Flitch Plate-In plain English please

[1975bloom]

Using their loads a 152x152x23 UB will do easily.

Or a 12x225 flitch (~21kg/m) and 2 47x225mm timber

I don't know how he got that load, I have a conservatory roof I want to make part flat roof Part pitch, flat roof 5310 wide x 1440 deep, Pitch or slopping part, 3m projection with light weight conservatory tiles and 2 flat roof domes 600 x 600.

 

[tony1851]

I don't know how he got that load, I have a conservatory roof I want to make part flat roof Part pitch, flat roof 5310 wide x 1440 deep, Pitch or slopping part, 3m projection with light weight conservatory tiles and 2 flat roof domes 600 x 600.

Also, have you got a drill that will take 17/18mm bits for the 16mm bolts specified? Prob. not, so you would need to get the plate drilled by the supplier = more ££.
Why not just get a steel beam and stop all this nonsense with a flitch beam???

 

[tony1851]

Using their loads a 152x152x23 UC will do easily.

Or a 12x225 flitch (~21kg/m) and 2 47x225mm timber

There, corrected it for you

 

[1975bloom]

Also, have you got a drill that will take 17/18mm bits for the 16mm bolts specified? Prob. not, so you would need to get the plate drilled by the supplier = more ££.
Why not just get a steel beam and stop all this nonsense with a flitch beam???

I would I need to know the size I need, I have to find another SE or maybe someone here can advise me.

 

[tomfe]

You can put smaller bolts in you might might need more.
The 'SE' who has done the cals has spent all of 30 seconds on it and not even looked at what it has superbeam has produced, ask for your money back or get them to calc a usable alternative.

 

[1975bloom]

You can put smaller bolts in you might might need more.
The 'SE' who has done the cals has spent all of 30 seconds on it and not even looked at what it has superbeam has produced, ask for your money back or get them to calc a usable alternative.

I did, he say he stand by his calculations, refuse to redo or refund

 

[tony1851]

I did, he say he stand by his calculations, refuse to redo or refund

The problem is that there can be many solutions, all of which could be proved 'correct' (ie they will not fail structurally) in civil litigation.
But that is not 'engineering' in its true sense, which involves tailoring the solution to the resources available, be they materials, labour, skills, time, access etc.
As your loading seems relatively light, and the span 5+ m, deflection is probably the critical factor in your case. As suggested by tomfe, a 6"x6"x23 could well do, or an 8"x4". Either of those would be a lot less hassle than the flitch beam.

 

[1975bloom]

The problem is that there can be many solutions, all of which could be proved 'correct' (ie they will not fail structurally) in civil litigation.
But that is not 'engineering' in its true sense, which involves tailoring the solution to the resources available, be they materials, labour, skills, time, access etc.
As your loading seems relatively light, and the span 5+ m, deflection is probably the critical factor in your case. As suggested by tomfe, a 6"x6"x23 could well do, or an 8"x4". Either of those would be a lot less hassle than the flitch beam.

Thank you