Dorma 15323 1-1/2" Offset Bottom Arm with Cover

Handing matters on this one. The 15323 offset bottom arm is handed, so it only works on the swing it was made for. It's sold in LH - Left Hand and RH - Right Hand, and there is no reversible version. Stand outside the door (the side you push from with hinges on the far side): if the pivot side is on your right, order RH. Get it wrong and the arm won't take the door.

The Dorma 15323 is the bottom arm that connects the door to a floor closer on an offset hung opening. The floor closer does the work below the finish floor; the arm is the link between its spindle and the bottom of the door. It's a commercial, standard duty part for standard doors, and it comes with a decorative cap and mounting screws.

Yes, the offset dimension has to match. 1-1/2 inch is the offset built into this arm, and it is the distance from the door face to the pivot point. If your floor closer and top pivot are set for a different offset, the door will bind or won't sit square in the frame. Measure from the door face to the closer spindle centerline before ordering; if it comes out at 1-1/2 inches, this is the arm.

No, they solve different problems. The Dorma 15323 is a handed bottom arm for an offset hung door running on a floor closer, supplied with a decorative cap and mounting screws. The Deltana DCCA4041 is a cushion arm for the DC40 door closer and the Deltana DCHA1050 is a hold open arm for the DC10 door closer - both are arms for surface mounted overhead closers, where the arm links the closer body to the frame or door face at the head of the opening. An overhead closer arm has no bottom pivot function and will not carry an offset hung leaf.

The 15323 arm carries no fire rating. On a labeled opening, every component in the assembly has to be part of the listed hardware set, so don't specify this arm for a fire door without confirming the closer manufacturer's listed parts for that assembly.

Both are in the box. The 15323 ships as an arm package: the steel offset bottom arm, a decorative cover cap that conceals the arm at the bottom of the door, and the mounting screws. Nothing extra to add on the order for the arm itself.

No, and this catches people out on a fleet order. Because the arm is handed, a left hand door and a right hand door need different parts. Walk the openings, count how many swing each way, and order LH and RH quantities to match. The 1-1/2 inch offset does stay the same across all of them, so only the handing changes.

They belong to opposite ends of the door. The Dorma 15323 is a 1-1/2 inch offset bottom arm with cover cap for an offset hung door on a floor closer, handed left or right. The LCN 4040SE-3038 is a standard track for 4040SE Series fire and life safety door closers, the 4040SEH-3038 is a hold open track in the 4000 Series, the LCN 1260-30 is a cush shoe support for door closers with 3-1/16 inch reveal compatibility in the 1260 Series, and the LCN 1260-18QF is a quick fix bracket kit for 1000 Series closers. All four are head mounted hardware for surface applied overhead closers. None of them is an alternative to a bottom arm, and ordering one against a floor closer opening leaves the door with nothing at the sill.

The Dorma 15323 arm is handed and is ordered as left hand or right hand, which is how single acting offset hung openings are specified. A door that swings in both directions is a double acting application, and Norton Rixson covers that with the 30 Series center hung double acting heavy duty floor closer, rated to 200 lbs door weight and Grade 1. Because that closer is center hung, its bottom hardware is a different arrangement from a 1-1/2 inch offset arm - confirm swing direction and hung method before ordering either one.

Purely mechanical. The 15323 offset bottom arm has no electrical function, so there's no wiring, no power transfer and no low voltage to plan for at the bottom of the door.

No. The Cal-Royal 900-ACC is a door closer accessories kit built for the Cal-Royal 900 Series, so its contents are tied to that closer family. The Dorma 15323 is a specific 1-1/2 inch offset bottom arm package, handed, supplied with a decorative cap and mounting screws for use with floor closers. Closer accessory kits are series specific on both sides, so a 900 Series kit does not stand in for a Dorma offset bottom arm.

The Dorma 15323 offset bottom arm carries no fire rating, so a rated opening needs hardware selected against that requirement. Among floor and overhead closer hardware, the LCN 4040SE-3038 is a standard track built for fire and life safety door closers in the 4040SE Series. On a rated assembly, confirm the closer and its arm or track hardware against the opening's listing before committing to an offset bottom arm.