diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..5dd3d1b
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,3 @@
+1.2.0
+
+- Added separated classes of beam, shell properties, inherited from MaterialSection
diff --git a/ms/beam2.py b/ms/beam2.py
new file mode 100644
index 0000000..0007eaf
--- /dev/null
+++ b/ms/beam2.py
@@ -0,0 +1,15 @@
+import numpy as np
+import msgpi.sg as sg
+
+
+class Beam(object):
+    """[summary]
+
+    Parameters
+    ----------
+    object : [type]
+        [description]
+    """
+
+    def __init(self):
+        self.name = ''
diff --git a/sg.py b/sg.py
index 51f8691..01275a0 100644
--- a/sg.py
+++ b/sg.py
@@ -344,6 +344,66 @@ def offsetBeamRefCenter(self, offset_x2, offset_x3):
 
 
 
+class BeamProperty(MaterialSection):
+    """A beam property class (smdim = 1)
+
+    Parameters
+    ----------
+    MaterialSection : [type]
+        [description]
+
+    label : str
+    Label of the property that will be returned.
+
+    Mass
+
+    * msijo - Entry (i, j) of the 6x6 mass matrix at the origin
+    * msijc - Entry (i, j) of the 6x6 mass matrix at the mass center
+    * mpl - Mass per unit length
+    * mmoi1/mmoi2/mmoi3 - Mass moment of inertia about x1/x2/x3 axis
+    
+    Stiffness
+
+    * stfijc - Entry (i, j) of the 4x4 classical stiffness matrix
+    * stfijr - Entry (i, j) of the 6x6 refined stiffness matrix
+    * eac/ear - Axial stiffness of the classical/refined model
+    * gjc/gjr - Torsional stiffness of the classical/refined model
+    * ei2c/eifc/ei2r/eifr - Bending stiffness around x2 (flapwise) of the classical/refined model
+    * ei3c/eicc/ei3r/eicr - Bending stiffness around x3 (chordwise or lead-lag) of the classical/refined model
+
+    Compliance
+
+    * cmpijc - Entry (i, j) of the 4x4 classical compliance matrix
+    * cmpijr - Entry (i, j) of the 6x6 refined compliance matrix
+
+    Centers
+
+    * mcy/mc2 - y (or x2) component of the mass center
+    * mcz/mc3 - z (or x3) component of the mass center
+    * tcy/tc2 - y (or x2) component of the tension center
+    * tcz/tc3 - z (or x3) component of the tension center
+    * scy/sc2 - y (or x2) component of the shear center
+    * scz/sc3 - z (or x3) component of the shear center
+
+    Returns
+    -------
+    [type]
+        [description]
+    """
+
+    def __init__(self):
+        #: list of floats: (beam model) Neutral axes/Tension center. [x1, x2, x3]
+        self.tension_center = None
+        #: list of floats: (beam model) Elastic axis/Shear center. [x1, x2, x3]
+        self.shear_center = None
+
+
+
+
+
+
+
+
 
 class StructureGene(object):
     """ A finite element level structure gene model in the theory of MSG.