NFPA 105-1999 Recommended Practice for the Installation of Smoke-Control Door Assemblies

NFPA 105-1999 Recommended Practice for the Installation of Smoke-Control Door Assemblies. 2-1.2 The addition of gasketing materials is also covered by NFPA 80. 2-1.3 If protection against leakage at elevated temperatures is desired, a suitable sealing system or gasketing should be pro- vided that will allow the door to meet the performance criteria in Section 3-2. 2-1.4* Gasketing, if used, should not inhibit the closing and positive latching of the door. Satisfactory closing and latching of the door should be verified after any gasketing has been installed. 2-1.5 For pairs of fire doors used for smoke control, double egress doors with leaves that swing in opposite directions are recommended with either overlapping astragals or other tested methods that do not hinder free use of either leaf. Dou- ble egress doors do not hinder the free use of either leaf and a satisfactory seal is provided. 2-1.6 Pairs of fire doors swinging in the same direction should be provided with split or compensating astragals adjusted so that closing and positive latching is not inhibited. Gasketing may also be used if the doors have been so tested. Use of a cen- ter mullion is another alternative, provided the required units of exit width in the opening are maintained. 2-1.7 If automatic-closing fire doors are used in lieu of self- closing fire doors, the release device should be smoke actu- ated. Delay on closing after actuation should not exceed 10 seconds. Where appropriate, interconnect with other fire alarm, suppression, and detection systems. 2-1.8 Because louvers are normally subject to leakage, they should not be used. (See 1-3.2 of NFPA 80.) 2-2 Nonfire Door Assemblies Used as Smoke-Control Doors. 2-2.1 Doors used should be substantial and may include glazing. 2-2.2 Frames used should be smoke resistant (see also 1-3.2) and of sufficient strength to support an operating door. 2-2.3 Nonfire doors should only be used for controlling ambi- ent and warm smoke. Nonfire doors used for controlling warm smoke should not be equipped with materials that would adversely affect the performance of the smoke-control door assembly at temperatures less than 400°F (204°C). 2-2.4* Doors should be self-closing or automatic-closing upon smoke detection. Exception: It is recognized that some codes call for the use of 20-minute fire doors or their equivalent and waive the requirement for a door clos- er. These doors are still desired even though a label cannot be provided because of the...