Step 2:
Marking.
The assembled subframe was lifted from the stand and placed into position on the floor.
Using washers it was leveled all the way around so that it was flat in all directions.
Care was taken to ensure that it was positioned exactly.
once levelled a pen was taped to a small block of wood.
This was then run over the ground and the shape of the ground traced to the wood.
hopefully, in the last pic, you can see that the line drawn on the wood is not straight.
It actually is the exact shape of the floor.
This was repeated all the way around the wood on both sides.
Step 3. Cutting.
Once the floor profile was marked, all the wood was marked to ensure it went back together properly.
Alll the lagbolts were removed and the wood was cut using a bandsaw. I used a 9 inch model from LOWES.
Where the marks were different on both sides the shortest cut was taken. Then the whole thing was put back together
on top of
the stand. Areas where the 2 sides were different were sanded down with a belt sander
to make the edge level with each drawn line. The subframe was then laid back on the floor.
Fortunately it was a pretty tight fit to the floor, did not wobble and was still pefectly flat.