Glucose protocol

I am a new grad and was wondering about the glucose protocol. When is it initated other than being symptomatic? Are your hospitals doing <5lb8oz and >8lb4oz or are you following some other policy? I had always worked with the above while in school and as a tech, this new place follows the same for the lower weight but doesn't initiate until over 9lbs for macro. I was under the impression macrosomia was 8lb 8oz? I am confused.

Also does any one know of a web site that has recommendations for these kinda protocols??

Thanks!!