Can I just drill into this using normal HSS bits? I only need to go another 5mm or so. Or are the beams used in construction hardened or anything that will make drilling into it hard work?
If it's the same as I had before you can drill into it but you might want to start with a smaller bit and graduate up.
If it's the same as I had before you can drill into it but you might want to start with a smaller bit and graduate up.