large span tie beam mid support beam

[fabgav]

Hi,
I am having gable to gable side extension.
Traditional built-in place roof system with top ridge and rafters on this would be easiest (going as DIY as possible) but the span is 8m, i've been advised you put a lower tie beam support beam in from gable to gable.
Has anyone got any pictures of this arrangement and an indicative size of that mid support beam?
any advice welcomed and no there is no articular or structural eng./ drawings.
Thansk

 

[blup]

Wouldn't it be easier to crane in a steel ridge beam and sit in the brick/blockwork at either end of the gable. 8 metres is a long span for a single wooden beam.

Blup

 

[fabgav]

Sorry the width of ext is 4m the front to back is 8.
By having a ridge and midd tie support beam the spans then becomes 2 sets of 4m tie beams braced to the middle support

 

[freddiemercurystwin]

any advice welcomed and no there is no articular or structural eng./ drawings.

How will you demonstrate to BC that the roof construction will be adequate?

 

[noseall]

there is no articular or structural eng./ drawings

Get some drawings done - quick, is my advice.