Day 2 of New Observatory
Today I put together the two halves of the observatory metal base in the correct location. Obviously there will need to be some courtyard tree trimming!
They were secured together by two bolts on the east and two bolts on the west side. One of the bolts on the east side is shown below.
Then I drilled an M10 hole through the tiles into the concrete below on each corner. I used an M10 through bolt (concrete anchor) to fasten down the base as shown below. See the you tube video here. I made sure tht the top of the bolt is below the level of the floor ledge on each corner.
I made sure that the metal base was level in east-west and north-south directions. The east west level is shown below
The north -south level is shown below