Finishing in the dark this evening, we had drilled dozens of 13mm holes in the I beam pieces standing outside on timber planks!
We had to turn over the Steel I-Beams and the bigger pieces were very heavy indeed, but we copied a tool we saw in action by the delivery driver when the steel arrived last week, a lever to help with the moving of these massive pieces of steel!
We finished under the floodlights to drill through both the 10mm plate and the I beam at the same time so that all the 4 holes will line up just right when the final assembly is performed!