dormakaba RTS 85 Transom Closer - Hold Open

The dormakaba RTS 85 Hold Open is a concealed transom closer with mechanical hold-open function, housed within the door's top rail and leaving no visible hardware on the door face. The hold-open function allows the door to be pushed to a set angle and held there, releasing automatically when pushed further or pulled closed.

Three power sizes — EN3, EN4, and EN5 — cover door widths from 950mm up to 1250mm and door weights up to 110kg, making the RTS 85 suitable for a wide range of commercial aluminium door sizes. Both closing speed and latching speed are independently adjustable, and a fixed backcheck and cushioned backstop protect the door and frame from impact. Tested to BS EN 1154 and CE marked.

Key Features

• Concealed installation — no visible hardware on door face
• Mechanical hold-open — door held at set position, released by push or pull
• Tested to BS EN 1154 — CE marked
• EN3: max door width 950mm / EN4: max door width 1100mm / EN5: max door width 1250mm
• Maximum door weight: 110kg
• 70mm pivot point
• Adjustable sweep speed (130°–15°) and latching speed (15°–0°)
• Fixed backcheck and cushioned backstop
• Standard (12mm), 5mm extended (17mm), and 10mm extended (22mm) spindle options

Important — Hold Open and Fire Doors

Mechanical hold-open closers must not be used on fire-rated doors. For the non-hold-open version, see the dormakaba RTS 85 Non Hold Open.

Download the dormakaba RTS 85 Brochure (PDF)

Same-day despatch on orders placed before 2pm. Free delivery on orders over £100.