I agree all the way around on this but my statement was simply to the fact that I believe the AI has the right to request MTR's simply to satisfy his/her concern over the chemicals, even if MTR's are not required by code perse they could use the argument of admixture concerns, albeit a weak arguement.
Ca-Ca, I think that may be were I'm had - I'm sure it would be A-36, which IS NOT a spec covered in ASME unless the acceptable ASTM ed. and ad. is used, which would be hard to prove without an MTR, I guess, unless the mill, vendor, and subcontractor say it is SA-36, or at least meets the requirements of SA-36, right? I mean, if you order SA-36 from a vendor, do not request MTR's because they are not required, the vendor ships the grating and the shipping documents say SA-36 grating, where does the AI have authority? I understand he can pretty much accept or reject anything, if he's correct, I just want to make sure I am on the right thinking track here.