I am building a reasonably large 'open barn' style, car port/garage
... 6.6m wide x 8.6m long. Open on front & one side, where
construction will be using bolt down base plates for 150x150 vertical
wood posts, these will run up to a Glulam beam that runs horizontal.
The posts will have 80 x 8mm thick steel plate Y brackets for
intermediate posts and knee brackets for corner posts.
There will be an angled piece of wood 150 x 150 in section running
upwards 'gallows' bracket style to fix horizontally to Glulam.
The steel plates bolted either side of & thru these and the vertical
I would like to 'let' the gallows bracket into the vertical; post
and the horizontal Glulam, is there any specific joint that is used for
The post is thicker than Glulam width, and will be stepped to allow
Glulam to 'rest' on top of post as well as be bolted to it.
If difficult to visualise there are 2 pics of this on :
I don't want to weaken either the post or the Glulam.
Glualam & Posts are in pre3ssure treated softwood.
The 2nd part to this is, should I also think of a joint between top of
the post and where it meets the horizontal Glulam beam... thought about
using some 30mm thick dowels, make the holes with a little play for
ease of lining up and fix with expanding polyurethane glue ... would
fill any gap.