Calculate type1 and 20mm shingle

[kazzab]

I have had a look at the calculators suggested on here but getting a bit confused ( I am blonde so not difficult )

Our driveway isn't square it's

8m x 7.5m x 3.4m x 7.5m

We are digging down 200mm

150mm of type 1 and 50mm of green coloured shingle

Can anyone help me calculate how many jumbo bags of each i will need ???

 

[theoldun]

I have had a look at the calculators suggested on here but getting a bit confused ( I am blonde so not difficult )
Our driveway isn't square it's
8m x 7.5m x 3.4m x 7.5m
We are digging down 200mm
150mm of type 1 and 50mm of green coloured shingle
Can anyone help me calculate how many jumbo bags of each i will need ???

Confused blond birds, no problems, but always have problems with confused blond blokes.
You state that you do not have a square drive, so you should have a rectangle with only two measurements, yet you have given four measurements so does drive consist of two rectangles all as the measurements given in your post..
Let us know and will give you some answers.
Regards oldun

 

[kazzab]

It's a funny shape as the drive is at an angle and the house is at a different angle thus giving us the 4 seperate measurements for each side - does that explain it ok ?

 

[kazzab]

For example called to builders merchants with the measurements, 1 said we need 15 tonne the other said 25 tonne

 

[SALL2009]

Can you draw and attach a rough diagram of the area in question.

You need to divide the whole area into smaller regular shapes (i.e. 3 rectangles or squares) you can then find the area of each one and add it together to get the area for the whole garden.

 

[chapeau]

Our driveway isn't square it's

8m x 7.5m x 3.4m x 7.5m

Simple geometry here I suspect. You can divide your driveway into two triangles, provide the dimensions of those, somebody will work it out.

PS

Area of triangle is

Base x height / 2

(You will need some simple trigonometry too....)

 

[theoldun]

It's a funny shape as the drive is at an angle and the house is at a different angle thus giving us the 4 seperate measurements for each side - does that explain it ok ?

No, with respect, makes no sense at all, so will take two rectangles all as sizes given above which equals 85.5ms by 150mm thick equals 12.82mc. As MOT can weigh in at between 1750kg and 2000kg we take the factor as 1875kg per mc which equals 24 tonne.
At the moment we are buying 10 tonne loads of MOT at £25.20 inclusive of VAT per tonne. Just had a quick look at Wickes price and they are charging £38.84 VAT inclusive for a bulk bag, however the catch is that they call a bulk bag a tonne, but that is purely for lifting and carriage rates and a bulk bag is only 850kg in weight, consequently the true tonne price is £45.69 inclusiv
To recap you require 24 tonne or 28 bulk bags MOT.
To save money. If you are using skips to remove surplus spoil, phone skip company and ask it they can deliver either MOT or crusher run, and ask for tonne price.. If they do not then phone a few more skip companies and ask same question. Goggle Bulk aggregate suppliers Kent and ask same question. Try Brett.co.uk. They have yards scattered round Kent
Crusher run is crushed concrete, brick etc. usually from 75mm down to dust and you can pick it up in 10 tonne loads at about £18 a tonne VAT inclusive.
Lay 100mm crusher run as sub base then 50mm MOT on top and wack with heavy duty wacker plate or vibrating roller to consolidate and settle the two together.
Dog and bone around and save yourself some wedge. No more time today will come back with your aggregate wearing course next couple days
A drawing would be very helpful to confirm above figures. Can you post rough sketch?
Regards oldun

 

[kazzab]

I have a sketch but can't see to upload it from my iPad. Will keep trying

Basically if you are standing looking at the drive

Both sides (left and right) are the same length - 7.5m

The far end is 8m

The end closest to you is narrower at 3.4m

 

[chapeau]

You cannot possibly calculate the area from your figures alone. Impossible. Cannot be done.

What's the distance between the opposite corners.

 

[theoldun]

That is quite clear, and means that width of drive across the middle is 5750 by length of 7500 by 150mm thick equals 6.46 mc equals say 12.2 tonne. Therefore in the loose you require 12.2 tonne MOT or in bulk bags say 15 number,
If you lay 100mm crusher run and then 50mm of MOT on top, you will need 8 tonne of crusher and 5 bulk bags MOT.
Going to watch football. Will come back tomorrow.
Regards oldun

Chapeau
Tis easy calculation and can be done two ways.
Add 8000 to 3500 divide by 2 gives you average width of 5750, multiply by 7500, or take area of 3500x7500 and area of triangle with adjacent side of 7500 and opposite side of 4500 and add two together.
Hope that will help you in the future
Regards oldun

 

[chapeau]

Morning Oldun,

That is quite clear, and means that width of drive across the middle is 5750 by length of 7500...

Get your pencil and rule out and try to draw it to scale on a piece of paper...

Chapeau
Tis easy calculation and can be done two ways.

i suppose you are correct.

Your way - assume and approximate.
My way - ask a supplementary question to obtain correct answer.

I reckon we are both of the age where we had meccano sets as kiddies. If you remember, the only shape which couldn't be pushed into another shape was a triangle. Any four sided shape could be pushed at the corners and the shape would change. When the shape changes the area changes too. We have been given the four dimensions of her drive, the area could be in a range.

Now as I have already learned far more from this thread from you than you have from me I shall not pursue this any more. I wait with interest your next post on how to build a decent drive

 

[maltaron]

There seems to be an awful lot of discussion about the area. The drive is 7.5 long, the average width os 5.7. therefore area is 42.5, times 0.15 deep is 6.4 cubic metres - approx 12 tons aggregate.

 

[theoldun]

Chapeau,
Our post was not meant to be disrespectful or to knock you in any way, but hopefully to assist you should such a problem come your way again.
Just one thing though our way is not to assume and approximate., but to take the factual figures given and calculate a factual answer, all as confirmed by maltaron.

kazzab wrote Jun 18, 2012 7:28 pm
150mm of type 1 and 50mm of green coloured shingle.

Sorry no such animal as green shingle. However there is Welsh green granite, sometimes called green basalt, 24mm down to 14, Green slate 30mm down to 5, Swithland green 20mm down to 5. or Griggon green, which we have not seen around for a while.
In our opinion Green slate is your best bet as it seems to lay and settle in the best.
Google this outfit and you can order sample.
Green Slate Chippings 20mm: Slate: Decorative Aggregates Store ...
decorativeaggregates.com/slate/.../Green+Slate+Chippings+20mm.ht...
Aggregates vary so much in weight and we allow tonne per metre cube. You will require 2 tonne spread at 40 to 50mm thick.
To make a job of the drive you should have round the perimeter 50x150 square top path edging bedded up to top of wearing course and edgings haunched up to within 50mm of top. Reasons. Retains sub base and wearing course within the drive and creates no soft spots to edge of drive. Stops the lawn growing into drive. Retains wearing course in the drive and not all over garden.
Regards oldun
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miscellaneous

 

[chapeau]

The facts.......

It's a funny shape as the drive is at an angle and the house is at a different angle thus giving us the 4 seperate measurements for each side

The 3.4m side is not definitely parallel to the 8m side. You have both assumed this is the case. You might be right, but if you are you got lucky.

Maths is not a democracy, there is a right answer and a wrong answer (and on occasion an imaginary answer but lets not go there). Just because two of you get it wrong doesn't mean you are right.

With deserved respect to you both of course.

Now if kazzab would get off her keyboard and provide us with the distance between two corners I will put this one to bed, but she appears to be too blonde to understand the question.

Don't you just hate it when people post again when they said they wouldn't ?

 

[theoldun]

Firstly, we have no idea, nor do we care whether kazzab is a young lady or a young gentlemen, nor whether kazzab has blond hair, black hair or no hair at all. Kazzab asked a question to which we tried to answer.
Secondly, no objections to some one posting again when they do not understand simple calculations
You seem to be concerned with the diagonals, but the diagonals are irrelevant and only required to ensure that angle C is 90 degrees. However to put your mind at peace the long diagonal should be 10965 and the short diagonal 8973.
Did you know how to work that out? If not, come back and we will explain.
We worked the metre square out by the length and average width to be 42.75ms, which is the easiest and quickest way
How ever lets do it a different way take the area of a rectangle 7.5x3.4 equals 25.5ms.
Take a triangle with an adjacent side of 4.6, opposite side of 7.5, hypotenuse of 8.793, angle A 58.48, angle B 31.52 angle C 90 Add the angles up and they come to 180 degrees and the area of the triangle is 17.25ms. With us so far. Good. Add 25.5 and 17.25 equals 42.75 ms same as above.
Will agree that we do not know whether long side and short side are parallel, but who cares if corner C is slightly out of square then you may need couple of barrows more or couple barrows less. No big deal
Goodnight, time for bed. oldun