ᐅ Fill vertical 7 cm thick and 20 cm deep slot in load-bearing wall.
Created on: 8 Jul 2020 12:59
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Kr4pf3nHello experts,
I am currently facing a challenge and think this is a question for the masons in this forum.
I had to replace the electrical wiring in a two-family house. After careful analysis, it became clear that the 4-core 10mm² (10.7 AWG) cable also needed to be replaced with a 5-core 10mm² (10.7 AWG) cable. So, the cable was replaced from the basement up to the first floor. For this, the walls had to be channeled open with a slot about 7cm (3 inches) wide and 2.75m (9 feet) high. In the 1970s, the cable was simply embedded directly in the wall during construction. Now I have two fairly large slots in load-bearing walls in two apartments that obviously need to be repaired.
This is where I need advice from the experts among you.
How can I restore the maximum stability of these walls?
Have the slots significantly weakened the walls, considering they are vertical?
There are also quite a few cables inside the wall now: two main cables plus six NYM 2.5mm² (≈14 AWG) cables. Will they cause any problems when closing the slots?
As a “layperson,” I would have simply filled the slot gradually from bottom to top with expanding mortar, to apply some pressure on the whole structure. Or is that rather counterproductive?
I would appreciate some digital support from you.
Thanks in advance and best regards,
Sebastian
I am currently facing a challenge and think this is a question for the masons in this forum.
I had to replace the electrical wiring in a two-family house. After careful analysis, it became clear that the 4-core 10mm² (10.7 AWG) cable also needed to be replaced with a 5-core 10mm² (10.7 AWG) cable. So, the cable was replaced from the basement up to the first floor. For this, the walls had to be channeled open with a slot about 7cm (3 inches) wide and 2.75m (9 feet) high. In the 1970s, the cable was simply embedded directly in the wall during construction. Now I have two fairly large slots in load-bearing walls in two apartments that obviously need to be repaired.
This is where I need advice from the experts among you.
How can I restore the maximum stability of these walls?
Have the slots significantly weakened the walls, considering they are vertical?
There are also quite a few cables inside the wall now: two main cables plus six NYM 2.5mm² (≈14 AWG) cables. Will they cause any problems when closing the slots?
As a “layperson,” I would have simply filled the slot gradually from bottom to top with expanding mortar, to apply some pressure on the whole structure. Or is that rather counterproductive?
I would appreciate some digital support from you.
Thanks in advance and best regards,
Sebastian
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nordanney8 Jul 2020 14:46You really cut 20cm (8 inches) deep slots into a load-bearing wall? Almost through the entire thickness of the wall?
Hello Nordanney,
Yes, I had to. Otherwise, I wouldn't have been able to reach the cable. I didn’t want to open up the stairwell, so I went through the wall from inside the apartment. I didn’t expect the cable to end up almost in the stairwell. Actually, only the plaster from the stairwell is holding the wall together. Can you give me some good advice on how I should proceed now?
Good luck, Sebastian
Yes, I had to. Otherwise, I wouldn't have been able to reach the cable. I didn’t want to open up the stairwell, so I went through the wall from inside the apartment. I didn’t expect the cable to end up almost in the stairwell. Actually, only the plaster from the stairwell is holding the wall together. Can you give me some good advice on how I should proceed now?
Good luck, Sebastian
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nordanney8 Jul 2020 15:20Kr4pf3n schrieb:
Can you give me some good advice on how to proceed now?Sorry, since load-bearing walls may only be chased up to 30mm (1.2 inches) deep (with this depth, you could have extended 20cm (8 inches) in width, provided the wall is at least 30cm (12 inches) thick), the only option now is to consult a structural engineer. It might even be necessary to implement additional structural measures.
Kr4pf3n schrieb:
I’m currently facing a challenge.Uh, no, behind. If I understand correctly, you chased out a cable starting from the opposite wall. With such an unplanned approach, I probably don’t need to suggest that you illustrate your thread with blueprints. But maybe with photos?https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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HilfeHilfe8 Jul 2020 17:13Why didn’t you just cut new slots and not so deep? Personally, I would have left the old cables in place! Now the situation is hopeless.
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