A variety of frames, casings and linings to suit the majority of doors held within the range, from standard through to fire rated. Does not include door furniture. Door furniture sold separately. This lining have been introduced to suit the regularised carcassing and CLS sizes, rather than traditional sawn carcassing. FDW30 Casings And Linings (Grooved For 15mm X 4mm Intumescent Strip) Adjustable width 610 - 838 mm. Our redwood pine Firecheck Metal Stud Door Lining is constructed to the highest specifications a using the finest grade timber. Fully certified for use with single leaf fire doors. All our timbers are sourced from environmentally friendly Scandinavian forests.