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 post.
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 this ? 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 : http://www.esnips.com/doc/8ca0d1b9-a479-4d60-8dac-1a9e2f4e3113/Centre.jpg
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.