Step 1. Clean area were you need to grout well.
Step 3. lift the H beam and put it on the bolts/ anchore rods and check if it fits.
Step 4.. once your sure on it.. keep the beam on a side bit far from the work area.. lets say about 2 meters, so that you can have space for mixing the grout and other preprations.
Step 6. Pour the mix on top of the prepared area
Step 7. Put the steel H beam on top. But before that make sure to put a bitumen sheet on top.
Step 8. Observe with level instrument for this case they used a Sprite level.
9. Than tight the nuts until level shows its buble is to level.
Tip; if you look at the above vedio, you will notice that they have put a steel packing or steel sim or steel packer under the H beam steel column. This is that when the grouting set it may squeez the whole grout out.. and it will make it easy to level.