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3 replies
2k views
3 replies
Brace the staircase - anchor behind existing structure
I have a dilemma.
Our stairs feel like they are not completely stable against the wall where they are attached. The problem is that the stairs cannot be removed and they are attached to a concrete wall or a rather loose cement wall might be a better description.
Is there any sensible way to drill through the stairs, insert a plug into the wall, and fasten tightly afterward without having to move the stairs, which is not an option?
Our stairs feel like they are not completely stable against the wall where they are attached. The problem is that the stairs cannot be removed and they are attached to a concrete wall or a rather loose cement wall might be a better description.
Is there any sensible way to drill through the stairs, insert a plug into the wall, and fasten tightly afterward without having to move the stairs, which is not an option?
I also had the same problem with my new staircase. I got looong lightweight concrete plugs from Fischer. I ended up replacing them with through-bolts with machine threads in quality 12.9. My walls are made of Ytong/Siporex and even though the plugs were intended for that material, they were not completely secure. If you have the possibility to secure from the backside, do it!
Otherwise, there is anchor adhesive intended for lightweight concrete, etc., but I have no experience with that.
Otherwise, there is anchor adhesive intended for lightweight concrete, etc., but I have no experience with that.
Thanks... threaded bolt - does that mean you need to put a nut somewhere on the back? It's not an option for me, or have you attached the bolt somehow in the wall inside the staircase and fastened the staircase with a nut on the part of the bolt that sticks out?
I would just like to drill a hole, insert something like a plug in the hole, and fasten a bolt into the plug. The problem with that is that often the drill hole required for the plug is wider than the screw itself, which means in practice that the staircase can still move slightly. Is there no sensible solution for this? A bolt that starts threading 3 cm down and is as thick as the drill required for the plug up to that point, perhaps?
I would just like to drill a hole, insert something like a plug in the hole, and fasten a bolt into the plug. The problem with that is that often the drill hole required for the plug is wider than the screw itself, which means in practice that the staircase can still move slightly. Is there no sensible solution for this? A bolt that starts threading 3 cm down and is as thick as the drill required for the plug up to that point, perhaps?
Yes exactly, through bolt = machine-threaded bolt that goes through the staircase, the wall, and is tightened with a nut on the other side of the wall. Also put a compact laminate sheet on the back to distribute the load a bit more.
How is the staircase itself constructed? Is the stringer flush against the wall or with spacers/freestanding? What exactly is the wall made of?
Check the Fischer range, I've seen that Beijer among others has started to bring more and more of their products. I started with one of the facade plugs FUR, SXS, or SXR, it didn't hold for my staircase where the stringers are with spacers from the wall.
Facade plug FUR:
http://www.fischersverige.se/ResourceImage.aspx?raid=24514
Injection anchoring, lightweight concrete:
http://www.fischersverige.se/ResourceImage.aspx?raid=24340
How is the staircase itself constructed? Is the stringer flush against the wall or with spacers/freestanding? What exactly is the wall made of?
Check the Fischer range, I've seen that Beijer among others has started to bring more and more of their products. I started with one of the facade plugs FUR, SXS, or SXR, it didn't hold for my staircase where the stringers are with spacers from the wall.
Facade plug FUR:
http://www.fischersverige.se/ResourceImage.aspx?raid=24514
Injection anchoring, lightweight concrete:
http://www.fischersverige.se/ResourceImage.aspx?raid=24340
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