my concern is that the permit issuer will deny the permit and make us over engineer it with steel RSJ's for instance "just because they can".I wanted an independant estimate so I am fore armed so to speak. the building company are building to an agreed price so its in thier interests to build it as cheaply as possible at "minimum spec" so i need to get an idea if what i asked for is what i am getting.
You can still get drawings from the truss company. Go to Lowes Construction area in the back of the lumber departments, go to Home Depot, or go to any lumber company, and have them give you the phone number where the trusses get ordered from. Here in Ohio there are only a few truss companies that supply the whole state. Anyone that works in the engineering department of the truss company can supply the information that you need. They had all better been to college to learn structural engineering
When you tell the truss company what you are looking for, you can send them a copy of your drawing and they can give you an estimate from that, or they will tell you that to have that space and span, you will have to change this and that.
ANd like I said before, or at least I think I said.....you will not be unique. Any truss company that has been in business for any length of time will have stock drawings most likely. They don't just sit around doodling with nothing to do. I would guess they have drawings of almost any length, with any pitch, and with and without upper storage. For your state, or area, and calculated loads.