Vertical Rod Fire Exit Device
Vertical rod exit devices are available in the concealed or surface versions. The rods connect the device's pushpad to the top and bottom latches. Vertical rod exit devices can be configured as top and bottom rod, or top rod only, commonly known as Less Bottom Rod (LBR). LBR exit device installations are normally for interior or doors within a secured area. Fire rated exit devices cannot be equipped with mechanical dogging as a fire rated opening must be able to have the exit device lock mechanism to latch during a fire. Non-fire rated exit devices can be mechanically dogged using an Allen wrench type key.