Case study · CSE Crosscom, Alfreton
RTS 85 out, RTS85 in
The Dorma RTS 85 is the concealed transom closer we find in more aluminium entrances than any other, and the two lifted out at Alfreton had done decades of work before the weather got into them. Their bodies were scaled with corrosion and the hydraulic control had gone, which is the point at which a transom closer stops being a closer and becomes a pivot. The replacements are current RTS85 units of the same format, so they dropped into the existing transom cut-outs without any modification to the frame. We fitted them as full kits, closer, arm and channel together, for the same reason we did at Flux Museum in London and Digisourced in Warwick: a new closer driving a worn arm knocks from the first week.
The clips on this page follow the job through. The old closer out of the head and turned over on the ladder platform, the lettering “RTS 85 made by Dorma” still readable under the scale; the pair of leaves swinging from inside the reception with the SEW and CSE vinyls on the glass; the D-ring pull, the push plate and the lock checked on the re-hung leaf; and a minute-long walk through the finished doors from the car park to the reception desk.
Why this was a safety job first
A framed glass door with no closer control is not simply inconvenient. On a forecourt with vans coming and going, a gust takes a leaf to the stop with its full weight, and whoever is coming through with a parcel or a cable drum takes the edge. The pair at CSE Crosscom opened onto exactly that: the reception, the collections and deliveries point and the fire exit for the front of the unit, all through the same doorway. That is why the company described it as a serious health and safety risk and why the visit was arranged promptly rather than put on a list. The same kind of urgent frame and closer work is described in our Mercedes-Benz Leicester case study.
Work completed at CSE Crosscom, Alfreton
- Scope — maintenance and repairs to the front pair of bronze aluminium entrance doors at Unit 1, Swanwick Court.
- Removal — each leaf lifted off its pivots in turn; corroded Dorma RTS 85 closers and arms removed; transom channels cleared.
- Installation — two Dorma RTS85 transom closer kits fitted (closer, arm, channel per leaf) into the existing cut-outs.
- Service — pivots, D-ring pulls, push plate, lock and keep checked on both leaves; closing and latching speeds set.
- Access — one leaf in use at all times; opening coned; unit trading throughout.
- Also — the unit’s timber fire exit doors photographed for the client’s maintenance record.
Commercial door repairs in Alfreton and Derbyshire
Commercial Door Maintenance and Security Ltd covers Alfreton, Ripley, Chesterfield and Derby for office, industrial and retail doors, with Dorma RTS85 and the other common concealed closers carried as stock. A photograph of the door head, or of the closer once the transom cover is off, is enough for us to confirm the kit and quote the same day. Our office buildings page covers reception entrances in more detail.
