diff --git a/LuaLibs/ProcessSplit.lua b/LuaLibs/ProcessSplit.lua
index 3a8792f..5f8a800 100644
--- a/LuaLibs/ProcessSplit.lua
+++ b/LuaLibs/ProcessSplit.lua
@@ -834,7 +834,7 @@ function ProcessSplit.Make( Proc, nPhase, nRawId, nPartId, nOrd, sDownOrSideOrSt
          -- determinazione materiale da asportare
          local dSawThickCheck = dSawThick
          if dSawThick2 > 0 and bDoubleHorizCut then
-            dSawThickCheck = min( dSawThick, dSawThick2)
+            dSawThickCheck = max( min( dSawThick, dSawThick2), dOvmTail)
          end
          local dMaxElev = 0
          if vtN:getX() > 0 then