Joists placed in UB

[jassdhali]

Guys,
Putting in a 178 x 102 x 19 UB to open up kitchen into extension.
Originally was going to use 6x2 timber joists as the roof span is 2.4m,
also the joists will be resting one side in the actual UB web.
I dont actually know if the internal dimension of the UB will leave a gap if I use 6x2 forcing me to waste time and use packers.
Would it be better just to get 7x2 or even 8x2 joists so they can be notched into the UB.
Thanks as always for any guidance given

 

[noseall]

The best thing to do is get some holes drilled in the web.

Bolt a timber into the web.

Fix jiify hangers and fit joists.

 

[jassdhali]

Is it quite straightforward for me to drill the web or should I get the UB supplier to do that?
Can I just bolt in a 6x2 joist, possibly at 600centres. Would that be sufficient Noseall?
Would I wrap the jiffy hangers around the joist before bolting in just to make it more secure?

Thanks again.

 

[noseall]

Get the steel suppliers to drill M12 holes at 600c/c preferably staggered starting say 450mm in from each end.
Bolt a suitably sized timber into the web preferably cls as this has rounded edges and sits nicely in the steel.
Fix the joists with screws initially, lining up the joist tops, then wrap the jiffys round after as it it easier than trying to line up hangers.