LT-4000 Universal Flush Lightweight Aluminum Access Door

The LT-4000 is a flush aluminum access door for walls and ceilings. It gives contractors and building owners a clean, low-profile opening to plumbing, electrical, or mechanical components in applications where corrosion or moisture resistance is crucial.

Its mitered aluminum frame sits flush with the edge, with a 1-5/16" aluminum extrusion flange and a 1-1/2" deep mounting frame. A 3/4" Type 3 Expanded Polystyrene (EPS) foil-lined insulation panel lines the door, and a closed cell neoprene gasket seals the perimeter on all four sides.

The result is a door that withstands exterior and moisture-prone interior environments, opens cleanly without obstruction, and installs across a wide range of standard wall and ceiling openings.

Why Do Contractors Choose LT-4000 Universal Flush Lightweight Aluminum Access Door?

• All-aluminum construction for corrosion-prone environments: The .064 aluminum door and .080 aluminum frame make the LT-4000 suitable for exterior applications and interior areas where moisture or corrosion is a concern.
• Insulated door panel: A 3/4" Type 3 EPS foil-lined insulation panel with a 3.18 R-value lines the door panel, reducing thermal transfer at the access point.
• Perimeter gasketing: A 1/8" x 3/8" closed cell neoprene gasket runs along all four sides between the door and frame.
• Architecturally clean frame: The mitered aluminum extrusion frame sits flush to the edge and provides a finished appearance without surface-mounted hardware on the front face.
• Hinge matched to door width: Doors 24" wide or less use a concealed pin hinge. Doors wider than 24" use a continuous aluminum piano hinge with an exposed knuckle that opens to 180 degrees, giving technicians unobstructed access to the space behind the door.

Ready to order? Request a quote for the LT-4000 to confirm sizing, lock options, and production lead times based on your project timelines.

Key Product Specifications

• Application: Walls and ceilings
• Door: .064 aluminum
• Frame: .080 aluminum, mitered extrusion flange, 1-5/16" flange width, 1-1/2" deep mounting frame
• Hinge: Concealed pin hinge (doors 24" wide or less); continuous aluminum piano hinge with exposed knuckle, opens to 180° (doors wider than 24")
• Insulation: 3/4" Type 3 Expanded Polystyrene (EPS) Foil Lined, R-value 3.18
• Gasket: 1/8" x 3/8" closed cell neoprene, four sides
• Standard latch: Slotted screwdriver cam latch (quantity varies by door size)
• Optional latch/lock: Cylinder lock and key
• Finish: Mill finish
• Wall opening: Door size plus 5/8" (16mm) on each dimension
• Standard sizes: 8" x 8" to 72" x 48"

Need a size that isn't on the standard list? Request a custom quote to get the LT-4000 manufactured to your exact dimensions.

What Comes Standard and What Can Be Configured?

Every LT-4000 ships with the following as standard:

• .064 aluminum door panel with 3/4" Type 3 EPS foil-lined insulation
• .080 mitered aluminum extrusion frame, mill finish
• Concealed pin hinge (doors 24" wide or less) or continuous aluminum piano hinge with exposed knuckle opening to 180° (doors wider than 24")
• Slotted screwdriver cam latch (quantity determined by door size)
• 1/8" x 3/8" closed cell neoprene gasket, four sides

The following must be specified at the time of order and is not included as standard:

• Cylinder lock and key

What Should You Confirm Before Ordering LT-4000?

• Wall opening size: The rough opening must be the nominal door size plus 5/8" (16mm) on each dimension. For example, a 24" x 36" door requires a 24-5/8" x 36-5/8" wall opening.
• Hinge type: Doors 24" wide or less ship with a concealed pin hinge. Doors wider than 24" ship with an exposed aluminum piano hinge. Confirm your door width before ordering so you know which hinge your installation will receive.
• Latch count: One latch is standard for doors up to 24" x 24". Two latches are standard for doors from 24" x 36" to 36" x 48". Four latches are standard for doors 48" x 48" and larger. Confirm the size you need so the right latch configuration ships with your order.
• Lock option: The standard latch requires a flathead screwdriver to operate. If you need a keyed option, specify the cylinder lock and key at the time of order.
• Custom size: If your opening doesn't match a standard size, custom sizes are available. Contact our team before placing your order to confirm feasibility and lead time.
• Production lead time: Lead time depends on your size and configuration. Request a quote to confirm production and ship dates.

Installation Notes

• Cut the wall or ceiling opening to the nominal door size plus 5/8" (16mm) on each dimension before installation.
• The slotted screwdriver cam latch requires a flathead screwdriver to operate. Doors over 24" wide ship with two latches; doors 48" x 48" and larger ship with four.
• The neoprene gasket runs along all four sides of the perimeter between the door and frame. No additional sealing is required at the gasket joint.

Who Installs LT-4000 and Where Is It Used?

The LT-4000 is installed by contractors, facility managers, and building owners who need a flush aluminum access door in walls or ceilings, particularly in environments where steel panels would corrode or where moisture exposure is a concern.

Common applications include:

• Exterior building envelopes: The all-aluminum construction handles outdoor exposure without corrosion, making the LT-4000 an ideal choice for exterior wall access points.
• Commercial and institutional buildings: Flush access to mechanical, electrical, and plumbing components in offices, schools, government buildings, and healthcare facilities.
• Industrial facilities: Repeatable access to equipment in environments with humidity, chemical exposure, or washdown requirements.
• Multifamily and residential buildings: Concealed access to plumbing and electrical components in finished walls and ceilings.
• Renovation and retrofit projects: Added access to existing walls or ceilings across a wide range of opening sizes.

Frequently Asked Questions

1. How do I calculate the wall opening for LT-4000?

Add 5/8" (16mm) to each dimension of the nominal door size. A 24" x 36" door, for example, needs a 24-5/8" x 36-5/8" wall opening. This applies to all standard sizes.

2. Does the hinge type change depending on door size?

Yes. Doors 24" wide or less ship with a concealed pin hinge. Doors wider than 24" ship with a continuous aluminum piano hinge with an exposed knuckle that opens to 180 degrees.

3. How many latches does LT-4000 ship with?

It depends on the door size. Doors up to 24" x 24" ship with one slotted screwdriver cam latch. Doors from 24" x 36" through 36" x 48" ship with two. Doors 48" x 48" and larger ship with four.

4. Can I get LT-4000 with a keyed lock instead of a screwdriver latch?

Yes. The cylinder lock and key is available as an optional upgrade. Specify it at the time of order.

5. Is LT-4000 suitable for exterior applications?

Yes. The all-aluminum construction is suited for exterior applications and interior environments where corrosion or moisture is a concern.

6. Is LT-4000 available in fire-rated configurations?

No. The LT-4000 is a non-rated access door. If you need a fire-rated panel, check our fire-rated access products for suitable options.

Why Buy the LT-4000 From Acudor Access Panels?

Acudor Access Panels is an authorized Acudor distributor. Every LT-4000 we supply is manufactured to Acudor's published specifications, and our team can confirm sizing, latch configurations, and production lead times for your exact order before you commit.

Have any questions? Contact our team or call +1-888-327-5471 to confirm specifications, compare sizes, and get guidance from our specialists.