Plan dimensions

[rbourne]

i wonder if anyone can help and explain to me as I’m not a builder

I’m currently getting quotes for an orangery extension and I’ve asked for an internal dimension of 4500mn x 3100mm but the 3D CAD plans are coming back as written 4800mm and 3250mm on the CAD drawing why is that .

The 3250mm is coming off the house wall

So there 150mm bigger off all sides why us this? Where are the measurements taken from ?

 

[^woody^]

Those are external dimensions

 

[rbourne]

If those are the external dimensions I’d be expecting 5000mm x 3350mm surely??? With a 250mm cavity wall

With these dimensions I’m not getting the asked for 4500x3100 internal

 

[Notch7]

If those are the external dimensions I’d be expecting 5000mm x 3350mm surely??? With a 250mm cavity wall

With these dimensions I’m not getting the asked for 4500x3100 internal

Weirdly, the dimension leaders dont seem to line up with the external brickwork.

I would expect the dimensions bigger by 600mm one way and 300mm bigger the other

 

[rbourne]

He said that it’s a 250mm cavity wall. I’m therefore assuming then these plans measurements are from the inner side of the external brick and not from the innerside of the inner concrete block ? If that makes sense

That would make sense on 50mm insulation and 100mm concrete block =150mm

 

[Notch7]

He said that it’s a 250mm cavity wall. I’m therefore assuming then these plans measurements are from the inner side of the external brick and not from the innerside of the inner concrete block ? If that makes sense

That would make sense on 50mm insulation and 100mm concrete block =150mm

It makes no sense to take measurements from the inside face of the brick. I suppose the CAD drawing may have picked the wrong place.

250mm is unusual these days if its to be built under building regs. Perhaps it isnt!

 

[^woody^]

It would help if you posted the plan view - which would normally be dimensioned, not the elevations.

 

[freddiemercurystwin]

But they are very pretty drawings.