My First Ubeam - selected profile looks a bit flimsy

[iandandav]

Done some calcs to select an apropriate UB for replacing part of a supporting wall.
Details
Average 3 bed terrace
Usual stuff upstairs
span of opening 2.56m
beam will sit against upstairs floor joists.
evenly distributed load

I used a few different UB profiles in the calcs and I kept being able to select smaller and smaller ones. Each fell within the limits.
Decided on
Just over 3M of UB 178 X 102 X 19
Drew out the profile and it looks a little flimsy.
Can anyone with experience of using these beams tell me if this looks ok.
I think I could even go smaller thatn this and still fall within the limits.

The attached pics are my calcs for anyone who would care to take a look and tell me if I have missed something. I have cheched then about 4 times and I cant see a problem with them

Thanks

Part 1

Part2

The profiles are drawn to scale on A4 sheet to get an idea of the sizes. I have gone for the shortest profile and as I said it look a bit flimsy what do you think.

 

[Aqua]

I did the calcs a different way but came out with the same conclusion.

3m x 178mm x 102mm UB.

But am happy to bow to better judgement.

 

[Static]

Yer seems fine.. about 65% utilized.. tidy up calcs and submit

 

[iandandav]

Thanks guys thats reasuring. Just to be absolutely certain anyone installed a beam in a similar situation with the same span? If so what beam did you use.

 

[tony1851]

10/10

 

[Aqua]

I did one a while ago with much the same span/steel size with no problems. Go for it, your on the right track buddy

 

[iandandav]

Thats good to hear. Thanks
Do you remember how much you paid for it. I have a quote of£85 plus VAT. Dont know if thats a good deal or not as I havent bought one before.

 

[Aqua]

Sorry for late reply, been on hols...

Price was about the same as you mentioned as i remember it.