Why don’t you find one and ask him/her. You may want to include their thinking in your bid and design; before the bid, not after the fact, a day before construction starts and you’re both under the gun. They may want more than 3 or 4 hours to bless your work and put their neck on the line for you, never having worked with you before. Are you a registered engineer anyplace, what kind? Why don’t you become registered in Calif. instead of assuming you can buy someone’s stamp, on the spur of the moment? That way you get to keep all of the fees. Now days, it seems that even engineers of different disciplines don’t respect the duties and responsibilities of other engineers. It’s all a commodity like tons of 24" pipe, or kegs of bolts and nuts.