diff --git a/LuaLibs/ProcessDtTenon.lua b/LuaLibs/ProcessDtTenon.lua
index e5ca83e..12f9ec4 100644
--- a/LuaLibs/ProcessDtTenon.lua
+++ b/LuaLibs/ProcessDtTenon.lua
@@ -212,8 +212,13 @@ function ProcessDtTenon.Make( Proc, nPhase, nRawId, nPartId, dOvmHead)
             
             -- se esiste grezzo successivo non serve tagliare dal basso
             local bFromBottom
+            local dTotalLength = 0
             local nNextRawId = EgtGetNextRawPart( nRawId)
-            if nNextRawId and EgtGetRawPartBBox( nNextRawId):getDimX() > BD.MinRaw and not Proc.Tail then
+            while nNextRawId do
+               dTotalLength = dTotalLength + EgtGetRawPartBBox( nNextRawId):getDimX()
+               nNextRawId = EgtGetNextRawPart( nNextRawId)
+            end
+            if dTotalLength > BD.MinRaw and not Proc.Tail then
                bFromBottom = false
             else
                bFromBottom = ( b3Solid:getDimX() < BD.LEN_SHORT_PART and vtExtr:getZ() > 0.25)