Increasing wood capacity via specialised braces?

[drscottuk]

I previously designed up some GLULAM purlins for a long, 45 degree pitch, domestic roof of a timber frame house. Standard C24 solid timber will not work for the loads (fails on bending), is there some form of custom steel knee bracing available to substantially increase the timber capacity?

Ive seen a few US patents referring to such bracing systems, but havent encountered anything on the market yet.

 

[csd72]

You could try a flitch beam (google it).

csd

 

[RARWOOD]

What is Standard C24 solid timber?

 

[csd72]

RARSWC,

C24 is a standard british stress grade for sawn lumber, I think it is 24N/mm^2 (MPa)flexural stress, about as high as you can get.

csd