Closures for conveyor systems are construction products for sealing fire compartments. The closure mainly consists of a moveable element (flap or sliding leaf) and a fixed panel, both with clearances for the conveyor where necessary, as well as a guide system and closing devices.

If continuous conveyor systems are guided through fire-retardant or fire-resistant interior walls or ceilings, the required openings must be fitted with fire-resistant closures to prevent the passage of fire and smoke for the required duration in case of fire.

Regulatory framework

For closures for conveyor systems, DIBt grants national technical approvals (abZ) in combination with a general construction technique permit (aBG) ('combined decision'). European Technical Assessments (ETAs) can also be issued for corresponding products.

The basis for the national technical approval/construction technique permit is primarily testing in accordance with DIN 4102-5 (resistance-to-fire) and DIN 4102‑18 (continuous performance tests).

The basis for European Technical Assessments (ETAs) is the European Assessment Document (EAD) listed below under 'Technical rules'.

Since January 2021, DIBt also grants general construction technique permits for the assembly of fire and smoke control closures for interrupted conveyors (the conveyor system is interrupted in the area of the closure). Fire-resistant and/or smoke control doors and gates in accordance with DIN EN 13241 in conjunction with DIN EN 16034 supplied with a declaration of performance are used as closures. The construction technique in accordance with the permit may only be applied, if the following conditions are met:

• The closure must have a minimum fire resistance class of EI₂90 in accordance with DIN EN 13501‑2.
• The closure must be designed in a way that it is open as a normal position and only closes in case of fire.
• The closure must be fitted with an appropriate hold-open device (hold open device for closures for conveyor systems) covered by a general construction technique permit.
• The closure must be installed flush with the floor.
• The conveyor system must be interrupted in the closing area of the sliding leaf.
• The closure must be shut using permanently stored energy.
• It must be ensured that the shutting of the closure is not impeded by conveyed goods.
• It must be ensured that the closure, when shut, is not damaged by conveyed goods.
• The closure may only be installed in inner walls of structural works.

Please also refer to the relevant provisions of the federal states following MVV TB 2020/1, in particular Annex 4, Section 5.2.

Closures for conveyor systems may only be installed by companies whose expertise has been confirmed in writing by the holder of the national technical approval/construction technique permit or ETA.

Closures for conveyor systems must be fitted with an appropriate hold-open devices. After operation-ready installation of the hold-open device on site, it must be verified that it functions properly in interaction with the closure system for the conveyor (including testing of any connected sensors for monitoring the closing area). This acceptance test must be carried out by an inspection body in accordance with Part V, no. 11 of the Directory of recognised testing laboratories, inspection and certification bodies under the Building Codes of the federal states (PÜZ-Verzeichnis, linked on the right).