Dividing gite wall built

The builders arrived yesterday with a huge cement mixer and a fork lift truck with a telescopic arm. The parpaing, concrete blocks, they were using were very very heavy (essential for good sound insulation between the gites) and without the fork lift I think it would have taken all day just the move the blocks let alone build a wall.

At the corners and ends of the wall (the wall has a kink in it to prevent building up the middle of an existing window) they knocked out a precast hole in some of the blocks in order to drop in strengthening metal rods from the top down to the floor. I didn't see it happen but I also think they drilled the foundation of the wall and inserted vertical metal rods which they then built the wall over. Once 2.5m high a special row of U shaped blocks was laid and a metal lattice placed horizontally in the U in and tied to the vertical metalwork. The U was filled with concrete/mortar and the vertical holes also filled. Apparently it's necessary for (free standing ?) walls over 2.5m to stop them toppling over. It's now finished and I wish I'd taken a photo of the wall part constructed.

|   8:33:19 PM