Hello everyone,
we want to mount our flat-screen TV on the wall in the bedroom. The spot is in a corner of the room. Since a corner naturally consists of two walls, I have two options for where to attach the bracket. One of them is an exterior wall.
This wouldn’t be an issue if the walls were made of masonry or concrete, but we’re dealing with wood frame construction. The studs are 70mm (3 inches) with 19mm (3/4 inch) particleboard and 9mm (3/8 inch) drywall. The exterior wall also has fiberglass insulation and a vapor barrier foil. This means that if I choose the exterior wall, I can’t use screws that are too long and might damage the vapor barrier (so a maximum of 9mm + 19mm length). Also, considering the weight, I would need stronger screws.
If I use the other wall, I won’t have the vapor barrier issue. However, there’s already a fairly heavy cabinet mounted on the other side of that wall (I’m not sure if that matters).
The main problem is that I’m not sure if the walls can support the weight. The bracket weighs 7 kg (15.4 lbs) and the TV 12.5 kg (27.6 lbs). Of course, the bracket also has an arm about 50 cm (20 inches) long, which creates leverage. This makes me a bit uncertain, so I’m asking here.
By the way, I have no idea where the studs are located. Otherwise, I would just screw directly into them.
Maybe you have some ideas on the best way to do this. Perhaps with some kind of drywall anchors designed for hollow walls?
Best regards,
xola123
we want to mount our flat-screen TV on the wall in the bedroom. The spot is in a corner of the room. Since a corner naturally consists of two walls, I have two options for where to attach the bracket. One of them is an exterior wall.
This wouldn’t be an issue if the walls were made of masonry or concrete, but we’re dealing with wood frame construction. The studs are 70mm (3 inches) with 19mm (3/4 inch) particleboard and 9mm (3/8 inch) drywall. The exterior wall also has fiberglass insulation and a vapor barrier foil. This means that if I choose the exterior wall, I can’t use screws that are too long and might damage the vapor barrier (so a maximum of 9mm + 19mm length). Also, considering the weight, I would need stronger screws.
If I use the other wall, I won’t have the vapor barrier issue. However, there’s already a fairly heavy cabinet mounted on the other side of that wall (I’m not sure if that matters).
The main problem is that I’m not sure if the walls can support the weight. The bracket weighs 7 kg (15.4 lbs) and the TV 12.5 kg (27.6 lbs). Of course, the bracket also has an arm about 50 cm (20 inches) long, which creates leverage. This makes me a bit uncertain, so I’m asking here.
By the way, I have no idea where the studs are located. Otherwise, I would just screw directly into them.
Maybe you have some ideas on the best way to do this. Perhaps with some kind of drywall anchors designed for hollow walls?
Best regards,
xola123
The entire house is actually built with standard particleboard panels. No OSB was used anywhere (except for some OSB we installed ourselves later in the bathroom). The house was built in 1979, before OSB was common, and there is no installation layer.
I had the idea to attach a board (OSB would be fine) to the wall to reinforce that spot. I would then mount the bracket on this board. With this intermediate layer, I can use thicker and longer screws.
Another option was to use two beams instead of a board. That would allow for really heavy-duty screws, but it might not look very good—although, if you paint them white...
However, I think the exterior wall is out of the question. I can’t imagine doing that without damaging the vapor barrier...
I had the idea to attach a board (OSB would be fine) to the wall to reinforce that spot. I would then mount the bracket on this board. With this intermediate layer, I can use thicker and longer screws.
Another option was to use two beams instead of a board. That would allow for really heavy-duty screws, but it might not look very good—although, if you paint them white...
However, I think the exterior wall is out of the question. I can’t imagine doing that without damaging the vapor barrier...
tomtom79 schrieb:
Spax screw into the wall and done.
It was advertised that each screw can hold about 50kg (110 lbs).Check the datasheets to see what a 20mm (0.8 inch) long screw can hold. A 5x50 (5mm diameter by 50mm length) screw can hold about 50kg (110 lbs), but that doesn’t help much in a 19mm (0.75 inch) panel. Especially since a 50cm (20 inch) cantilever can generate significant tensile forces, not just shear forces. Also, the drywall in front is not really favorable for resisting shear forces.
xola123 schrieb:
I had the idea to attach a board (for example OSB) to the wall to reinforce that spot. Then I would mount the bracket on this board.
With this intermediate layer, I can use thicker and longer screws.
..Why would a board hold better on the wall than the bracket directly?
What speaks against using Fischer KD4 anchors?
77.willo schrieb:
Why would a board hold better on the wall than the bracket alone?This way, you can use many more screws to attach the board to the wall, and also longer ones. I’m hoping this will increase the load-bearing capacity – though I might be completely wrong about that.
77.willo schrieb:
What’s wrong with the Fischer KD4?I wasn’t familiar with it before, but it looks promising.
70mm and 19mm (2.8 inches and 0.75 inches) for the substructure are sufficient.
To position the TV fully into the corner, use an aluminum tube, 70mm (2.8 inches) in diameter and the desired length, attached to the wall mount—similar to the type of tubing used for satellite dishes. This shifts the shear force from the mounting point to both corners along the entire length down to the floor.
The tube can be fastened with pipe clamps designed for water pipes. For aesthetic reasons, the threaded rod should protrude no more than 15mm (0.6 inches) from the wall, as the tube needs to sit almost flush in the corner.
If you attach the TV wall mount to the tube using the same pipe clamps, the wall mount becomes more height-adjustable as well.
To position the TV fully into the corner, use an aluminum tube, 70mm (2.8 inches) in diameter and the desired length, attached to the wall mount—similar to the type of tubing used for satellite dishes. This shifts the shear force from the mounting point to both corners along the entire length down to the floor.
The tube can be fastened with pipe clamps designed for water pipes. For aesthetic reasons, the threaded rod should protrude no more than 15mm (0.6 inches) from the wall, as the tube needs to sit almost flush in the corner.
If you attach the TV wall mount to the tube using the same pipe clamps, the wall mount becomes more height-adjustable as well.
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