Hanging 20kg projector in single drywall ceiling, with Molly

[Tekniker]

Do you have any idea what type of studs the drywall is attached to and how these are secured upwards?

I might sound pessimistic, but I would never hang up 25 kg without knowing what the screws are going into. Partly because what you're planning to hang is likely valuable, but primarily because a person or pet could get hurt if the projector falls down.

It's probably me trying to avoid work rather than you being pessimistic. I'll try to take a closer look. The house is new, but this task is a bit unclear.

I would never do that. What cc spacing do the ceiling studs have?

Can't you open a small inspection hole and see how it looks inside? Maybe you can get a couple of short boards that rest on glespanel (if that's how the ceiling is constructed)?

I'll take a look. I have an inspection camera, so maybe I can avoid making too much damage.

 

[Pjosk75]

It's probably me trying to avoid work, not you being a pessimist. I'll try to look a little more. The house is new, but this task is a bit unclear.

I’ll take a look. I have an inspection camera, so maybe I can avoid making too much damage.

Yes, you are at least proving the thesis that humans are naturally lazy 😉.
Good that you're going to check the roof's construction.

What is the rest for a projector that weighs 25 kg now that the year is 2025?

 

[Tekniker]

Yes, you at least prove the thesis that humans are inherently lazy 😉.
Good that you're going to check the construction of the ceiling.

What kind of projector weighs 25 kg now that it's the year 2025?

That's for sure.

Checking the blueprints, according to them, there is a 28mm spacing panel c/c 300 that the gypsum is attached to and it should be 2x13mm.

I'll try to verify this.

The projector is a few years old JVC that is a lamp model, the current laser one weighs 15kg. It's a bit more High End than Life Style

 

[Pjosk75]

Ah, if it is double plasterboard and wood with cc 300, it feels safer.
If the projector is 65 cm in diameter, I would cut a wooden disc from a suitable material that is slightly larger upwards than the projector. Then you can securely attach the projector mount, and the wooden disc can be fixed to 2 battens.
Sure, it's a bit more work, but the risk of everything falling down is minimal.

I assume your projector has slightly better picture, sound, and black levels than my 25-year-old Panasonic. On the other hand, it weighs about 5 kg and is mounted on a concrete ceiling with 3 plugs and screws.

 

[Alikzus]

Aha, I know those. Didn't know they were better than molly?

A friend who is a plumber recommended them many years ago, so that was his opinion at least. It would take a few years before we found them at K-Rauta, and since then, I only use expander-/molly-plugs if I want smaller dimensions and not heavy attachments. An advantage of the duck feet is that they are easier to take out/insert into the wall when the day comes to move, and I have moved a lot during my adult life (to a large extent caused by over a decade spent in Stockholm).

 

[SSSS]

It's probably me trying to avoid work, not you being a pessimist. I'll try to take a closer look. The house is new, but this task is a bit unclear.

I'll take a look. I have an inspection camera, so maybe I can avoid doing too much damage.

Take a magnet of a somewhat stronger type and you'll easily find the screws holding the drywall, avoiding the need to drill a hole for the camera.

 

[Tekniker]

Use a slightly stronger type of magnet and you'll find the screws holding the drywall easily and avoid drilling a hole for the camera.

Smart!! I'll mark with tape so you can see the pattern. There should be two screw lengths per stud where the boards splice, one length where it's just fastening?

 

[Tekniker]

A friend who is a plumber recommended them many years ago, so that was his opinion at least. It would then take a few years before we found them at K-Rauta and since then I only use expander-/Molly plugs if I want smaller dimensions and not heavy mounts. One advantage of the duck feet is that they are easier to pull out/push into the wall the day you move, and I have moved a lot during my adult life (largely caused by over a decade spent in Stockholm).

Yes, these holes are hopeless, even if you try to drill they become gigantic.

 

[Tekniker]

I found out that the rules go like this. I'll see where I want the bracket in the ceiling. I can make a 30x30 plate in wood or MDF that is screwed into these two rows, should hold one might think.

 

[Kane]

En plyfabit i skruvad i läkten och eventuellt med gipsankare beroende på läge om inte l

Fick fram att reglerna går såhär. Ska se var jag vill ha fästet i taket. Kan göra en 30x30 platta i trä eller MDF som skruvas i två dessa rader, borde hålla kan man tycka.

[image]

Det håller. Köp björkplyfa och måla i passande kulör.
(Men med cc 300 så kommer gipset hålla också om du kör med typ Molly....)