Planning to mount a 60 x 120 cm type 22 radiator weighing about 30 kg on a metal stud wall with plasterboard and OSB. I've read some other threads that recommend using thick wood screws, but not too long so they grip more on the OSB board than necessary. The wall plus the radiator bracket is barely 30 mm in this case - would a 5 x 40 mm anchor screw be suitable for hanging these? I have three brackets on the radiator with 2 screws in each bracket.
Just make sure the screws are threaded all the way, otherwise it only grips the drywall...
Why would it need to be fully threaded? It's mainly the OSB board that bears the weight in this case. It doesn't hurt to have full threads, but in my opinion, it's not entirely necessary. The most important thing is that the screw has a head that fits the bracket.
I completely agree with MathiasS, 30 kg is not a weight for a decent screw, provided it has good anchorage, which it will in this case.
As I understand it, it's better to use fully threaded screws as you can be sure that the threads grip in the OSB board. Of course, you can measure how much is not threaded and make sure to buy a partially threaded screw where you are certain that the threads grip into the OSB.
I meant what Riki76 wrote. It is only true if the OSB is outside the plasterboard, which I assume it is not. What you wrote is correct and is the reason why a fully threaded screw is still better if you are not engaged in measuring. Then you know it will hold well in the OSB. The threads in the plasterboard serve no purpose but don't really hurt either.
Edit: I think I found it, at least on the website, particle board screw FSP-PT 6x50 artnr 40917 fully threaded.
The particle board screw has a countersunk head, you want a flat surface against the console. I don't know Fischer's range but they have something equivalent.
99% of all plumbers mount radiators with bracket screws (also known as construction screws) fitting an 8mm magnetic socket for driving. No washer is needed with this.
Three brackets because Hornbach had it on their mounting wall where the 60 x 120 cm radiator was hanging for display. And I fell for it even though 49:- extra feels OK considering that the radiator valve (Danfoss) and the Korado radiator together cost 2,139:-.
99% of all plumbers mount radiators with bracket screws (also called construction screws) suitable for 8mm magnetic socket for tightening. No washer is needed with this.
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Edit:
And why three brackets on a radis that is only 120cm?
Explosion-proof?
Normally you mount three brackets on radiators 180cm and wider.
Do plumbers know how to use screws other than construction screws? haha. But they actually hold very well!
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