diff --git a/book/design_workflow/general_loads/variable_loads_4_special.ipynb b/book/design_workflow/general_loads/variable_loads_4_special.ipynb
index c26c1f5..15cdcd8 100644
--- a/book/design_workflow/general_loads/variable_loads_4_special.ipynb
+++ b/book/design_workflow/general_loads/variable_loads_4_special.ipynb
@@ -10,7 +10,19 @@
   {
    "cell_type": "markdown",
    "metadata": {},
-   "source": []
+   "source": [
+    "Accidental loads are typical high loads, with great effects on the structure.\n",
+    "These loads must therefore be accounted for in the design. Not all loads have to be withstood (e.g.: a\n",
+    "buffer can prevent ship collisions at a lock gate). Examples of accidental loads are:  \n",
+    "- Fire  \n",
+    "- (Gas)explosion  \n",
+    "- Collision by vehicles  \n",
+    "- Impact loads on roofs and guard rails,  \n",
+    "- High groundwater tables (flooding)  \n",
+    "- Earthquakes \n",
+    " \n",
+    "For a complete list and determination of the accidental loads see NEN-EN1991-1-7."
+   ]
   }
  ],
  "metadata": {