Category "A" Doors - No additional edge sealing system required to meet part 1 of UBC 7-2 (97).

• This category includes 45, 60 & 90-minute doors that have a 1/16" - 1/8" single ply of intumescent material that is located approximately 1/4" from each of the finished stile edges. No additional intumescent is required.

• All door applications (Category "A" Doors): Install "Listed" smoke seal gasketing on both door jambs and header (see drawings J and K). For door and transom assemblies with a transom bar, also install the "Listed" smoke seal gasketing on all edges of the frame around the transom.

• Pair with metal edge and astragal set: Install the metal edge and astragal on the doors. A Category "A" Door will not require any additional intumescent or smoke seal gasketing at the meeting edges (see drawing L).
• Pair without metal edges: The meeting edge intumescent is installed under Label Service. Apply a strip of "Listed" smoke seal gasketing on one leaf of the pair at the meeting edge (see drawing M).
• Door and transom assemblies without a transom bar: The meeting rail intumescent is installed under Label Service. Where meeting rail intumescent includes a smoke seal, no additional smoke seal gasketing is required at the meeting rails (see drawing P). Where meeting rail intumescent does not include a smoke seal, additional "Listed" smoke seal gasketing is also required at the meeting rails (see drawing Q).