Split Steel Frames are two pieces allowing for an easier installation but also a variance in size. When put together, they have the appearance of a double rabbeted frame. When finishing walls or replacing a unit, the exact size of the finished wall may not be known; split steel frames allow for an adjustment space to fit these walls.
The RSP Split Steel Frame is fabricated from galvannealed steel. The base of the frame is 18-gauge while the closure is 22-gauge with 1” of adjustability. The base frame is kerfed to receive foam weatherstrip. It has been tested and can maintain a 90-minute fire rating. The frame is prepped for a 4” hinges that has a 5/8″ radius. The strike side is prepped with a 2-3/4” t strike.
To finish the look of the frame, snap-on casing is also available.
Jamb Depth
The jamb depth is dependent on the sill used and the height of the unit. A standard fire sill in a 6/8 unit can range from 4” to 8-1/2” jamb depths; if the unit is 7/0 or 8/0 then the jamb depth can only be 4-1/2” to 7-1/2”. A public access sill in a 6/8 unit can range from 4” to 8-1/2” jamb depths; if the unit is 7/0 or 8/0 then the jamb depth can only be 4-1/2” to 7-1/2”. There is also a no sill option and this only works with jambs that are 4-1/2” to 7-1/2” in depth.