Remove steel beam welding, which trade?

[^woody^]

You bolt the timber to the web in the beam.

 

[Hl.house]

You bolt the timber to the web in the beam.

Thanks woody. This is what we will need to do. But the beams have no pre drilled holes. How do I drill holes in the beam? Is it structurally allowed?
BTW I have managed to put some good images... in case it helps.

 

[John D v2.0]

Yes just use a drill suitable for steel. Unless you remove the flange or something it won't be collapsing

 

[^woody^]

A sharp bit in a reasonable drill will do. Slow speed, not high. 11mm bit for m10 bolts will do

 

[Hl.house]

Thanks Joh and Woody!
Approx landing size will be 1m x 1m. What kind of timber would be good?
Something like this - http://www.wickes.co.uk/Wickes-Exterior-Grade-Joist-47-x-150mm-x-3m/p/101318
or
http://www.diy.com/departments/timber-sawn-treated-t47mm-w100mm-l2400mm-pack-of-4/570348_BQ.prd#

https://www.selcobw.com/sawn-treated-easi-edge-225-x-47mm-9-x-2-kiln-dried-c16-3m-fscr

https://www.selcobw.com/sawn-treated-easi-edge-timber-225-x-47mm-9-x-2-kiln-dried-c24-6m-fscr

 

[John D v2.0]

For joists you want to use structural timber usually c16. They won't need to be treated as it's a dry area indoors.

 

[Hl.house]

For joists you want to use structural timber usually c16. They won't need to be treated as it's a dry area indoors.

Thanks John. Is c24 not good enough?

 

[vards01]

C24 is a higher grade than C16 - You may pay more for C24 all depends what your local builders merchant stocks really, I use travis and their timber is stamped C24.

 

[Hl.house]

C24 is a higher grade than C16 - You may pay more for C24 all depends what your local builders merchant stocks really, I use travis and their timber is stamped C24.

Ah, thanks!!!