changing roof pitch

[2019]

My span would be 8.5m from outside wall to outside with a a double skin of 100mm block and 100mm cavity included in the 8.5m. The height would be 3.1m and works out at a 35 degree pitch. If i was to drop the peak half a meter, what would the pitch be?

 

[^woody^]

What's the prize?

 

[2019]

What's the prize?

Ive a bowl of dingle berry soup put away for a special occasion. Ill share it with you if youd like. But first, i need an answer haha

 

[^woody^]

Bit of a crap prize, but you'll need to clarify the dimensions as an 8.5 span and 35°pitch gives a height nearly 6m not 3.1 as you stated.

 

[2019]

Bit of a crap prize, but you'll need to clarify the dimensions as an 8.5 span and 35°pitch gives a height nearly 6m not 3.1 as you stated.

The 3.1 m is from ceiling height to peak. I wasnt taking in below the ceiling. 6 m is on the plans.

 

[RichA]

Try this:
https://www.inchcalculator.com/roof-pitch-calculator/

Changes from 36.1 deg to 31.5 deg.

 

[noseall]

Dropping the gable height by 1 metre gives a new roof pitch approximately 26 -27 degrees.

 

[noseall]

Bit of a crap prize, but you'll need to clarify the dimensions as an 8.5 span and 35°pitch gives a height nearly 6m not 3.1 as you stated.

Eh?
A roof 8.5m wide at 35 degrees gives a height roughly 3m. You need a new calculator Woods.

Don't forget to half the span.

 

[noseall]

Sorry by dropping half a meter you end up with a roof 31.5 degrees and not suitable for say plain tiles.

 

[^woody^]

Oh silly me, I assumed a mono pitch extension. I must have missed the detailed info, I'll re-read it. Nope.

Looks like the soup goes first class to staffordshire.