Geometry
Make a square
Click on the Z-axis on the compass in the bottom left corner of the screen to look at only the XY-plane. Right click in the empty white space and choose Select New Sketch Plane so that the plane we are building on will be on the XY-plane. Choose the rectangle drawing tool in the Sketch subgroup of the Design tab and click on Define rectangle from center . Select the origin and drag out the rectangle until it is the correct size or dimension the rectangle using the highlighted box, pictured below, that appears as you are making the rectangle. The height and width are 5 inches as defined by the problem.
Create Bar
Use the pull feature in the Edit subgroup and extrude the bar to 120 inches. The geometry is now complete and we can continue to meshing.
Go to Step 3: Mesh