There are occasions where steel frames used in extremely high frequency or high use areas need to be supplied with additional reinforcing to eliminate potential door sag. These types of openings would include: main entrances to schools, rear exits where severe wind abuse could be a factor, auditoriums, gymnasiums, and the like. When these types of installations are required, there is a method in which this can be handled, efficiently and economically, through providing auxiliary reinforcing to standard
door frames. The specification for this is a follows:
When a high frequency preparation is required, the top hinge of the door frame shall be provided with an auxiliary reinforcement as shown in example ‘A’ or ‘B.’ For additional strength, the center and bottom hinge reinforcement may also be provided with additional reinforcements.