Anti bird nesting cover for roof beam

On both sides of my house there are 5 beams sticking out. Unfortunately every spring birds start to build their nests on these beams making an awful mess on the lounge underneath. Worst of all most years a storm blows down the nests destroying them with the eggs in them. To stop this I created these brackets to screw down onto the beam and then fix a 3mm PVC sheet that I bent in the middle with the custom made washers. Takes two brackets and and for washers per beam.
One bracket for 120mm beams