Have you tried asking the Parallam people? They would know the properties of their product better than anyone.
Are you running long bolts right through the beam and the steel plates, as in 16 bolts in total?
The snow loading and wind loading for your area would be required. This sounds more like a job for a local Engineer than a faceless Internet "expert," me included.
The advice from here, and any other Internet site, while it may be well-meaning, is only as good as the price you pay.
Big costs at stake if you get it wrong.