diff --git a/LuaLibs/BeamLib.lua b/LuaLibs/BeamLib.lua
index 83859fd..adb85e0 100644
--- a/LuaLibs/BeamLib.lua
+++ b/LuaLibs/BeamLib.lua
@@ -778,13 +778,20 @@ function BeamLib.GetNzLimDownUp( b3Raw, vtN, vtOrtho)
                else
                   return -0.383
                end
-            elseif b3Raw:getDimZ() < BD.MIN_DIM_HBEAM then
+            elseif b3Raw:getDimZ() < 300 then
                -- N_HorAng < 10°
                if vtN and ( abs( vtN:getY()) < 0.174) then
                   return -0.5
                else
                   return -0.259
                end
+            elseif b3Raw:getDimZ() < BD.MIN_DIM_HBEAM then
+               -- N_HorAng < 10°
+               if vtN and ( abs( vtN:getY()) < 0.174) then
+                  return -0.342
+               else
+                  return -0.259
+               end
             else
                -- N_HorAng < 10°
                if vtN and ( abs( vtN:getY()) < 0.174) then