diff --git a/LuaLibs/BeamLib.lua b/LuaLibs/BeamLib.lua
index 8fc9b25..2dcda90 100644
--- a/LuaLibs/BeamLib.lua
+++ b/LuaLibs/BeamLib.lua
@@ -718,10 +718,15 @@ function BeamLib.GetNzLimDownUp( b3Raw, vtN, vtOrtho)
                if vtN and ( abs( vtN:getY()) < 0.174) then
                   return -0.5
                else
-                  return -0.240
+                  return -0.24
                end
             else
-               return -0.174
+               -- N_HorAng < 10°
+               if vtN and ( abs( vtN:getY()) < 0.174) then
+                  return -0.383
+               else
+                  return -0.174
+               end
             end
          end
       end
diff --git a/LuaLibs/FacesBySaw.lua b/LuaLibs/FacesBySaw.lua
index 37ca39f..1a3bab4 100644
--- a/LuaLibs/FacesBySaw.lua
+++ b/LuaLibs/FacesBySaw.lua
@@ -242,8 +242,8 @@ function FacesBySaw.MakeTwo( Proc, nPhase, nRawId, nPartId, dOvmHead, sCutType,
    local bConvex = ( dAngT > 0)
    -- verifico non siano orientate troppo verso il basso e molto sbandate (oltre 10 deg)
    local bFaceOk = {}
-   bFaceOk[1] = ( vtN[1]:getZ() >= BD.NZ_MINB or ( not bConvex and abs( vtN[1]:getY()) < 0.174))
-   bFaceOk[2] = ( vtN[2]:getZ() >= BD.NZ_MINB or ( not bConvex and abs( vtN[2]:getY()) < 0.174))
+   bFaceOk[1] = ( vtN[1]:getZ() >= BD.NZ_MINB or abs( vtN[1]:getY()) < 0.174)
+   bFaceOk[2] = ( vtN[2]:getZ() >= BD.NZ_MINB or abs( vtN[2]:getY()) < 0.174)
    if  not bDownHead  and  not bFaceOk[1]  and  not bFaceOk[2]  then
       local sErr = 'Error : TwoFacesBySaw from bottom impossible'
       EgtOutLog( sErr)
diff --git a/LuaLibs/ProcessDoubleCut.lua b/LuaLibs/ProcessDoubleCut.lua
index ee182d0..5270304 100644
--- a/LuaLibs/ProcessDoubleCut.lua
+++ b/LuaLibs/ProcessDoubleCut.lua
@@ -1,4 +1,4 @@
--- ProcessDoubleCut.lua by Egaltech s.r.l. 2021/11/25
+-- ProcessDoubleCut.lua by Egaltech s.r.l. 2022/07/11
 -- Gestione calcolo doppi tagli di lama per Travi
 
 -- Tabella per definizione modulo
@@ -32,8 +32,6 @@ function ProcessDoubleCut.Classify( Proc, b3Raw)
    if BD.C_SIMM and BD.DOWN_HEAD then
       return true
    end
-   -- limite per facce da sotto
-   local dNzLimDwnUp = BL.GetNzLimDownUp( b3Raw)
    -- verifico se convesso
    local bAdj, _, _, dAng = EgtSurfTmFacetsContact( Proc.Id, 0, 1, GDB_ID.ROOT)
    local bConvex = ( not bAdj or ( dAng > 0))
@@ -48,6 +46,7 @@ function ProcessDoubleCut.Classify( Proc, b3Raw)
                return true, true
             end
          end
+         local dNzLimDwnUp = BL.GetNzLimDownUp( b3Raw, vtN)
          local bDownCut = ( vtN:getZ() <= dNzLimDwnUp)
          if bDownCut then
             local _, DimH, DimV = BL.GetFaceHvRefDim( Proc.Id, nFac)
@@ -59,23 +58,37 @@ function ProcessDoubleCut.Classify( Proc, b3Raw)
          end
       end
       return true, false
-   end
    -- altrimenti concavo, verifico le normali delle facce per tagli da sotto
-   for i = 1, 2 do
-      local ptC, vtN = EgtSurfTmFacetCenter( Proc.Id, i-1, GDB_ID.ROOT)
-      local bDownCut = ( vtN:getZ() <= dNzLimDwnUp)
-      if bDownCut then
-         -- dimensione della faccia perpendicolare alla linea di intersezione tra le facce
-         local vtN2 = EgtSurfTmFacetNormVersor( Proc.Id, 2-i, GDB_ID.ROOT)
-         local vtX = vtN2 ^ vtN
-         local frRef = Frame3d( ptC, ptC + 100 * vtX, ptC + 100 * vtN2)
-         local b3Ref = EgtSurfTmGetFacetBBoxRef( Proc.Id, i-1, GDB_BB.STANDARD, frRef)
-         if b3Ref:getDimY() > BD.MAX_DIM_DICE then
-            return true, true
+   else
+      local ptC = {}
+      local vtN = {}
+      ptC[1], vtN[1] = EgtSurfTmFacetCenter( Proc.Id, 0, GDB_ID.ROOT)
+      ptC[2], vtN[2] = EgtSurfTmFacetCenter( Proc.Id, 1, GDB_ID.ROOT)
+      local vtX = vtN[1] ^ vtN[2] ; vtX:normalize()
+      local vtY = { vtX ^ vtN[1], - vtX ^ vtN[2]}
+      for i = 1, 2 do
+         local dNzLimDwnUp = BL.GetNzLimDownUp( b3Raw, vtN[i], vtY[i])
+         local bDownCut = ( vtN[i]:getZ() <= dNzLimDwnUp)
+         if bDownCut then
+            -- dimensione della faccia perpendicolarmente alla linea di intersezione tra le facce
+            local frRef = Frame3d( ptC[i], ptC[i] + 100 * vtX, ptC[i] + 100 * vtY[i])
+            local b3Ref = EgtSurfTmGetFacetBBoxRef( Proc.Id, i-1, GDB_BB.STANDARD, frRef)
+            -- dimensione dell'altra faccia perpendicolarmente alla linea di intersezione tra le facce
+            local frRef2 = Frame3d( ptC[3-i], ptC[3-i] + 100 * vtX, ptC[3-i] + 100 * vtY[3-1])
+            local b3Ref2 = EgtSurfTmGetFacetBBoxRef( Proc.Id, 2-i, GDB_BB.STANDARD, frRef2)
+            -- se faccia grande
+            if b3Ref:getDimY() > BD.MAX_DIM_DICE then
+               -- se altra faccia piccola
+               if b3Ref2:getDimY() < BD.MAX_DIM_DICE then 
+                  return true, true
+               else
+                  return false
+               end
+            end
          end
       end
+      return true, false
    end
-   return true, false
 end
 
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