4×4 in. x 11 ft. HD Square Post (.125 Thk) – Black + Cap

$34.66 – $260.00

Aluglobus Heavy-Duty Aluminum Post

4″ × 4″ heavy-duty square aluminum post with an 11 ft length and .125″ wall
thickness. Manufactured from 6063-T6 aluminum for increased strength and
structural rigidity, with a durable black exterior finish and matching cap
for a clean completed installation.

Post Size
4″ × 4″

Length
11 ft

Wall Thickness
.125″

Color
Black

Material
6063-T6 Aluminum

Classification
Heavy-Duty Square Post

Included
11 ft Post + Matching 4″ Cap

Strength
Reinforced .125″ Wall Construction

Corrosion Resistance
Weather-Resistant Aluminum Construction

Applications
Fence, Gate, Pergola & Structural Support

Heavy-duty .125″ profile:
designed for projects requiring greater post rigidity and load capacity.
Confirm footing depth, mounting method, loads, and project-specific
structural requirements before installation.

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SKU: 26571-1 Categories: Aluminum Fences - DIY Fence Kit Post, Posts Tags: price2024, shop

Description

Product Description

4″ Square Post · 11 ft · HD .125 · Black + Cap

A true heavy-wall 4×4 aluminum post for large support conditions.

The 4×4 in. x 11 ft. HD Square Post (.125 Thk) – Black + Cap combines a 4-inch square footprint, 11-foot supplied length, .125-inch wall and 6063-T6 aluminum in one of the heavier square-post configurations in the Aluglobus profile family. It is built for projects where both post size and wall thickness need to step beyond the 3-inch .090 HD and 3.15-inch .080 LD classes.

Choose post & cap options ↑ View specifications ↓

11 ft supplied length

6063-T6 · 4″ square · 11 ft · .125 HD

Profile4″ × 4″

Length11 ft

Wall.125″

Alloy6063-T6

FinishBlack + matching cap

The structural jump is real

4 inches outside. .125 inches through the wall. That is a different support class.

This post is not simply a larger-looking alternative. Aluglobus publishes the 4×4 × 11 ft black post with a .125-inch reinforced wall and 6063-T6 aluminum for demanding applications. The larger cross section and thicker wall should be treated as a distinct structural choice, not as an interchangeable substitute for smaller post families.

4″ × 4″ square footprintA visibly larger support profile for substantial fence, gate, pergola, railing and structural conditions.

.125″ reinforced wallA heavier wall than the .090 HD and .080 LD families, intended for higher-demand support conditions.

6063-T6 aluminumPublished for this 4×4 post, combining architectural aluminum construction with a heavy-wall profile.

.125″ wall
HD class

Conceptual cross-section · not to scale

Why 11 feet matters

Long stock and a heavy wall solve two different project problems at the same time.

The .125 wall defines the structural class. The 11-foot extrusion gives the installer additional material for approved embedment, taller finished conditions, grade changes and field cutting. Neither dimension should be treated as one standard footing or finished-height rule.

More total stock

Eleven feet gives additional material for projects that cannot be resolved within a standard 8-foot post.

Heavy-wall support

The .125 wall provides a larger structural step than the .090 HD and .080 LD post families.

Grade flexibility

Longer stock creates more room for field cuts where finished elevations change across the property.

Large-system planning

The 4-inch footprint works naturally with visually substantial fence, gate, pergola and structural assemblies.

Important: 11 ft is the supplied extrusion length. Final height, embedment, base design and spacing must be based on the actual loads, site and local requirements.

Post + cap configuration

Finish the 4-inch black HD support with the matching cap specified for the grouped product.

The product name identifies this configuration as the 4×4 × 11 ft .125 HD black post with cap. The public product index confirms the post specification but does not expose a separate cap style, so the cap is represented here only as the matching 4-inch black cap component.

Structural profile

4″ × 4″ × 11 ft · .125 HD · 6063-T6

Heavy-wall black aluminum post for demanding fence, gate, pergola, railing and structural applications.

Matching finishing component

4″ Black Post Cap

Matching cap for the 4-inch square post configuration, used to close the exposed top and complete the finished support.

Quantity planning: count structural post positions from the actual layout, then confirm how many exposed 4-inch post tops require caps. Gate hinge posts, structural corners and other high-load positions should be reviewed separately.

Choose product options ↑

Technical specifications

The important published values are unusually clear on this 4×4 post.

Aluglobus publishes the 4×4 × 11 ft black HD post as 6063-T6 aluminum with a reinforced .125 wall, corrosion and weather resistance, a black coated finish, and applications ranging from fences and gates to pergolas, railings and structural systems.

Specification boundary: the product page does not publish an allowable load table, engineered wind rating, universal post spacing or one fixed footing depth. Those remain project-specific even with a .125 Heavy Duty post.

Product: 4×4 in. x 11 ft. HD Square Post (.125 Thk) – Black + Cap
Cross section: 4″ × 4″ square
Supplied length: 11 ft
Wall thickness: .125″
Class: Heavy Duty
Material: 6063-T6 aluminum
Finish: Black coated exterior finish
Cap: Matching 4″ black post cap component
Fence applications: Residential, commercial and higher-demand aluminum fence systems after load verification
Gate applications: Compatible structural and hinge-post conditions after gate loads and foundation are verified
Other applications: Pergolas, railings and structural systems where the post matches the approved design
Engineering: Confirm loads, wind, spacing, footing, base and connection details for the project

Compare the post families correctly

Outside size and wall thickness both move upward in the 4×4 .125 HD post.

The 4×4 profile is not just one more length option. It is a heavier support category with a broader outside dimension and thicker published wall than the smaller post families used elsewhere in the Aluglobus system.

Decision	3.15″ .080 LD	3″ .090 HD	4″ .125 HD
Outside size	3.15″ square	3″ square	4″ square
Wall	.080″	.090″	.125″
Structural direction	Light Duty	Heavy Duty	Heavy-wall Heavy Duty
Typical reason to move up	Large-looking support where LD capacity is sufficient	More wall and HD support without a 4-inch footprint	Larger structural section for demanding fence, gate or structural conditions
Buying question	Is LD enough?	Does .090 HD meet the design?	Does the project justify the 4×4 footprint and .125 wall?

Applications

The published application list goes well beyond a standard residential fence line.

Aluglobus positions the 4×4 × 11 ft HD post for higher-load applications across fencing, gates, pergolas, railings and structural systems. Each use still needs the correct connections and foundation.

Fence

Large privacy & perimeter systems

A strong support direction for substantial fence panels where the 4-inch footprint and .125 wall suit the verified design.

Gate

Heavy hinge-post conditions

The 4×4 profile can be considered where gate size and hinge leverage justify a larger support, subject to gate and foundation calculations.

Pergola

Architectural support posts

The indexed product includes pergolas among its applications. Use only where the complete structural design is engineered around this profile.

Railing

Large railing support conditions

Published as a possible railing and structural-system post, with connections and code requirements determined by the actual project.

Commercial

Higher-demand perimeter support

Useful where larger post geometry and a .125 wall are appropriate for commercial boundary or security conditions.

Architectural

Visible structural rhythm

The 4-inch square footprint creates a bold vertical line that can be intentionally integrated into modern exterior design.

System context

A 4×4 .125 post should be designed as part of the complete load path.

These Aluglobus system images show the wider fence and gate context. They illustrate layout, proportion and finish rather than claiming that every pictured installation uses this exact 4×4 SKU.

Aluglobus aluminum gate and fence system with structural support posts — Large posts belong in the complete fence or gate load path

Aluglobus aluminum fence post alignment and system installation — Eleven-foot stock makes elevation and alignment planning important

Aluglobus black powder coated aluminum system detail — Black aluminum keeps structural components visually consistent

Aluglobus aluminum fence and gate construction detail — Profile, wall, connection and foundation should be specified together

Black coated aluminum

The finish adds weather protection while keeping the heavy support visually clean.

Aluglobus describes the 4×4 post with a black coated finish intended to improve both appearance and exterior protection. The aluminum substrate resists iron-oxide rust, while the black finish keeps the larger structural profile compatible with modern fence, gate and architectural systems.

6063-T6 aluminumThe published aluminum alloy combines architectural appearance, corrosion resistance and a favorable strength-to-weight ratio.

Black exterior coatingThe indexed product specifically publishes a black coated finish for weather exposure and a contemporary appearance.

Low-maintenance materialNo wood-style painting or sealing cycle is required as part of normal post maintenance.

Confirm project finish requirementsIf a specification calls for a particular AAMA level, powder manufacturer or gloss, verify that exact coating requirement before submittal.

4″ square · 11 ft · .125 HD · 6063-T6 · black

Installation planning

A heavier post does not eliminate the need for a properly designed base and connection.

Aluglobus’ installation guidance calls for layout planning, holes deep enough for the required load and local conditions, plumb alignment, concrete support, full cure before loading, and a final alignment check. Those principles are preserved without inventing one footing depth for every project.

Before installation: verify the post role, fence or gate loads, finished height, soil, wind exposure, spacing, footing or base design, connection hardware and local requirements.

Confirm that 4×4 .125 HD is the right class

Use the actual loads and system design to justify the larger profile rather than selecting by appearance alone.

Map every structural post location

Separate line posts, corners, ends, gate hinge posts and other high-load positions before quantities are finalized.

Establish finished elevations

Use a laser, level or string line to determine how much of the 11-foot extrusion is required at each location.

Design the footing or base

Size the support from the real fence, gate, pergola, railing or structural loads together with the site conditions.

Set the post plumb

Check both directions before concrete or structural fasteners are finalized because long heavy-wall posts magnify alignment errors.

Allow concrete to cure

Do not load the post with panels, gate hardware or structural components until the supporting concrete has reached the required cure.

Attach the system components

Use compatible connections and hardware for the specific fence, gate, pergola, railing or structural assembly.

Install the matching cap

After final cutting and alignment, clean the exposed 4-inch post top and install the matching black cap component.

Gate-support decision

The 4×4 footprint is valuable for gate support, but the hinge load still controls the design.

The indexed product specifically includes gates among its applications. For gate work, evaluate the 4×4 .125 post as one part of the complete hinge, foundation and automation system rather than assuming the words Heavy Duty provide a universal gate rating.

Gate leverage mattersLeaf width and weight create bending and torsional demand that a stationary fence panel does not apply.

Privacy area mattersSolid or near-solid gate leaves can create large wind loads even when the aluminum frame itself is relatively light.

Automation mattersMotorized gates add dynamic forces and may require reinforced connections, different hinges, foundation changes or engineering beyond the post itself.

Maintenance

Heavy-wall aluminum is built for long service with simple routine care.

The indexed product emphasizes corrosion resistance, weather resistance and low maintenance. Routine care should focus on cleaning the coated surface and inspecting the complete fence, gate or structural system rather than repainting or sealing the aluminum post.

Keep the finish clean

Rinse dirt, salt and environmental residue with water and a mild cleaner when needed.

No sealing cycle

The aluminum post does not require wood-style staining or sealing as part of normal maintenance.

Protect field cuts

Use suitable non-ferrous cutting tools when trimming is required and follow the approved finish-repair method for exposed cut areas.

Inspect the full system

For gates and structural assemblies, periodically check alignment, fasteners, hinges, bases and foundations.

Frequently asked questions

Know exactly what the 4″ × 4″ × 11 ft .125 HD Black + Cap configuration is before ordering it.

The defining specifications are the true 4-inch square profile, .125 wall, 11-foot stock length, 6063-T6 alloy and black finish.

What are the exact post dimensions?

The post has a true 4-inch by 4-inch square profile and is supplied in an 11-foot length.

What is the wall thickness?

Aluglobus publishes a reinforced .125-inch wall for the 4×4 × 11 ft Heavy Duty black post.

What aluminum alloy is used?

The indexed product explicitly identifies 6063-T6 aluminum.

What cap should be used?

This configuration is named as the black post plus cap version. Use the matching cap sized for the true 4-inch square post. The public index does not identify a separate cap style, so confirm the exact cap selection in the product options.

Can this post be used for a gate?

Yes, gates are among the published applications. Actual suitability depends on leaf width, weight, wind area, hinge geometry, automation and foundation design.

Can it be used for pergolas or railings?

The indexed product includes pergolas, railings and structural systems among its applications. Those uses require project-specific structural design and connections.

Is the finished structure automatically 11 feet high?

No. Eleven feet is supplied stock length. Final above-grade height depends on mounting, embedment, structural connections and field cuts.

Does a .125 HD post use one standard footing depth?

No. Footing depth and size depend on the structure, height, wind exposure, soil, spacing, gate loads and local structural requirements.

How does this compare with the 3-inch .090 HD post?

The 4×4 post has both a larger outside cross section and a thicker .125 wall. The 3-inch HD family uses a smaller profile and .090 wall, so the two should be treated as different structural classes.

What maintenance does the black aluminum post need?

Routine care is mainly mild cleaning to remove dirt and environmental residue. Aluminum does not require a wood-style painting or sealing cycle, while gates and structural assemblies should still be inspected periodically.

Factory-direct heavy-wall aluminum posts

Move to 4×4 .125 HD when the project needs a genuinely larger support class.

Select the 4″ × 4″ × 11 ft .125 HD 6063-T6 black post and matching cap from the product options, or send Aluglobus the fence, gate, pergola or structural layout when you need help confirming the support condition and quantity.

Choose product options ↑Request project support

Aluglobus Aluminum Systems · 4×4 heavy-wall aluminum posts · Fence systems · Gate systems · Nationwide supply

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"I couldn't be happier with the fence. From the moment it went up, it completely transformed my backyard. The sleek design without visible posts gives it such a modern, high-end look. It's like having a piece of art around my home. I also love that it's fire-resistant, which gives me peace of mind living in this area. Definitely worth every penny!"

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Valley One Gates & Access

"We use Aluglobus 100% with every fence/gate job we have. As a contractor I can say they are working very hard and their product is the highest quality I can find and the best price. We're very happy working with them! Our experience working with them is always top notch."

22 July 2025

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