Roofing timber calculations

[gjjh25]

I am trying to measure the timbers and areas required for a roof construction I am working on.

Could someone help me please I know i need to be using trigonometry, but this is not my strong point.

I have attached a spreadsheet showing the layout.

[MickG]

That drawing is not very clear to me.
Is that suppose to be a Plan view??
A drawing showing some other elevations, with a few dimensions might get you a better response.

[Kevin UK]

Hi gjjh25

Do you have access to the CAD drawing! Might be a lisp routine for it!

Try here

[gjjh25]

Yes it is just a plan view as an example really.

I have tidied it up a bit if that is any clearer?

[MickG]

Please find attached an Isometric Projection of My interpretation of your Drawing plan.
If not correct please, supply a similar view with the correct interpretation.