Specifications
The document details the specifications for a Door Class B15, designed for fire-proof protection in internal accommodations. It is suitable for assembly in walls with thicknesses of 50 mm, 25 mm, or steel walls.

Execution
The door-frame is constructed from 1.5 mm steel profile, with a stainless steel-covered sill. The door-leaf consists of two 0.7 mm PVC-covered or painted galvanized steel sheets, filled with mineral wool, and equipped with a mortise lock, patent cylinder, and stainless steel hinges.

Assembly System
Three assembly systems are described:

• System A: For 50 mm thick walls, using 1 mm steel sheet profiles.
• System B: For 25 mm thick walls, using 1 mm steel sheet profiles.
• System C: For steel walls, using 1.5 mm steel sheet profiles suitable for 6-10 mm thickness.

Delivery Range
The delivery includes the door with all fittings, excluding fixing elements.

Packing, Transport, Storage
The door-leaf is protected with cardboard and self-sticking tape for transport and storage. Goods are placed on pallets with wooden separators and must be stored in roofed accommodations.

Division, Mark, and Finishing
Types of doors include:

• Type I: Standard door
• Type II: Door with flat sill
• Type III: Door with flat sill and 15 mm ventilation gap

Varieties include right-hand (P) and left-hand (L) doors. Equipment options include kick-out panels, air grates, and sanitary locks. Finishing options are available in PVC-covered or painted steel sheets, with colors specified from the RAL catalogue.

Example of Designation
An example designation is provided for a Door Class B15 with specific features and finishes, corresponding to catalogue card no KK24-12/34-450 and drawing no N24-09/34-450.