Posted On: 2025-06-04 07:44:05

What is a Slotted Angle Racks? What Are It's Types?

Slotted Angle Racks are modular shelving systems made from cold-formed mild steel angles that have slots punched at regular intervals. These slots allow easy assembly and customization using nuts and bolts. The Shelves are made for the custom requirement. The Nuts and bolts of a Slotted Angle Racks are and can be adjusted for height adjustment of a compartment. Industrial warehouse and office use are commonly seen for the rack.

Key features:

Highly customizable (height, width, levels).
Cost-effective for storage solutions.
Easy to assemble and disassemble.
Used in warehouses, offices, homes, shops, and industrial storage.
Can store light to moderately heavy items, depending on design and gauge.

Best Slotted Angle Rack Manufacturers

While many companies manufacture slotted angle racks, the best Slotted angle racks manufacturers in India typically offer:

High-quality raw materials (Tata Mild-Steel HRC sheets).
Durable powder coating for corrosion resistance.
Custom made based on client requirements.
ISO-certified production processes.
Prompt delivery and good customer support.

Some leading names in India:

Guru Kirpa Steel Products
GKSP Racking Private Limited
Mahabali Steel Products
Racks Mart India

Types of Slotted Angle Racks

1. Open Type Racks

No side or back Sheets.
Most cost-effective and lightweight.
Suitable for light to medium loads.
Easy to access items from all sides.

2. Closed Type Racks

Comes with back and side sheets.
Protects items from falling or dust.
Looks more organized.
Can hold medium to heavy loads.

▪️ Back & Sides Closed Type Racks

Both back and side Sheets are closed.
Gives a more box-like feel.
Adds structural strength.
Suitable for warehouses storing delicate or boxed items.

3. Partition Type Racks

Each shelf is divided vertically.
Creates individual compartments within a shelf.
Ideal for storing files, documents, small tools, and hardware.

4. Pigeon Hole Type Racks

Similar to partition type but with many small pigeon-hole boxes.
Used for tool storage, electronic parts, spare parts.
Offers neat categorization of small items.

5. Section Panel Type Racks

Uses heavy-duty section panels.
These are reinforced panels, typically thicker and supported with stiffeners.
Designed for higher load capacity.
Considered the strongest type among all.

Weight Capacity Derivation

Weight capacity of slotted angle racks depends on multiple factors:

1. Thickness of Angle / Gauge of Steel

Thicker angles = higher gauge = more strength.
Common gauges: 14G.

10G (~3 mm thick) = Industrial use.
12G (~2.5 mm thick) = heavy-duty.
14G (~2 mm thick) = Medium heavy-duty.

Rule: Heavier the gauge` more the weight capacity.

2. Section Panel Strength

Section panel racks are the best for heavy-duty.
Reinforced for maximum weight distribution.
Best used for loads.

3. Use of Shelf Stiffeners

Shelf stiffeners are horizontal reinforcements added under each shelf.
Prevent bending and sagging under heavy loads.
Improves load-bearing ability significantly.

Raw Materials & Processing

1. Tata HRC Sheets (Hot Rolled Coils)

HRC sheets from Tata Steel are industry standard for durability.
Excellent tensile strength and formability.
Used for making both slotted angles and shelf panels.

2. Powder Coating

A dry finishing process where powder is sprayed electrostatically and then baked under heat.
Benefits:

Corrosion resistance
Enhanced appearance
Scratch-resistant surface

Commonly used in industrial grey, blue, ivory, and orange colors.

3. Asian Powder Coat

Asian Paints manufactures industrial-grade powder coats.

Manufacturing Process (Step-by-Step)

Slotted angle racks with shelves are manufactured through a systematic process that combines metal fabrication, precision engineering, and assembly techniques.

1) Raw Material Preparation

The manufacturing begins with high-quality cold-rolled steel strips, typically ranging from 1mm to 3mm in thickness depending on the load requirements. These steel coils are first cleaned and prepared for processing.

2) Slotted Angle Formation

The core component - the slotted angle itself - is created using roll forming machines. The flat steel strip is fed through a series of rollers that gradually bend it into the characteristic L-shaped angle profile, typically 90 degrees. During this process, slots are punched at regular intervals using punching machines. These slots are precisely positioned to ensure proper alignment during assembly.

3) Cutting and Sizing

Once the continuous slotted angle is formed, it's cut to standard lengths using pneumatic or hydraulic cutting machines. Common lengths include 6 feet, 8 feet, 10 feet, and 12 feet, though custom lengths can be produced based on requirements.

4) Surface Treatment

The cut pieces undergo surface treatment processes. This typically involves degreasing, phosphating, and powder coating or galvanizing. Powder coating provides color options and additional corrosion resistance, while galvanizing offers superior rust protection for industrial environments.

5) Shelf Manufacturing

Shelves are manufactured separately using sheet metal fabrication. Sheets are cut to size, then formed with flanged edges for strength and rigidity. They receive the same surface treatment as the angles.

6) Hardware Production

Nuts, bolts, and connecting hardware are either procured from specialized manufacturer. These components are typically zinc-plated for corrosion resistance.

7) Quality Control and Assembly

Each component undergoes dimensional checks and load testing. Sample assemblies are tested for weight-bearing capacity and structural integrity. The manufacturing process includes strict quality control measures to ensure slot alignment, coating thickness, and dimensional accuracy.

8) Packaging and Distribution

Finally, the components are sorted, counted, and packaged in sets with appropriate hardware and assembly instructions. The modular nature of slotted angle systems allows for efficient packaging and shipping.

This manufacturing process enables the production of versatile, adjustable storage solutions that can be easily assembled and reconfigured as needed, making slotted angle racks popular in warehouses, workshops, and retail environments.

Blog Details