New terrace.

[scooby1]

I wonder if anyone can help me with the area of an intended terrace. The problem is that the area is an irregular quadrilateral. There are no right angles anywhere on the project and because only one side will have uncut slabs my guess is that it is going to take a lot of them to cover the area in a decent fashion. To make matters worse the head gardener has stipulated that the slabs that she likes, while being a regular shape, consist of squares & oblongs. The attached diagram is actually to scale. Thanks in advance for any help given.

 

[freddiemercurystwin]

So what's the question?

 

[Ian H]

I’d get 30sq/mtrs

 

[scooby1]

So what's the question?

How large, in sq. mts, is the area to be covered.

 

[scooby1]

I’d get 30sq/mtrs

No, that won't be anywhere near enough since slabs will have to be cut on 3 sides of the area because none of the sides are parallel. Plus the fact that she wants slabs of at least 3 different sizes.

 

[rsgaz]

How large, in sq. mts, is the area

Measure either of the diagonals, add it to the diagram, and I'll tell you.

 

[Ian H]

No, that won't be anywhere near enough since slabs will have to be cut on 3 sides of the area because none of the sides are parallel. Plus the fact that she wants slabs of at least 3 different sizes.

I think you will be able to re-use a lot of your offcuts.

There might be a calculator on the Marshalls site.

 

[freddiemercurystwin]

It measures about 27m2 so add on a percentage for waste will give you your answer. So Ian's 30 ain't far off! BTW I'm not convinced your dimensions are quite correct but really we need the diagonals.

 

[freddiemercurystwin]

Is the 4.370 a typo and should actually read 4.730? Because that dimension is spot on if so .....

 

[scooby1]

Is the 4.370 a typo and should actually read 4.730? Because that dimension is spot on if so .....

No, that is a correct measurement. Have added both diagonals as shown.

 

[rsgaz]

Top left triangle is 11.84m²
Bottom right is 13.98m²

So, total area is only 25.82 square metres.

 

[Ian H]

I went roughly half of each measurement so:

4.8x5.5=26.4
+10% wastage
= 29ish

 

[freddiemercurystwin]

Then you were incorrect when you said

The attached diagram is actually to scale.

You got your angles to pot!

As my CAD drawing illustrates.

 

[scooby1]

Then you were incorrect when you said
You got your angles to pot!
As my CAD drawing illustrates.

I didn't say that the angles were correct, in fact I knew that they wouldn't be. I drew it with Photoshop and used an adjusted grid overlay to make sure that the lengths of the sides were correct relative to each other.

 

[scooby1]

Top left triangle is 11.84m²
Bottom right is 13.98m²

So, total area is only 25.82 square metres.

Not disputing what you say but that is a big surprise.