Fitting Door Closer to a Hollow Door

[Witterings]

I'm relatively new to DIY so limited knowledge but always eager to learn ... I've just bought one of these door closers and it has a sentence in the fitting instructions that says drill into a cross beam ....

https://www.screwfix.com/p/smith-locke- ... -5mm/5711g

I'm guessing that means into solid wood as opposed to a hollow part of a door frame????

The type of door it'll be fitted to is one of the generic ones similar to this

https://www.wickes.co.uk/Wickes-Woburn- ... lsrc=aw.ds

I'd always assumed they were just hollow but maybe it's too big an area without something holding it together in the middle ... if they do have a solid cross beam how would I find out where it runs as there aren't any obvious signs on the door itself??

Any help would be much appreciated.

 

[Doghouse Riley]

No disrepect, but there isn't going to be much wood in a twenty-something quid door.

From memory, I think the only part that is solid, is the edges. A thin strip of wood all the way round, The interior sometimes has some corrugated paper filler.