Russell griffiths

Ah ha. I looked at one of those recently on the counter in the plumbers merchant. Spot on no silly Tupperware box needed whoever suggested such a silly idea ??

Could you not use a Tupperware box, mount and fix the box then have the lid removable for inspections obviously mount it vertically so lid faces towards you if you can visualise what I’m thinking.

Can you sister another joist onto the sides of the original joists but at the correct level.

Basically the flat section of ceiling will have ceiling joist in it, it’s these that tie the two sides together if you take these out and have a fully vaulted ceiling you need to stop it spreading that’s why he had them on top of the steel but if you want to drop the ridge height you need to design in a method to keep the rafters connected to the ridge.

You need to answer this. Are you having ceiling joists or is it a vaulted ceiling like the pictures as @Oz07 said the the ceiling joists act as a cross tie to prevent the roof spreading if it is a vaulted ceiling with no cross ties then the rafters need to be fixed securely to the ridge beam, otherwise when you load them they can physically slide down the face of the ridge beam. Just look at the angle you will cut on the end and you will see how this can happen you should go back to your designer and find the correct way of connecting

Thanks @JSHarris i have been chatting with @recoveringacademic Regarding this just trying to get a lot of quotes in to try and evaluate between traditional pile and beam, and fully insulated slab with some sort of ground improvement underneath.

@Neversaynever better pic.

You can cut your rafters INTO the sides of the steel instead of on top, look at my pic i tried to find a pic as I find it hard to explain sometimes can you substitute the steel beam for an LVL or a GLUELAM ,could make fixing easier you basically fit two timbers either side of the steel so it turns it into a box instead of an i shape then plumb cut your rafters to fit to the sides instead of on top regarding ridge tiles you can probably run a roof batten down the centre to pick up the fixings for that.

Thanks for your offer @JSHarris but at the moment I’m just chucking some ideas about and wouldn’t want to waste your time, to maybe alter things what would the difference be between a concrete pile with reo inserted, or a steel tubular pile with a concrete fill and reo.

So the picture is from a website for insulated floor slabs now to me it looks completely wrong with the piles penetrating through the insulation and connected to the floor slab reading the gumph on the website they explain that the cold area of the pile is the top part and the lower section is at a warmer temperature, so by insulating the top 600mm of pile will mitigate the cold bridge. Is this complete nonsense or does it make sense we are looking at 30 piles across the building so that is a huge amount of bridges if it didn’t work. Cheers russ

Your linky thing not working. @StructuralEngineer

Why do you need to tell anybody if you are not building them for 10 years. , build the structure strong enough, keep the drawings, cross the bridge in 10 years time.

It turns up pre mixed in a usable condition, you hire large plastic tubs and the truck tips it into the tubs, just like readymix concrete. You then cover the tubs with thin plastic to keep it damp. It should last 3-4 days so you need to plan your brickies and make sure they have a good run of work in front of them. Obviously you don’t order it on Friday. If you have a local plant you can go with a tub and collect if you have a couple of little jobs to do.

Morning i had another topic going about how much insulation to put on top of a bram and block floor so it look like I need to start getting a bit more technical, how do I calculate how good 200mm of insulation will be compared to 300mm and also the bearing this will have cost wise. Do I put in an extra 100mm at additional cost what is the payback I’ll be getting the wife involved in this as she’s the number cruncher, I’m just good at hitting things with a hammer. Cheers russ.

Gfa is 206m but that’s externally so wall thickness needs to be taken off. Will probably be at least 180m

As far as the Tetris system or jet floor go, I’m after something I can work of before I put down the finish concrete. The main construction is icf and I need a surface to work off, that I can screw bracing to with one of the lightweight systems I would need to install the finish concrete including the ufh, by doing this I will not be happy randomly screwing into the surface to install bracing. Would you be happy with 200mm of eps on top of the beam and block or would you put more in. if I was to use 3 layers of 100mm eps can anybody see a problem with multiple layers or is it better to use 1 layer.

Right then I would rather use a poorer insulation, but use more of it I have a distinct dislike for Kingspan and find it massively over priced for what it is. If I was to use eps sheets how thick would you go i am not limited by height, in fact I need to build up a fair bit as my ffl is rather high due to having a rather over engineered flood risk assessment. Ufh will be clipped to the top layer of insulation.

Trying to sort out all the odds and ends. How much insulation would you put on top of your beam and block floor just sorting out makeup of floor and levels. On top of the insulation will be 100mm of flowable concrete with ufh and what would be your preferred type of insulation cheers russ.

So a new battery one is silly money £900 All the cheap ones ship from China which is something I avoid. so looking at pre maid reo cages they all come from the factory with welded corners so going to think a bit about welding up my ground beams, as I can weld them on the stands and lift them into the trench with the excavator.

No picture on web site. I will have a search.

So the hire shop near me has a re bar tieing tool for £100 a week. Who wants to buy one and I will have it off them. I wont need it for about 6/8 weeks after I have finished I will sell it on to the next person.

Yes you are bob on. Its a mono pitch so thinking I joists. Details to follow if I can find a pic.

All this fussy detailing is what I am trying to design out i will post up my alternative thoughts.

This I think is what I am worried about. Will find some pics and come back.

I may not be explaining very well I will re think and try to do a sketch to explain. Thanks.