Generator supports

The "holding" tank part of the waste treatment system is located under the generator. So I needed to raise the generator about 8" to allow access to the top of the tank and give room for the hoses and valves that are part of the system. I also decided to move the generator off center about 9" to give better access to the top of the tank and fittings.
My original design was a table that was supported by one of the stringers and a system of supporting walls. I then realized that there was really no need for the large flat surface. The generator is mounted on a steel tray with four attachment points, so if I made two support beams located under the pan at those attachment points they would carry all the load. Another problem with the table idea would be that then the bottom of the steel tray would be in contact with the fiberglass tabletop and would rust with no way to paint it. I plan to use 4 squares of 1/2" thick rubber between the supports beams and the tray bottom at the four points where it bolts to the beams. Pictures tomorrow...

I had some scraps of 1-1/2" coosa board( high density foam with a layer of fiberglass on both sides) which is plenty strong enough. So I built the beam and legs up by layering pieces of panel. I glassed the layer together than ground the sides smooth. In this picture you can see the glass work to seal the exposed ends. Next I glassed the sides as well, so the foam is completely encased in glass.

Here you see the two beams set in place with the support webs fitted all ready to be glassed on. There is a lot of glass work to this thing.
















A close up of one of the webs showing the foam fillets in two of the 3 inside corners. Fiberglass is weak in a 90 degree angle so I always put these fillets in to make a stronger joint. The plywood is marine grade hardwood ply.

Here are the beams all glassed in.
You can see the layers though the glass work. The thing is like a brick sh*t house. I don,t think I will have to worry about the generator breaking them.














 Today I finished this area up by glassing the top onto the waste treatment holding tank. So tomorrow I will get to move the generator back in place. Seems like ages ago that I moved it out of the way.

As usual I took pictures of all the glass joints. Here is one of the 5 pics of the joints holding the top on the tank. Each joint here is two layers of 1708 Biax tape and 1 layer of 1.5 Oz. mat alternating biax-mat-biax. the mat is in there to thicken the glass work at the the joint which makes it stronger.