Drilling into RSJ lintel - will it take my bodyweight?

Discussion in 'Building' started by jollyboy, 16 Dec 2014.

  1. jollyboy

    jollyboy

    Joined:
    18 Jan 2014
    Messages:
    7
    Thanks Received:
    0
    Location:
    Norfolk
    Country:
    United Kingdom
    Hi,

    I'm installing a fingerboard called a Beastmaker (basically a wooden board you hang from or do pull-ups on) on to what I think is an RSJ-lintel. It's where the house was extended once. The board is to be installed using 6 screws which go in about 3 or 4cm, which come with it and presumably must be enough to easily hold bodyweight.

    Drilling through the side of the lintel, there's a void after about 3cm. That 3cm of drilling seems to be made up of some fairly solid plaster but just before reaching the void it felt like there was something a bit more solid which required a bit more push.

    I don't know anything much about lintels, but I'm assuming the the RSJ will be like an 'I'. I think then that means the plaster I've drilled into will be sitting on some steel - is that right?

    The big question is will 3cm of what looks like solid plaster be enough to easily hold my bodyweight? If not, I was thinking I could maybe fill the void with concrete and use some longer screws. Or is that a silly idea? And then I though about using some self-drilling screws which go through into the RSJ itself (like these), but maybe that's an even worse idea?

    Cheers,
    Clive
     
  2. Sponsored Links
  3. kazuya

    kazuya

    Joined:
    13 Sep 2012
    Messages:
    308
    Thanks Received:
    60
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    I doubt very much that 3 cm of plaster would hold your weight especially as you'll be swinging on it.
    if your sure its an RSJ there should be some wooden noggins whacked into it between the 2 flanges for the plaster boards to nail onto
    like this [​IMG]
    if you use a stud finder to find them, I think it would be better to screw into these than just plaster
     
  4. jollyboy

    jollyboy

    Joined:
    18 Jan 2014
    Messages:
    7
    Thanks Received:
    0
    Location:
    Norfolk
    Country:
    United Kingdom
    Thanks Kazuya,

    I've borrowed a stud finder so will try that later. The person I borrowed it from said that these noggins within RSJs are only loosely nailed in. Is that likely, or would you say they're generally okay and I'll be alright using them? Assuming I can find them, that is.
     
  5. kazuya

    kazuya

    Joined:
    13 Sep 2012
    Messages:
    308
    Thanks Received:
    60
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    well I normally knock them in pretty tight myself,
    as the weight will be pulling downwards I think you've got a better chance it holding than just into the plaster.
    depends on a lot of things really, how much you weigh, who studded out the RSJ etc
    if it was me, id try screwing into the noggins near the bottom if possible and see how it goes, you'll probably know when you start to put weight on it (don't just swing straight on it) if it feels strong enough, but if it doesn't feel like it will hold the only real alternative I can think of is find the ceiling joists and fix it to the ceiling instead or drill straight though the RSJ and bolt it.
     
  6. jollyboy

    jollyboy

    Joined:
    18 Jan 2014
    Messages:
    7
    Thanks Received:
    0
    Location:
    Norfolk
    Country:
    United Kingdom
    So you don't think these Grip-Its would be an option instead? I'm concerned I won't be able to find the RSJs.
     
  7. Sponsored Links
  8. if you only fix to the plasterboard then you, the fingerboard and the plasterboard will almost certainly end up in a heap on the floor
     
  9. kazuya

    kazuya

    Joined:
    13 Sep 2012
    Messages:
    308
    Thanks Received:
    60
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    no mate don't use the grip-ins
     
  10. jollyboy

    jollyboy

    Joined:
    18 Jan 2014
    Messages:
    7
    Thanks Received:
    0
    Location:
    Norfolk
    Country:
    United Kingdom
    I get it. I'll let you know how it goes. Cheers.
     
  11. tapir

    tapir

    Joined:
    22 Mar 2006
    Messages:
    205
    Thanks Received:
    13
    Location:
    Essex
    Country:
    United Kingdom
  12. jollyboy

    jollyboy

    Joined:
    18 Jan 2014
    Messages:
    7
    Thanks Received:
    0
    Location:
    Norfolk
    Country:
    United Kingdom
    Still not quite there with this...

    I'm now thinking the lintel is a box lintel as the metal detector seems to be picking up metal close to the surface on the bottom and both sides. Looking around, box lintels seem to be for walls only one brick thick, while this looks more like two bricks to me. I suppose that's because it was put in an older external wall. No paperwork to look at.

    Next question then: can I just drill into the box lintel? Not sure how thick/strong they are at the sides.

    Thanks,
    Clive
     
  13. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page