The main beam assembly for the gantry crane is made using I-Beam B-36. I glued a B-8 I-beam into an C-12 channel then glued this to the top of the B-36. This will be the run way rail for the crane assembly. I sanded the bottom of the B-36 flat so it would glue to the A-4 on the side support. I also glued a spacer onto the main beam so that I could get more glue surface for the side support.
The C-12 channel on top of the side support is just to hide the top area where the four posts meet. I glued CFS-4 white styrene channels onto the B-36 to make the main beam look like a girder plate.
This is side view of the main beam assembly showing the side support leg glued in place. At the top is the B-8 / C-12 assembly then the main beam(B-36). The white styrene is the CFS-4 channel. The spacer between the main beam and the side support is an H-8 column.
This is the completed main beam / side support assembly.
