diff --git a/docs/examples/geometry/section_library.ipynb b/docs/examples/geometry/section_library.ipynb
index 60c55339..1c06ee65 100644
--- a/docs/examples/geometry/section_library.ipynb
+++ b/docs/examples/geometry/section_library.ipynb
@@ -569,11 +569,7 @@
     "\n",
     "# create the geometry\n",
     "geom = clt_rectangular_section(\n",
-    "    d=[40, 40, 40],\n",
-    "    lay_orient=[0, 90, 0],\n",
-    "    b=1000,\n",
-    "    timb_mat0=timber0,\n",
-    "    timb_mat90=timber90,\n",
+    "    d=[40, 40, 40], lay_orient=[timber0, timber90, timber0], b=1000\n",
     ")"
    ]
   },
@@ -644,9 +640,9 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "section-properties",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
-   "name": "section-properties"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
@@ -658,7 +654,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.14"
+   "version": "3.12.8"
   }
  },
  "nbformat": 4,
diff --git a/docs/user_guide/geometry.rst b/docs/user_guide/geometry.rst
index 31d5b840..22921b7f 100644
--- a/docs/user_guide/geometry.rst
+++ b/docs/user_guide/geometry.rst
@@ -310,6 +310,14 @@ Concrete Sections
 
 .. _label-bridge-library:
 
+Timber Section
+""""""""""""""
+
+.. autosummary::
+    :nosignatures:
+
+    ~sectionproperties.pre.library.timber_sections.clt_rectangular_section
+
 Bridge Sections
 """""""""""""""