Middle Atlantic Forward 46U Rail DWR Pair - FWD-DWR-RR46

Middle Atlantic FWD-DWR-RR46 46U Forward Rack Rail Pair for DWR and SR Series

Overview

The Middle Atlantic FWD-DWR-RR46 is a 46U forward rack rail pair engineered specifically for DWR and SR series enclosures — the rail set you need when you're adding or replacing the forward mounting surface in an existing Middle Atlantic open-frame or wall-mount rack deployment. At 80.5 inches tall (204.5 cm), this pair spans the full height of a 46-rack-unit enclosure, giving you a clean, standard 19-inch EIA mounting surface for rack accessories and active equipment front-to-back.

This is a targeted infrastructure component. If you're building out a new DWR or SR series rack — or need to swap damaged rails without replacing the entire enclosure — the FWD-DWR-RR46 (often searched as FWD DWR RR46) drops in as a direct factory replacement with no improvisation required.

Key Features

• 46 Rack Units of Mounting Space: 46 RU across an 80.5-inch (204.5 cm) rail height means you have headroom for a fully loaded AV or security equipment bay — NVRs, patch panels, power distribution, and ancillary gear — without running out of vertical real estate mid-project. If your enclosure is currently under-populated, these rails give you room to scale without a new rack purchase.
• Steel Construction with Black E-Coat Finish: The steel rail body with black e-coat finish isn't cosmetic — e-coat (electrocoat) provides uniform corrosion resistance in environments where powder coat might chip at mounting points over repeated equipment installs and moves. For machine rooms, telecom closets, or any space with humidity cycling, this finish holds up better than bare steel over the equipment lifecycle.
• DWR and SR Series Compatibility: These rails are designed and dimensioned exclusively for Middle Atlantic's DWR and SR series enclosures. That specificity matters: generic aftermarket rails often introduce tolerance stack-up at the mounting holes, which translates to misaligned cage nuts and racked equipment that sits crooked. The FWD-DWR-RR46 eliminates that guesswork by being the factory-matched forward rail for this enclosure family.
• Forward Rack Rail Type: The forward rail position is the front vertical mounting surface — the face of the rack where equipment bezels, patch panel ports, and rack-ear fasteners land. Replacing or adding this rail restores standard EIA 19-inch mounting geometry without disturbing the enclosure's rear rail or side panels.
• Sold as a Pair: Both left and right forward rails are included, so a single order covers a complete front rail replacement. You won't need to source left and right sides separately or manage two line items for one repair or build-out.
• 10 lb Shipping Weight: At 10 lbs (4.5 kg) shipped, these are manageable for a single installer to handle and position inside the enclosure. No lift assist needed for the rail swap itself, though the enclosure may require a two-person install depending on configuration.

Integration & Compatibility

The FWD-DWR-RR46 is compatible with Middle Atlantic's DWR and SR series enclosures only. Before ordering, confirm your enclosure series — DWR (deep wall rack) and SR (studio rack) enclosures share this forward rail geometry, but other Middle Atlantic series (BGR, ERK, PD, etc.) use different rail profiles and are not interchangeable.

Standard 19-inch EIA rack equipment mounts to these rails using cage nuts or clip nuts in the standard square-hole pattern. The rail height of 80.5 inches corresponds to a 46 RU usable space, consistent with the EIA-310 standard for rack unit spacing (1.75 inches per U). Equipment with 19-inch rack ears — NVRs, switches, UPS units, patch panels, AV receivers — mounts to these rails in the normal way. For integrators building out network video recorders or PoE switch stacks in a DWR enclosure, this rail pair restores full mounting geometry without requiring enclosure replacement.

If you're spec'ing a complete rack build, consider pairing this with compatible rack power distribution and cable management accessories designed for the same DWR/SR enclosure family to keep the installation clean and serviceable.

Frequently Asked Questions

Q: What enclosure series is the FWD-DWR-RR46 compatible with?

A: The FWD-DWR-RR46 is designed for Middle Atlantic DWR (deep wall rack) and SR (studio rack) series enclosures only. It is not interchangeable with other Middle Atlantic enclosure families that use different rail profiles.

Q: How many rack units does the FWD-DWR-RR46 provide?

A: The FWD-DWR-RR46 provides 46 rack units (RU) of mounting space. The physical rail height is 80.5 inches (204.5 cm).

Q: Does the FWD-DWR-RR46 come as a single rail or a pair?

A: It ships as a pair — both the left and right forward rack rails are included in a single order, covering a complete front rail replacement.

Q: What material and finish are the rails?

A: The rails are steel with a black e-coat (electrocoat) finish, which provides uniform corrosion resistance at mounting points through repeated use.

Q: What is the rack hole pattern on the FWD-DWR-RR46?

A: The rails follow the standard EIA-310 square-hole pattern for 19-inch rack equipment, consistent with Middle Atlantic's DWR and SR series enclosure specifications. Standard cage nuts or clip nuts are used to mount equipment.

Q: Can the FWD-DWR-RR46 be used as a replacement part if existing rails are damaged?

A: Yes. The FWD-DWR-RR46 is the factory-matched forward rail for DWR and SR series enclosures and can be installed as a direct replacement without modifying the enclosure structure.

Marty Allison

The FWD-DWR-RR46 comes up most often in two scenarios: a repair job where the original forward rails took damage during a move or renovation, and a planned build-out where an integrator is adding equipment to an existing DWR or SR enclosure that was previously only partially populated. At 46 RU and 80.5 inches tall, this is a full-height rail pair — you're not patching in a partial section, you're replacing the entire forward mounting surface.

Technical Highlights:

• 46 RU / 80.5 in height: Covers the full vertical span of a 46U DWR or SR enclosure, restoring complete EIA-310 19-inch mounting geometry from top to bottom — no gap zones, no partial-U dead spots.
• Steel with black e-coat finish: E-coat provides more consistent coverage at punched hole edges than powder coat — those edges are exactly where corrosion starts in humid telecom closets or non-climate-controlled equipment spaces.
• Pair included: Left and right rails ship together at 10 lbs (4.5 kg) combined — both sides of the forward rail replacement in one order, no split sourcing.

Deployment Considerations:

• Verify your enclosure is specifically DWR or SR series before ordering — Middle Atlantic uses different rail profiles across product families and the FWD-DWR-RR46 will not fit BGR, ERK, or other series without modification.
• This is a forward rail only — it does not include rear rails, side panels, or mounting hardware. If cage nuts or clip nuts are not already on-hand from the existing enclosure kit, order them separately before the install date.

For a security integrator replacing rails in a DWR wall-mount enclosure housing an NVR stack or access control panel, the FWD-DWR-RR46 is the correct factory-matched component — not a generic substitute that requires tolerance shimming or hole-pattern workarounds.