Fix timber section docs

Author: robbievanleeuwen

.readthedocs.yaml

@@ -12,7 +12,7 @@ build:
       - asdf global uv latest
       - uv python install 3.13
     create_environment:
-      - uv venv
+      - uv venv -p 3.13
     install:
       - uv sync -p 3.13 --frozen --extra rhino --extra dxf --no-group dev --no-group lint --no-group test
     build:

docs/examples/geometry/section_library.ipynb

@@ -295,7 +295,7 @@
    "source": [
     "### Import Modules\n",
     "\n",
-    "We start by importing the [timber_rectangular_section()](../../gen/sectionproperties.pre.library.timber_sections.timber_rectangular_section.rst#sectionproperties.pre.library.timber_sections.timber_rectangular_section) function from the section library, and the [Material()](../../gen/sectionproperties.pre.pre.Material.rst#sectionproperties.pre.pre.Material) object to define our timber material."
+    "We start by importing the [timber_rectangular_section()](../../gen/sectionproperties.pre.library.timber_sections.clt_rectangular_section.rst#sectionproperties.pre.library.timber_sections.clt_rectangular_section) function from the section library, and the [Material()](../../gen/sectionproperties.pre.pre.Material.rst#sectionproperties.pre.pre.Material) object to define our timber material."
    ]
   },
   {
@@ -317,7 +317,7 @@
    "source": [
     "### Create Geometry\n",
     "\n",
-    "Create a 120 deep by 1000 wide crosslaminated timber slab.\n",
+    "Create a 120 deep by 1000 wide cross-laminated timber slab.\n",
     "\n",
     "The following material properties are used:\n",
     "\n",
@@ -378,7 +378,7 @@
    "outputs": [],
    "source": [
     "geom_maj = clt_rectangular_section(\n",
-    "    d=[40, 40, 40], lay_orient=[timber0, timber90, timber0], b=1000\n",
+    "    d=[40, 40, 40], layer_mat=[timber0, timber90, timber0], b=1000\n",
     ")"
    ]
   },
@@ -461,7 +461,7 @@
    "outputs": [],
    "source": [
     "geom_min = clt_rectangular_section(\n",
-    "    d=[40, 40, 40], lay_orient=[timber90, timber0, timber90], b=1000\n",
+    "    d=[40, 40, 40], layer_mat=[timber90, timber0, timber90], b=1000\n",
     ")"
    ]
   },
@@ -721,7 +721,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.8"
+   "version": "3.13.3"
   }
  },
  "nbformat": 4,

src/sectionproperties/pre/library/timber_sections.py

@@ -8,33 +8,64 @@
 
 
 def clt_rectangular_section(
-    d: list[float], lay_orient: list[pre.Material], b: float
+    d: list[float],
+    layer_mat: list[pre.Material],
+    b: float,
 ) -> geometry.CompoundGeometry:
-    """Constructs a timber rectangular section.
+    """Constructs a CLT rectangular section.
 
-    Constructs a timber rectangular section of depth ``d`` and width ``b``.
-
-    .. note::
+    Constructs a CLT rectangular section, with layer depths ``d``, layer materials
+    ``layer_mat``, and width ``b``.
 
     Args:
-        d: Timber layer section thickness
-        lay_orient: A list of materials for each layer from top to bottom
-                    defined by the user.
-        b: Timber section width
-
-    Raises:
-        ValueError: Geometry generation failed
+        d: CLT layer section thickness
+        layer_mat: A list of timber materials for each layer (from top to bottom)
+        b: CLT section width
 
     Returns:
-        Timber rectangular section geometry
+        CLT rectangular section geometry
 
     Example:
-        The following example creates a 120mm CLT cross-section.
+        The following example creates a 120mm CLT cross-section:
+
+        .. plot::
+            :include-source: True
+            :caption: 120mm CLT section geometry
+
+            from sectionproperties.pre import Material
+            from sectionproperties.pre.library import clt_rectangular_section
+            from sectionproperties.analysis import Section
+
+            timber0 = Material(
+                name="Timber0",
+                elastic_modulus=9.5e3,
+                poissons_ratio=0.35,
+                density=4.4e-7,
+                yield_strength=5.5,
+                color="burlywood",
+            )
+            timber90 = Material(
+                name="Timber90",
+                elastic_modulus=317,
+                poissons_ratio=0.35,
+                density=4.4e-7,
+                yield_strength=5.5,
+                color="orange",
+            )
+
+            geom = clt_rectangular_section(
+                d=[40, 40, 40],
+                layer_mat=[timber0, timber90, timber0],
+                b=1000
+            )
+
+            geom.create_mesh(mesh_sizes=[0])  # a size of zero creates a coarse mesh
+            Section(geometry=geom).plot_mesh()
     """
     layer_geom: list[geometry.Geometry] = []
     for idx in range(len(d)):
         di = float(d[idx])
-        layer = lay_orient[idx]
+        layer = layer_mat[idx]
 
         timb_mat = layer