Middle Atlantic 4PK 21in. in. HORIZ ANGLE LACE - LL-HA21-4

Middle Atlantic LL-HA21-4 Horizontal Angle Lace Strip 4-Pack

Overview

The Middle Atlantic LL-HA21-4 is a factory-new, commercial-grade 4-pack of 21-inch horizontal angle lace strips engineered for structured cable routing inside standard rack enclosures. Built from steel with an angle-style profile, these lace strips give installers a clean, repeatable method for bundling and dressing horizontal cable runs without improvising with zip ties looped around bare rails. If you've ever opened a rack six months after commissioning and found a rat's nest where the structured cabling used to be, this is the component category that prevents that outcome.

The LL-HA21-4 (often searched as LL HA21 4) is designed specifically for Middle Atlantic's Middle Atlantic rack systems and integrates directly with the Lever Lock accessory ecosystem, providing a consistent horizontal anchor point for cable bundles at each rack unit position where you install one.

Key Features

• Steel Construction: These lace strips are fabricated from steel — not plastic. In a working rack that gets opened, re-cabled, and closed repeatedly over years, a steel angle lace holds its position and shape. Plastic lace strips crack, deform under cable weight, or snap during a late-night recabling session. Steel doesn't.
• Angle-Style Profile: The angle (L-bracket) form factor gives you a positive retention lip for cable bundles, so bundles stay dressed even when the rack door swings open or vibration is present. Flat bar lace strips allow bundles to ride up or shift — the angle profile eliminates that.
• 22.07-Inch Working Width: At 22.07 in (56.1 cm) wide, these strips span the full usable horizontal interior of a standard rack bay, giving you anchor points edge-to-edge for horizontal cable runs. No gaps near the vertical managers where cable tends to droop.
• Zero Offset: With a 0 in offset, the strip mounts flush to the rack rail face — no forward projection into the cable management channel. This matters in tighter rack builds where depth is allocated precisely to patch panels, switch faces, and vertical managers. You won't lose clearance to a protruding lace mount.
• 4-Pack Quantity — Installation Efficiency: Selling in a 4-pack means a single order covers multiple rack unit positions in one shot. For a structured cable plant across a multi-rack enclosure, ordering by the pack rather than by the piece reduces procurement cycles and keeps stock on the shelf for the next install. Middle Atlantic designates this as an Installation Time Saver — and the pack quantity is exactly why.
• Lever Lock System Compatibility: The LL-HA21-4 is part of Middle Atlantic's Lever Lock accessory line, which means these strips are designed to mount and demount without tools in compatible rack configurations. That's a real time saver during commissioning or when re-dressing cable for a major system upgrade — no fishing for a screwdriver to reposition a lace point.
• Shipping Weight 4 lbs for the Pack: The 4 lb (1.8 kg) shipping weight for four steel strips confirms these are substantial pieces — not stamped sheet-metal afterthoughts. That weight-per-strip ratio is consistent with a rack component designed to hold cable bundles under sustained load without flexing.

Integration and Compatibility

The LL-HA21-4 is purpose-built for Middle Atlantic rack systems and accessories that use the Lever Lock mounting interface. Before ordering, verify your specific rack enclosure model supports the Lever Lock horizontal accessory mounting pattern — not all Middle Atlantic frames share the same accessory rail interface. If you're building out a structured cabling backbone across a security operations center, a network rack enclosure with compatible Lever Lock rail spacing is the right pairing.

These strips are also a natural complement to vertical cable managers and patch panels in the same rack — horizontal lace strips work in tandem with vertical management to create a fully dressed cable plant. For environments where cable volume is high (dense IP camera systems, multi-NVR rack builds, or high-port-count switching infrastructure), installing lace strips at every 2–3U keeps bundle diameters manageable and maintains bend radius compliance on Cat6/fiber runs.

What's in the Box

• 4x Middle Atlantic LL-HA21-4 steel horizontal angle lace strips (21 in, 0 in offset)

Frequently Asked Questions

Q: How many lace strips are included in the LL-HA21-4?

A: The LL-HA21-4 is a 4-pack. Each pack contains four steel horizontal angle lace strips, each 21 inches in working length (22.07 in / 56.1 cm overall width).

Q: What rack systems is the LL-HA21-4 compatible with?

A: The LL-HA21-4 is part of Middle Atlantic's Lever Lock horizontal accessory line and is designed for Middle Atlantic rack enclosures that support the Lever Lock accessory interface. Verify your specific rack model's accessory rail compatibility before ordering.

Q: What material are the LL-HA21-4 lace strips made from?

A: Steel. The angle-profile strips are steel construction, which provides durability and shape retention under repeated cable dressing and rack access over the life of the installation.

Q: What is the offset on the LL-HA21-4?

A: The offset is 0 inches. The strip mounts flush with the rack rail face, so it does not project forward into the cable management channel — important for depth-constrained rack builds.

Q: Do the LL-HA21-4 strips require tools to install?

A: The LL-HA21-4 is part of the Lever Lock accessory system, which is designed for tool-free mounting and demounting in compatible Middle Atlantic rack configurations. Check your rack enclosure's Lever Lock support to confirm tool-free installation applies.

Q: What is the shipping weight of the LL-HA21-4 4-pack?

A: The shipping weight is 4 lbs (1.8 kg) for the complete 4-pack.

Marty Allison

The LL-HA21-4 is one of those components that experienced integrators order proactively rather than reactively. The 0-inch offset spec is what I want to highlight first — in a fully loaded rack with patch panels, managed switches, and a multi-channel NVR all competing for front-to-back depth, a flush-mount lace strip that doesn't steal any usable depth from the cable channel is the only rational choice. I've seen installs where someone used protruding plastic lace clips and then couldn't close the front door on a 4-post enclosure without pinching cable.

Technical Highlights:

• Steel Angle Profile: The angle (L-bracket) geometry at a 22.07-inch span means cable bundles are positively retained laterally — not just resting on a flat bar. Under a dense IP camera cable plant with 24+ Cat6 runs per rack, that retention lip keeps bundles from riding up over the strip under their own weight.
• 4-Pack Format: Ordering four strips per SKU is the right unit for practical deployments. A single 12U-to-24U rack section typically needs 4–8 lace points for proper horizontal bundle management — one order of LL-HA21-4 covers half a standard rack section at a spacing that maintains Cat6 bend radius compliance.
• Lever Lock Interface: Tool-free demount means a field technician can reposition a lace strip during a recabling event without hunting for hardware — a genuine time saver in live production racks where downtime is measured in minutes.

Deployment Considerations:

• Confirm your Middle Atlantic rack enclosure model supports the Lever Lock horizontal accessory rail before ordering — not every Middle Atlantic frame shares the same accessory mounting interface, and the LL-HA21-4 is not a universal fit across all rack configurations.
• The 0-inch offset is correct for standard rack builds, but if your cable plant requires a forward-projected lace point to clear a deep switch face or cable trough, a different offset variant in the Middle Atlantic Lever Lock line may be needed — verify clearance requirements before committing to a quantity order.

For a physical security rack build — say, a head-end enclosure with an NVR stack, PoE switch tier, and 48-port patch panel — the LL-HA21-4 installed at every third rack unit gives you a fully dressed cable plant that survives repeated access during camera adds and system expansions without turning into an unmanageable tangle.