shuttered walls

[Stuckingeneva]

Ive got some walls to do, was just going to buy panels, but i have been offered the used of some steel formwork. But ive never done it before, do you need to put in foundations? And how to you tie them to the floor slab?

 

[dannewhouse]

Ive got some walls to do, was just going to buy panels, but i have been offered the used of some steel formwork. But ive never done it before, do you need to put in foundations? And how to you tie them to the floor slab?

it may work out more expensive to shutter them. panels are around £105 for a 15ft 4" panel. shuttering say 250mm columns? 1m high 15ft (4.572 long)
0.250 x 1 x 4.572 = 1.143 cube x £80 per cube? = £91.44
you would have to do a lot at once to warrant ready-mix and pump coming or your on pan mixer doing the odd 1 here and there is your time worth this?

there are benefits for both types
some reckon shuttered walls are nicer both sides and stronger
but you can just move panels to re arrange the layout if you want?

 

[jf850]

Google says one meter concrete weights 2.41 ton. So 300kg of cement @€200 ton is 60 then 100 kg of water leaves 2ton of stone @13.90 is 27.80. So it's costing €87.80 per cubic meter. But then that includes vat. Whereas he quotes 70 for readymix would be plus vat. Had pan mixer and sold it as it don't pay.

Google says one meter concrete weights 2.41 ton. So 300kg of cement @€200 ton is 60 then 100 kg of water leaves 2ton of stone @13.90 is 27.80. So it's costing €87.80 per cubic meter. But then that includes vat. Whereas he quotes 70 for readymix would be plus vat. Had pan mixer and sold it as it don't pay. Try to do jobs of at least 5m3 as that is min delivery with no small load charge around here

Cement is £3.10 per bag here if you buy enough i.e. £124 per tonne
£37.2 per 300kg + ballast at £34 per 2 tonnes = £71.20 per cube.

Was quoted £93 and £90 per cube for Rc 40 this week for 7.5 m loads in multiples.

rc40 had 4 cube on last job £80 per cube readymix

Try to do jobs of at least 5m3 as that is min delivery with no small load charge around here

I got the bill today for the concrete I used in the shed.
I used 30Newton 20mm chip , which was 62 euro + 13.5 vat , ( reclaimable on buildings anyway ) and I got the conveyor to fill the shuttering , which cost 8 Euro a metre. Well worth it for the location, as ground conditions and access for digger were both poor. The Floor I used 35N20 , which cost 65 + 13.5 vat , and didn't need conveyor.
I think the 5m min order stands around here as well.

The pan mixer certainly doesent seem to make much financial sense for me at those prices , except its handy for small jobs.

 

[Pan mixer]

Ive got some walls to do, was just going to buy panels, but i have been offered the used of some steel formwork. But ive never done it before, do you need to put in foundations? And how to you tie them to the floor slab?

Yes you do need foundations and when you are laying them make a very short wall about 50mm high on top with more concrete before the footing goes off, you can jam a few re-bars in vertically

at this stage too if you like. No bars in this wall, can't find one easily but you can just see the stub wall made by laying two bits of 4 x 2 on top of the nearly dry footing.

 

[quattro]

Ive got some walls to do, was just going to buy panels, but i have been offered the used of some steel formwork. But ive never done it before, do you need to put in foundations? And how to you tie them to the floor slab?

Ive done them before onto rolled stone but it needs to level and packed down well

 

[saly123]

Yes you do need foundations and when you are laying them make a very short wall about 50mm high on top with more concrete before the footing goes off, you can jam a few re-bars in verticallyView attachment 463234 at this stage too if you like. No bars in this wall, can't find one easily but you can just see the stub wall made by laying two bits of 4 x 2 on top of the nearly dry footing.

Just wondering why the 50mm stub wall.?
If you were wanting to shutter a wall on some concrete that is already laid... Would it work.? As in would the new shuttering wall seal to the current concrete floor or would you still get water going under the new shuttered wall.?

 

[Pan mixer]

Just wondering why the 50mm stub wall.?
If you were wanting to shutter a wall on some concrete that is already laid... Would it work.? As in would the new shuttering wall seal to the current concrete floor or would you still get water going under the new shuttered wall.?

The stub wall is to stop the bottom of the shuttering wandering about when someone dumps 15 tonnes of liquid concrete in the top as well as sealing the joint against damp ingress.

On established concrete I carefully mark out where the wall is going and set about the surface of the old concrete to give it a key, drill a half a dozen holes in the row and put some short bits (or even long bits to just below wall top if you are organised)of re-bar vertically,blow the dust away, wet and then put my two bits of 4 x 2 on top to cast a stub, this may be overkill but I don't want to find out later that i should have done more.

The intellectual heavyweight in charge here usually makes sure that these bits of vertical re-bar don't coincide with the bolts that hold the shutters together, but not always.

 

[massey 6480]

Right after buying a bundle of 5ft x 2ft pans for very small money .[emoji1] only downside been they need new timber panels . Anyone got a recommendation for what I can use to re sheet them St the lowest cost but still up to the job .

 

[Pan mixer]

Right after buying a bundle of 5ft x 2ft pans for very small money .[emoji1] only downside been they need new timber panels . Anyone got a recommendation for what I can use to re sheet them St the lowest cost but still up to the job .

Depends on how many times you are planning to use them - shuttering ply - once or twice, far Eastern - 10 to 20 times, more than that Marine.

I use 12 mm with 2 foot squares of metal on the frames - there is a slight bulge in the wall after but you have to look hard, presumably 18 mm thick if you are really fussy. My frames are in a photo above so you know what I mean, - each side is 2 x 8 x 4 sheets as well as a 4 x 5 foot sheet to make 21 feet to span the girders.

 

[jf850]

Right after buying a bundle of 5ft x 2ft pans for very small money .[emoji1] only downside been they need new timber panels . Anyone got a recommendation for what I can use to re sheet them St the lowest cost but still up to the job .

I think myself that it's worth going for the marine, either way . Finish , lasting , resale ability.
Those homemade 16 x 6 ones I showed recently , were done with ordinary ply. They haven't been filled 10 times , and there are bits of damage on the faces. I used STOU on them , seemed better than shuttering oil.
What would you call 'small' money €10 or less each ? Any keys or wedges with them ? Sorry for the questions , but half thinking of doing the same

 

[Mrs Brown]

Good chance the pans will need 18mm ply to take them out flush with frame.

 

[massey 6480]

I think myself that it's worth going for the marine, either way . Finish , lasting , resale ability.
Those homemade 16 x 6 ones I showed recently , were done with ordinary ply. They haven't been filled 10 times , and there are bits of damage on the faces. I used STOU on them , seemed better than shuttering oil.
What would you call 'small' money €10 or less each ? Any keys or wedges with them ? Sorry for the questions , but half thinking of doing the same

Got them for just under €8 a piece . All need to be re timbered and some need a bit of welding done and 4 are in a bad way . Have enough for 35ft of a wall at 7ft high. Spotted them on Donefeal there today and picked them up tonight . No keys or wedges with them . For what they've cost so far the money's small and same again on timber I'll have a set of pans for odd bits of walls around the place . So worth the punt I reckon. Mind there's a nice bit of work in re timbering them and a bit of welding .

 

[massey 6480]

Good chance the pans will need 18mm ply to take them out flush with frame.

No 12mm timber is what's used in these .

 

[massey 6480]

Depends on how many times you are planning to use them - shuttering ply - once or twice, far Eastern - 10 to 20 times, more than that Marine.

I use 12 mm with 2 foot squares of metal on the frames - there is a slight bulge in the wall after but you have to look hard, presumably 18 mm thick if you are really fussy. My frames are in a photo above so you know what I mean, - each side is 2 x 8 x 4 sheets as well as a 4 x 5 foot sheet to make 21 feet to span the girders.

The squares on the ones o got are 2ft by 1ft so the 12mm will do me fine .

 

[Turra farmer]

Cement is £3.10 per bag here if you buy enough i.e. £124 per tonne
£37.2 per 300kg + ballast at £34 per 2 tonnes = £71.20 per cube.

Was quoted £93 and £90 per cube for Rc 40 this week for 7.5 m loads in multiples.

Good calculation , can you do it at cement £111 per ton and block mix £9.80 per ton

 

[Pan mixer]

Since your calculator is broken...

£33.30 for cement + £19.60 for ballast = £52.9 = cheap.

 

[RWG Contracts]

Setting shutters up today, one of my favourite jobs

First time I've hired shutters in cause the steel ones I made are busy, well impressed with these clamps, the harder you belt that pin down the tighter they get

 

[Stuckingeneva]

Setting shutters up today, one of my favourite jobs

How are they being tied into the floor slab?

 

[RWG Contracts]

How are they being tied into the floor slab?

To stop them moving sideways?

Using these

 

[Half Pipe]

do you not use bolts through to other shutter? Is the angle bracers enough to keep them in place when pouring