1 Scope

1.1 These requirements apply to hardware for swinging fire doors which have demonstrated in fire tests fire-resistive properties warranting their use with two-ply and three-ply tin-clad fire doors tested in accordance with the Standard for Fire Tests of Door Assemblies, UL 10B (NFPA No. 252).

1.2 Requirements for the location and time rating required for fire doors are contained in the International Building Code (IBC). Requirements for the installation of swinging two-ply and three-ply tin-clad fire doors are included in the Standard for Fire Doors and Other Opening Protectives, NFPA No. 80.

1.3 The hardware included in these requirements is intended for mounting standard two-ply and three-ply tin-clad swinging fire doors for protection of openings not exceeding the dimensions for the hourly classifications indicated in .

Type of door

Maximum area,

Maximum width,

Maximum height,

Hourly rating or class designation

square feet

(m²)

feet

(m)

feet

(m)

3-ply, single

–

–

6

1.8

12

3.6

3, 1-1/2, 1, 3/4

3-ply, in pairs

–

–

10

3.1

12

3.6

3, 1-1/2, 1, 3/4

2-ply, single

–

–

6

1.8

10

3.1

1-1/2, 1, 3/4

2-ply, in pairs

80

7.4

10

3.1

10

3.1

1-1/2, 1, 3/4

1.4 These requirements do not cover automatic releasing or closing mechanisms.

1.5 Deleted