmIntersect( int nId1, int nId2, BOOL bTwoColors) ;
 EIN_EXPORT BOOL __stdcall EgtSurfTmResetTwoColors( int nId) ;
 
 // GeomDb Get
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 423016b..1af6926 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -115,6 +115,12 @@ EXE_EXPORT bool ExeExportDxf( int nId, const std::string& sFilePath) ;
 EXE_EXPORT bool ExeExportStl( int nId, const std::string& sFilePath) ;
 EXE_EXPORT bool ExeExportSvg( int nId, const std::string& sFilePath, int nFilter = 393) ;
 
+// BeamManager
+EXE_EXPORT bool ExeInitBeamMgr( int nFlag) ;
+EXE_EXPORT bool ExeBeamCalcSolid( int nPartId, bool bRecalc = false) ;
+EXE_EXPORT int  ExeBeamGetSolid( int nPartId) ;
+EXE_EXPORT bool ExeBeamShowSolid( int nPartId, bool bShow) ;
+
 // Tsc Executor
 EXE_EXPORT bool ExeInitTscExec( void) ;
 EXE_EXPORT bool ExeTscExecFile( const std::string& sFilePath) ;