How do I find floor joists to attach Roman rings?

[Larry81]

Hello,
I am planning to install Roman (Olympic) rings in the ceiling of the basement. It is a wooden house from the 1930s. I am fairly certain that the material (from the basement looking up) is plasterboard followed by wooden joists. I assume that I need to find these studs to mount the hanging mechanism. My question is how do I find wooden studs behind a plasterboard without drilling into the entire ceiling?

 

[Snappahaneklanen]

Tap on the ceiling to hear where it's just plasterboard (sounds hollow) and where there is a stud. You can also take a magnet and move it back and forth until it catches on the screw/nail that holds up the plasterboard, which is attached to the studs.

 

[Larry81]

And the battens go in the same direction as the rafters?

 

[Tompafix]

And the studs go in the same direction as the roof trusses?

That is not at all certain in an old house.

 

[Anna_H]

Draw in your "findings" with a pencil or pastel-colored chalk, for example, and you'll soon notice what applies. Chalk is easier to wash off afterward, I think.

 

[useless]

Do you know exactly how it is constructed? 'Träbjälklag' can mean a lot of different things. If not too much has changed since the 1930s, I would think it is some form of homogeneous wooden under-ceiling nailed to the floor joists.

 

[Larry81]

Do you know exactly how it's constructed? 'Träbjälklag' can mean a lot of different things. If not too much has been changed since the 1930s, I would think it's some form of homogeneous wood subfloor nailed to the floor beams.

No, I don't know what it looks like. It said in the prospectus that it was 'träbjälklag'. Do you think it's possible to attach these rings to the homogeneous subfloor nailed to the floor beams, or do I need to "find" a floor beam?

 

[useless]

You probably need to start by investigating a bit more about how it's constructed. 'Träbjälklag' just means that it is mainly made of wood. It doesn't say anything about the exact construction.
Perhaps the simplest thing is to drill a hole in a less visible spot?