I need at least 80’ for PtP with two RB333/XR5/Grid26dBi. I’m trying to attach guy wire for Rohn25 to my roof. What and where do you get the brackets for your roof that’s strong enough to hold at 50 mile/h wind?
You really should mount the guys to the ground with either ledge or 1+ yard of concrete.
Usually things are built to withstand 70-110mph, not 50.
If you need to mount it to the roof, it should probably be engineer approved, as you’ll either risk damage to your building when something happens to the tower, you risk your life working on the tower if it’s not fastened well enough or become loose/weak at a later date, or you risk the wrath of local government for not doing it according to manufacturer or engineer’s plans.