Hello
I was setting up a shelf (like an Ikea Lack wall shelf) for a friend who moved into an old brick house in central Stockholm, the house is from around the 1930s.
Excitedly, I took my hammer drill and 8mm bit, bought Fischer SX 8x65mm plugs and 6x80 screws, thinking it should stay up well... After drilling with about 1/4 of what the machine can do, the plug didn't fit. The hole was too large. The hole was about 10mm wide, and there was only white drill dust on the floor. The wall is plastered and painted, so you can't see where the brick or mortar is.
I then bought 10mm plugs and returned to the wall... I inserted three 10mm plugs and fastened with the screw, and the shelf stayed up. When we had placed 1/6 of the books on the shelf, it started tipping forward. The wall/plugs aren't holding.
Now to my questions.
Did I manage to drill into the mortar, and is that why it's not holding?
Can I press in PL 600 or chemical anchor into the hole and use a 6mm threaded rod?
I need to put up more shelves on the same wall. Can I use the plugs above if I hit the brick (red drill dust), considering if I want to do something else with the wall in the future?
