Rating for spring hinges?

RELATED FAQS

Question
Answer
Yes, the spring torque on 3SP1 butt hinge is adjustable.   See the 3SP1 instructions:  
There is no fire rating for butt hinges, but NFPA 80 says to use steel material and ball bearing hinges for fire rated openings.
There are a number of reasons the Von Duprin 55 or 88 series cross bar may not operate properly: The hinge case spring lifts both lever arms and the crossbar. To check spring, pu...