More builders advice please?

Originally Posted by Roberrrrt

Depends on roof covering - different tiles / slates and different manufacturers have different minimum pitches. Think the most shallow I've spec'd is a 15 degree.

I know mate, I've used pan tiles suitable for 12.5 degree pitch, I told ralph last night by pm that it depends on the tile, you can also overlap them a touch more.

Marley mods are one if the most common for lower pitch roofs.

yes you will be able to,

contact me if you want to know more details about how to get started.

So what's the difference between an RSJ and a beam guys?

Rsj's are sometimes referred to as 'I' beams and then beams.

[MisterTommyH]

Originally Posted by -Ralph-

So what's the difference between an RSJ and a beam guys?

RSJs are no longer produced in the UK - they are an obsolete section.

Common sections rolled in the UK are Universal Beams (UB) or Universal Columns (UC) - both can act as beams.

Easy way to spot them: An RSJ will have a taper on the inside of a flange. UBs and UCs have the inside of the flange parallel with the top/bottom depending on which you're looking at.

You sure about that tommy?

That's something I didn't know, I know about the U beams as that's what's specced on calcs but didn't know rsjs weren't produced anymore.

Everyone calls them the same anyway, us workers do anyhow

[MisterTommyH]

They're not in the TATA 'blue book', or on the web site or BS5950.

They're also not in any of the design software we use.

RSJ is a colloquialism thats stuck around - like people still refer to compo.

Not saying you couldn't get an RSJ as a special or reclaimed, but why would you when universal sections are more efficient.

Met the neighbours yesterday, this is what they have done



No additional beams required, just three walls and a roof?

Originally Posted by -Ralph-

This is basically just to allow us dining space in the kitchen or lounge (or both), so we can use the 'dining room' for something else.

Why didn't you guys think of that??

That protudes further into garden and it's less additional footage than what you first spoke about, jeez, some customers

[MisterTommyH]

Looks a bit like the GF part of what we've just done at a mates house.

Issues with this: I'm guessing from the velux's that you'd be looking to create a vaulted ceiling rather than a standard flat ceiling with light wells (you wouldn't get the advantage of the openings that way).

That being the case you couldn't use trusses so would have to build it in loose cut rafters (not a problem in itself). But to avoid eaves spread you'd need a ridge beam (had this as a requirement from bldg regs on the pictured one). That's an extra steel. The existing steel over the kitchen would need to be checked for a new point load at mid span (can't see that not working unless it was really small). Finally the lintel over the end window would need to be a bit more meaty than a standard lintel (the one pictured they put in a standard rather than what was specified and it visibly bowed so we have to come up with a bit of a Heath Robinson solution).

Can be done, it's just additional cost.