660 lbs Heavy Duty Manual Scissor Attic Ladder for 24" O.C. Truss Retrofit

Product Specifications

Parameter	Specification
Product Model	ZJ-AL-225
Product Type	Heavy Duty Manual Scissor Attic Ladder
Material Options	Aluminum-Magnesium Alloy / High-Strength Carbon Steel
Rated Load Capacity	660 lbs (300 kg)
Standard Rough Opening	22.5" x 35.5" (570 x 900 mm)
Truss Compatibility	Designed for 24" On-Center (O.C.) Roof Truss Applications
Standard Ceiling Height	7.5 ft – 10.5 ft (2.3 m – 3.2 m)
Maximum Available Height	Up to 12 ft (3.6 m), depending on configuration
Tread Width	15.7" (400 mm)
Tread Depth	5.5" (140 mm)
Tread Surface	Corrugated Anti-Slip Surface
Hatch Insulation	High-Density EPS Insulation Core
Hatch Sealing	EPDM Weatherstripping
Operation Type	Manual Folding Operation
Opening Assistance	Dual Gas Spring Assistance
Customization	Material, Opening Dimensions, Ceiling Height and Product Configuration

Heavy Duty Manual Scissor Attic Ladder for Residential Attic Access

The ZJ-AL-225 Heavy Duty Manual Scissor Attic Ladder is designed for residential attic access, roof truss retrofit projects and overhead storage applications. Its compact scissor folding structure provides convenient access to attic spaces while keeping the ladder neatly stored above the ceiling when not in use.

With a rated load capacity of 660 lbs (300 kg), wide anti-slip treads and reinforced folding components, this model is developed for customers looking for a heavy-duty manual attic ladder with a practical installation design.

One of its main advantages is its 22.5-inch frame design for compatible 24-inch on-center roof truss layouts. When the existing framing dimensions meet the installation requirements, the ladder can be fitted between structural members without cutting the original trusses.

Manufactured by Xinxiang Zhuojin Machinery Co., Ltd., the ZJ-AL-225 supports different material options, ceiling heights and dimensional customization for building material distributors, importers and renovation contractors.

Three Key Advantages of Our Heavy Duty Attic Ladder

1. 660 lbs Heavy Duty Load Capacity

<Add Product Image: Close-up of the reinforced scissor linkage and ladder structure>

Designed for applications requiring higher load capacity, the ZJ-AL-225 features a reinforced scissor-style folding structure with a rated load capacity of 660 lbs (300 kg).

The interconnected folding arms provide structural support when the ladder is fully extended, helping maintain stability during normal climbing and attic access.

Key features:

• Rated load capacity of 660 lbs (300 kg).

• Reinforced scissor-style structural components.

• Aluminum-magnesium alloy or carbon steel material options.

• Designed for regular residential attic access.

The combination of structural reinforcement and folding linkage design provides a practical solution for customers looking for heavy-duty retractable loft stairs.

2. Designed for 24" O.C. Roof Truss Installation

<Add Product Image: Installation diagram showing the ladder positioned between two roof trusses>

The ZJ-AL-225 features a 22.5-inch wide frame design developed for compatible 24-inch on-center roof truss layouts.

This configuration allows the ladder to be installed between existing roof trusses without cutting structural members, provided the actual clearance and framing conditions meet the installation requirements.

For retrofit applications, additional transverse framing supports may be required at the ends of the opening to provide a suitable mounting structure.

Installation advantages:

• Designed around standard 24" O.C. truss spacing.

• Suitable for selected existing roof framing layouts.

• Helps avoid cutting original structural trusses.

• Practical for residential attic access upgrades.

• Custom dimensions available for different project requirements.

Before ordering, buyers should confirm the actual truss spacing, clear opening and mounting dimensions to ensure compatibility.

3. Manual Scissor Folding Design with Gas Spring Assistance

<Add Product Image: Fully extended ladder and folded ceiling storage position>

Unlike conventional pull-down attic ladders with long folding sections, the ZJ-AL-225 uses a compact scissor-style folding mechanism.

The ladder is operated manually, while dual gas springs assist the opening and closing movement.

When folded, the ladder is stored above the ceiling opening, helping save floor space and maintain a clean interior environment.

Key features:

• Manual opening and closing operation.

• Dual gas spring assistance.

• Compact scissor-style folding structure.

• Space-saving ceiling storage design.

• No electrical power supply required.

This mechanism is suitable for residential users who prefer a manually operated attic ladder with assisted movement.

Additional Product Features

Wide Anti-Slip Treads

<Add Product Image: Close-up of the 400 x 140 mm ladder tread>

Each tread measures approximately 400 mm wide and 140 mm deep, providing a larger foot-contact area for climbing.

The corrugated tread surface helps improve grip during use and provides a more comfortable stepping area than conventional narrow ladder rungs.

Insulated Attic Hatch

<Add Product Image: Close-up of the insulated hatch panel>

The attic hatch incorporates a high-density EPS insulation core and EPDM perimeter weatherstripping.

These components help reduce air leakage through the ceiling opening and improve thermal insulation performance.

This feature is particularly useful for residential buildings where attic insulation and indoor temperature control are important.

Available Material and Customization Options

Different building projects and target markets may require different ladder materials, opening dimensions and ceiling heights.

As an attic ladder manufacturer, Xinxiang Zhuojin Machinery Co., Ltd. provides customization options for wholesale and OEM customers.

Customization Item	Available Options
Ladder Material	Aluminum-Magnesium Alloy / Carbon Steel
Rough Opening	Standard and Custom Dimensions
Ceiling Height	Standard 7.5–10.5 ft / Configurations up to 12 ft
Ladder Structure	Manual Scissor Folding Design
Load Capacity	Model-Specific Configuration
Branding	OEM Logo and Packaging
Order Type	Wholesale, OEM and Project Orders

For custom orders, please provide your required ceiling height, rough opening dimensions, material preference and target load capacity.

Our team can help confirm the suitable product configuration before production.

Manufacturer & Factory Production

Xinxiang Zhuojin Machinery Co., Ltd. specializes in manufacturing attic access ladders and industrial ladders for international markets.

Our main product range includes:

• Manual Scissor Attic Ladders

• Electric Retractable Attic Ladders

• Wall-Mounted Folding Ladders

• Aluminum Industrial Ladders

• Fiberglass Industrial Ladders

We support distributors, building material wholesalers, importers and project contractors with factory-direct manufacturing and OEM customization.

Our Factory Services:

• Product dimension customization.

• Material and configuration selection.

• OEM branding and packaging.

• Production inspection and load testing.

• Export packaging for international shipments.

• Technical support for product selection and installation requirements.

With in-house manufacturing and assembly capabilities, we can communicate directly with buyers about product specifications, production requirements and customized orders.

Request a Factory-Direct Quote

Are you sourcing a heavy-duty manual attic ladder for your building material distribution business or construction projects?

The ZJ-AL-225 offers a combination of 660 lbs rated load capacity, 24-inch O.C. truss compatibility and a compact manual scissor folding mechanism.

Contact Xinxiang Zhuojin Machinery Co., Ltd. to discuss your requirements.

Send us the following information:

• Required ceiling height.

• Rough opening dimensions.

• Preferred ladder material.

• Target load capacity.

• Estimated order quantity.

Get product specifications, customization details and a factory-direct quotation for your project.

Frequently Asked Questions

Q1: Can this heavy duty attic ladder fit between 24-inch on-center roof trusses?

The ZJ-AL-225 is designed for compatible 24-inch on-center roof truss applications. Its 22.5-inch frame design allows installation between existing structural members when the actual clearance and mounting conditions meet the required dimensions.

Additional cross supports may be needed at the ends of the opening. Always verify the actual framing dimensions and follow the installation instructions before installation.

Q2: What is the load capacity of the ZJ-AL-225 manual attic ladder?

The rated load capacity is 660 lbs (300 kg). The reinforced scissor-style folding structure is designed to provide support during normal attic access.

The total load includes the user and any tools or materials being carried. Users should not exceed the rated load limit.

Q3: Is this a manual or electric retractable attic ladder?

This is a manually operated scissor attic ladder. It uses a dual gas spring assistance system to help control the opening and closing movement.

Unlike electric attic stairs, it does not require a motor, electrical wiring or power supply.

Q4: What ceiling heights are available?

The standard configuration accommodates ceiling heights from approximately 7.5 ft to 10.5 ft. Extended configurations up to 12 ft are available depending on the ladder design.

Please provide your exact floor-to-ceiling height so we can confirm the suitable configuration.

Q5: What is the rough opening size for this attic ladder?

The standard rough opening is 22.5 x 35.5 inches (570 x 900 mm).

Custom opening dimensions may be available for different residential construction and retrofit projects. Please confirm the required opening dimensions before ordering.

Q6: What is the difference between aluminum-magnesium alloy and carbon steel attic ladders?

Both materials can be used for heavy-duty attic ladder configurations.

Aluminum-magnesium alloy is generally selected when a lighter ladder structure is preferred, while carbon steel is an alternative for customers who prefer a steel construction.

The final weight and load performance depend on the actual product configuration.

Q7: Does the attic hatch provide insulation?

Yes. The standard hatch design uses a high-density EPS insulation core and EPDM perimeter weatherstripping.

These components help reduce air leakage through the attic access opening and improve the insulation performance of the hatch.

Q8: Do you accept OEM and wholesale orders?

Yes. We are a direct manufacturer and support wholesale, OEM and project-based orders.

We can discuss customized dimensions, materials, product specifications, branding and export packaging according to your requirements.