Deltana DCHA1050 Hold Open Arm for DC10 Door Closer

The DCHA1050 is built specifically for Deltana's DC10 closer and nothing else. It is a replacement/upgrade arm for that body, so if the closer on the door is an LCN, Norton Rixson, Dorma or Cal-Royal unit, this arm won't mount. Check the label on the closer body for DC10 before ordering.

A hold open arm lets the door stand open at a set position instead of closing every time, which is what you want for a loading area, a move-in day, or a mechanical room being worked in. The DCHA1050 swaps onto a Deltana DC10 to add that function. Note that hold-open arms are generally not used on fire rated openings, where the door has to self-close and latch.

The Deltana DCHA1050 arm won't fit an LCN body. For a 4000 Series LCN, the hold-open version of the track is the LCN 4040SEH-3038 Hold Open Track; the non-hold-open equivalent is the 4040SE-3038 Standard Track. Those are track-arm closers, so the hold-open function lives in the track rather than in the arm itself.

Function. The Deltana DCHA1050 is a hold open arm, so the door can be parked open at the set point instead of closing every cycle. The LCN 4040SE-3038 is a standard track for fire and life safety door closers in the 4040SE Series, which is the non-hold-open counterpart and lets the door close on every swing. On a fire rated or life safety opening the door must be free to close, which is why the standard track exists as its own part. Specify the hold open arm only where the opening is permitted to stand open.

Two: Aluminum and Duro. Duro is the darker painted option, Aluminum the light one, so pick whichever matches the DC10 closer body already on the door if you want the arm and closer to read as one unit.

Steel, both in the Aluminum and the Duro version. The finish name describes the coating, not the base metal. Steel is the right call on an arm, since the arm and the shoe take the abuse when someone pushes a held-open door past its stop.

Not with this part. The DCHA1050 only serves Deltana DC10 closers, so a mixed fleet needs the matching accessory per brand, for example the LCN 4040SEH-3038 hold open track on 4000 Series LCN units. Standardizing on one hold-open part means standardizing the closer bodies first, then buying that brand's arm across the building.

No, and the two solve different problems. The Deltana DCHA1050 is a steel hold open arm for a DC10 surface closer, mounted at the head of the opening. The Dorma 15323 is a 1-1/2 inch offset bottom arm with cover, a standard duty part that connects at the bottom of the door on a pivot or floor closer installation, and it carries a fire rating of No. Same word, different location on the door and different closer type. If the DC10 is the closer on the job, the DCHA1050 is the arm that goes with it.

Each. One arm per unit, so a building with eight DC10 closers that need hold-open takes eight. There is no left or right version to specify, just the finish.

Yes, it is a commercial door hardware item, and the arm is steel. It is an accessory part, though, not a complete closer: it replaces the arm on a DC10 that is already hung on the door. If you are specifying from scratch for a high traffic commercial opening, you are choosing the closer first and the arm second.