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
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