thanks for the advise msquared. Generaly we do all of our inspections and load ratings in-house so I'm unfamiliar with the contracting aspects of load rating structures. If we do go the route you've suggested what would drive the ktr to give the bridge a higher load rating than would be...
AITC Technical Note 26 was just brought to my attention
https://aitc-glulam.org/shopcart/details.asp?category=&item=TN-26
This note deals with Glued laminated beams fabricated before 1970. Apparently before 1970 the grading requirements for laminates were not as stringent as they are today...
Don't know how I got selected for this but our agency is donating an approx. 40' tall christmas tree for the town square. The area were the tree is to be placed is exposed to large winds. I don't know have any information on soil Characteristics.
My first thought of how to support the tree...