Deltana DP4041S Drop Plate for DC40 Door Closer - Standard Arm Installation

The DP4041S is a steel mounting plate that gets fastened to the door or frame face first, then the DC40 closer body mounts to the plate. You use it when the head frame face or the door top rail doesn't give you enough flat surface to land the closer's mounting holes directly. It's for standard arm (regular arm) installations of the Deltana DC40, and the plate is 1/4 inch thick.

No. The DP4041S is the standard arm version of the drop plate for the Deltana DC40. Parallel arm and top jamb mounting locate the closer differently, so the hole pattern on this plate is not the one you want. If your DC40 is going up parallel arm, order the drop plate made for that mounting instead.

Check the flat surface where the closer body will sit. On a standard arm install the closer mounts to the door face at the top rail with the arm reaching to the frame stop. If the top rail is too shallow for the closer's full mounting footprint, or a glass light or panel eats into that area, the closer has nowhere to land and you need the drop plate to give it a full bearing surface below the obstruction. If the rail is wide open, skip the plate.

No. A drop plate solves height: the Deltana DP4041S lowers a DC40 closer onto the door face when the frame stop or soffit does not give the closer body enough room. A deep reveal is a depth problem, and it is solved by a reveal-specific support such as the LCN 1260-30 Cush Shoe Support, which is built for 3-1/16 inch reveal compatibility on 1260 Series closers. Measure the reveal from the door face to the frame face before ordering; if the obstruction is vertical rather than horizontal, the drop plate is the part.

Four finishes: Aluminum, Duro, Gold and White. The plate mounts in plain sight beside the closer body, so pick the one that matches the DC40 you're installing. Match the closer finish, not the door.

Steel throughout, and it's specified for commercial applications. That matters on a drop plate because the whole closing force of the door transfers through the plate and its fasteners, not just through the closer shell. A 1/4 inch steel plate is what carries that load on a high-traffic opening.

Separately. The DP4041S is an accessory sold on its own, priced and packed each. The DC40 closer, its arm and its own mounting screws are a separate order. Get the plate on the same order as the closer if the opening needs one, otherwise the crew shows up without it.

No, and they're not interchangeable. A drop plate like the DP4041S relocates the closer body itself to a lower mounting surface. A bracket kit, such as the LCN 1260-18QF Quick Fix bracket kit, adapts how the closer attaches at the frame. A cush shoe support, like the LCN 1260-30, handles reveal at the arm end and is spec'd to a 3-1/16 inch reveal. An offset bottom arm such as the Dorma 15323 with its 1-1/2 inch offset is an arm component, not a mounting plate at all. Diagnose which end of the install is short before you order.

They address different mountings entirely. The Deltana DP4041S is a 1/4 inch steel plate for surface-mounted DC40 closers using a standard arm, installed at the head of the opening. The Dormakaba 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 pivoted or floor-closer arrangement, and it carries no fire rating. If your closer is a surface unit at the top of the door, the offset bottom arm will not mount to it.

No. The Deltana DP4041S is a mounting plate only; it changes where the DC40 closer sits, not how it functions. Hold open is a function of the arm or track. The LCN 4040SEH-3038 is a hold open track for 4000 Series closers, while the LCN 4040SE-3038 is a standard track for 4040SE Series fire and life safety door closers. Confirm whether the opening is a fire door before choosing hold open, since hold open on a rated opening has to release on alarm.

The Cal-Royal 900 Series Door Closer Accessories Kit is a kit-level accessory for commercial door controls on 900 Series closers, so it is the kit approach where the Deltana DP4041S is a single dedicated part for the DC40 with a standard arm. The tradeoff is fit: the DP4041S is a steel plate sized to one closer and comes in Aluminum, Duro, Gold and White so it matches the closer finish, while a series kit is tied to its own closer line. If you are standardizing a building on one closer series, buy the accessory that matches that series rather than mixing.