Hello, I'm top floor in red sandstone tenement in Glasgow. We have a Bressumer beam in the bay window in the living room. I'd like to sink an anchor point for a swinging window seat into the beam. The beam is lathe and plastered and I'm looking for some advice about getting a secure fixing into the beam... -can I sink really long screws through the lathe and plaster into the beam or will that not be secure? - do I need to expose a part of the beam and skrew directly into it? I'm using a punch bag mount with 4 screws. Any advice or insights is very much appreciated, Thanks
First you will have to determine the condition of the beam: Is it level? Is any wood rot present? Does the beam have approx 100mm - 150mm bearings at either end? Can you get into the loft above it? Lath & plaster should be pilot drilled but its fine to drill thro it. Why not consider eyelet or hook screws?