Some of the videos I watched shows them rolling out the membrane. The one friend of mine who has a re-roof job under his belt said he wished they had hung the roll and not placed it on the roof. The ladders with the railings should support the roll, I may have to add a yoke of some kind to hold the roll supporting pipe. Thanks for posting, I am glad you have one of these jobs under your belt. You're very easy to find for advice.