steel shelving cabinets (adjustable type) -Specification

IS 3312: Scope & Key Specifications for Steel Shelving Cabinets

Scope (Clause 3.1)

• Covers fabrication and dimensions of steel shelving cabinets.
• Applies to small and large sizes with specified overall dimensions (excluding pedestal height).

Key Tables:

Note: Height excludes pedestal height.

Lockers Inside Dimensions (Clause 4.10):

Additional Specifications Referenced:

• Filler rods and wires for gas welding.
• Covered electrodes for metal arc welding.
• Resistance spot-welding electrodes.
• Hot and cold rolled carbon steel sheets.
• Structural steel ordinary quality.
• Slotted countersunk head screws.

Summary Diagram: Steel Shelving Cabinet Dimensions

graph TD
    A[Steel Shelving Cabinet] --> B[Small Size]
    A --> C[Large Size]
    B --> H1[Height: 1155 mm]
    B --> W1[Width: 760 mm]
    B --> D1[Depth: 430 mm]
    C --> H2[Height: 1855 mm]
    C --> W2[Width: 910 mm]
    C --> D2[Depth: 480 mm]

This scope defines cabinet sizes and fabrication standards ensuring uniformity and quality in steel shelving systems.

IS 3312: Materials - Key Specifications & Tables

1. Material Grades:

• Mild Steel Rounds and Flats:
  Conform to Grade Fe 310-0 (St 320) as per IS 1977:1975.

2. Sheet Metal Components (Clause 8.1):

• Use hot rolled or cold rolled carbon steel sheets conforming to:
  • Hot Rolled: IS standard (3rd revision)
  • Cold Rolled: IS standard (2nd revision)

3. Welding Materials:

• Filler rods and wires: As per IS specifications for gas welding (2nd revision).
• Covered electrodes: For metal arc welding of structural steel sheets (4th revision).
• Resistance spot-welding electrodes: IS specified.

4. Shelving Cabinet Dimensions (Clause 3.1, Table 1):

*Height excludes pedestal height.

Summary:

• Use Fe 310-0 steel for rounds/flats.
• Sheet metal must comply with IS hot/cold rolled steel standards.
• Welding consumables per IS welding specs.
• Dimensions per Table 1 for shelving cabinets.

graph TD
A[Material Selection] --> B[Mild Steel Rounds & Flats (Fe 310-0)]
A --> C[Sheet Metal Components]
C --> D[Hot Rolled Steel Sheets]
C --> E[Cold Rolled Steel Sheets]
A --> F[Welding Consumables]
F --> G[Filler Rods & Wires]
F --> H[Covered Electrodes]
F --> I[Spot Welding Electrodes]

This ensures compliance with IS 3312 material specifications.

IS 3312: Dimensions and Tolerances for Steel Shelving Cabinets

1. Overall Dimensions (Clause 3.1 & Table 1)

*Excluding pedestal height.

2. Tolerances (Clause 3.2)

• Overall dimension tolerance: ±5 mm on height, width, and depth.

3. Inside Locker Dimensions (Clause 4.10 & Table 2)

4. Screws (Clause 2.5)

• Screws must conform to IS 1365-1978.

Summary Diagram (Shelving Cabinet Dimensions)

graph TD
A[Steel Shelving Cabinet] --> B[Overall Dimensions]
B --> C[Height: 1155 / 1855 mm]
B --> D[Width: 760 / 910 mm]
B --> E[Depth: 430 / 480 mm]
A --> F[Inside Locker Dimensions]
F --> G[Height: 250 / 300 mm]
F --> H[Width: 758 / 908 mm]
F --> I[Depth: 380 / 430 mm]

Note: All dimensions are in millimeters; tolerances apply to overall dimensions only.

IS 3312: Components and Construction - Key Points

1. Sheet Metal Components (Clause 8.1)

• Components are fabricated from hot rolled or cold rolled carbon steel sheets as per relevant IS standards.
• Welding specifications:
  • Gas welding filler rods and wires (2nd revision).
  • Covered electrodes for metal arc welding of sheets (Part 2, 4th revision).
  • Resistance spot-welding electrodes.
• Screws: Use slotted countersunk head screws (3rd revision).

2. Dimensions of Shelving Cabinets (Clause 3.1, Table 1)

*Height excludes pedestal height.

3. Protection Against Corrosion (Clause 9.5)

• Test panel size: 150 x 100 mm, thickness 1.25 mm.
• Must show no corrosion after condensation test per IS 101-1964.

Summary Diagram: Components Fabrication Flow

flowchart TD
    A[Raw Steel Sheets] --> B[Cutting to Size]
    B --> C[Forming & Bending]
    C --> D[Welding]
    D --> E[Assembly with Screws]
    E --> F[Surface Treatment & Corrosion Protection]

This ensures compliance with IS 3312 for steel shelving cabinets.

IS 3312 Welding & Assembly Key Points

Welding Methods (Clause 5.2)

• Gas Welding: As per IS 1323:1966
• Arc Welding: As per IS 816:1969 (Part 2 for sheets)
• Spot Welding: As per IS 819:1957

Assembly (Clause 5.1)

• Components joined by bolting or welding.

Fabrication Dimensions (Clause 3.1, Table 1)

*Height excludes pedestal height.

Additional Notes:

• Follow relevant IS codes for electrodes, filler rods:
  • IS for filler rods & wires (gas welding)
  • IS for covered electrodes (arc welding)
  • IS for spot welding electrodes
• Sheet metal components per Clause 8.1.

Welding Assembly Flow (Mermaid Diagram)

flowchart TD
    A[Start Fabrication] --> B{Select Welding Type}
    B -->|Gas Welding| C[IS 1323]
    B -->|Arc Welding| D[IS 816]
    B -->|Spot Welding| E[IS 819]
    C --> F[Assemble Components]
    D --> F
    E --> F
    F --> G[Final Assembly by Bolting or Welding]
    G --> H[Complete]

For detailed welding parameters, refer to the respective IS codes mentioned above.

IS 3312: Accessories for Steel Shelving Cabinets

Key Specifications & Dimensions

Cabinet Dimensions (excluding pedestal height)

Welding Standards for Accessories

• Gas Welding: IS 1323-1966
• Arc Welding: IS 816-1969
• Spot Welding: IS 819-1957

Notes

• Pedestal height is excluded from cabinet height.
• Mirror frames are generally fixed on the left door outside.
• Tie hangers must be finished as per Clause 8.1 (sheet metal components).

flowchart LR
    A[Steel Shelving Cabinet] --> B[Mirror Frame]
    A --> C[Mirror]
    A --> D[Tie Hanger]
    B --> E[Mild steel sheet ≥ 0.8 mm]
    C --> F[Plate glass ≥ 5 mm]
    D --> G[Aluminium or mild steel sheet ≥ 0.63 mm]

This summary provides key accessory specs and fabrication references per IS 3312.

IS 3312 - Finishing: Key Specifications & Formulas

1. Finishing Requirements (Clause 8.2 & 8.1.3)

• All components must be finished in a colour agreed by purchaser & manufacturer.
• Enamel paint coats to be applied as:
  • Primer coat (phosphate treatment recommended for corrosion protection)
  • One or more coats of enamel paint conforming to:
    • IS 151-1950
    • IS 2932-1974
    • IS 2933-1975

2. Performance Requirements (Clause 9)

• Finish should ensure corrosion resistance, durability, and aesthetic appeal.
• Phosphate treatment (IS code referenced) is recommended before painting.

3. Purchaser's Information (Clause 10.1)

• Specify:
  • Locker/drawer requirement
  • Number of adjustable shelves
  • Colour of finish
  • Alternative construction/finish methods if any

4. Typical Dimensions of Shelving Cabinets (Clause 3.1, Table 1)

*Excluding pedestal height.

5. Recommended Finishing Process Flow

flowchart TD
    A[Surface Preparation] --> B[Phosphate Treatment]
    B --> C[Primer Coat Application]
    C --> D[Enamel Paint Coats]
    D --> E[Final Inspection & Approval]

Summary:

• Use phosphate treatment for corrosion protection.
• Apply enamel coats as per IS 151, IS 2932, IS 2933.
• Final finish colour per purchaser's agreement.
• Cabinet sizes standardized for fabrication.

This ensures durability, corrosion resistance, and aesthetic compliance as per IS 3312.

IS 3312: Surface Preparation Key Points

1. Surface Cleaning (Clause 8.1.1)

• Remove dents, burrs, sharp edges.
• Pickle, scrub, and rinse to remove grease, rust, scale, foreign matter.

2. Phosphating Treatment (Clause 8.1.2)

• Apply phosphating conforming to Class C of IS 3618-1966 immediately after pickling.
• Follow application process as per IS 6005-1970.
• Use putty (IS 110-1968) for filling.
• Apply aluminium primer conforming to IS 5660-1970.

3. Corrosion Protection Test (Clause 9.5)

• Test panel: 150 mm x 100 mm x 1.25 mm mild steel.
• Test per IS 101-1964 Clause 18 (condensation corrosion test).
• No corrosion signs post-test.

4. Flexibility and Adhesion Test (Clause 9.3)

• Sample: 150 mm x 50 mm x 0.315 mm mild steel.
• Test per IS 101-1964 Clause 16.
• Paint film must show no damage, cracking, or detachment under 10x magnification.

Summary Table: Surface Preparation Steps

flowchart TD
    A[Start: Steel Component] --> B[Remove dents, burrs, sharp edges]
    B --> C

IS 3312 - Testing Key Points

• Rounding off results (Clause 0.4):
  Test results must be rounded per IS 2-1960, retaining the same significant figures as the specified values.

• Pressure Test (Clause 9.2):

  • Sample: Mild steel plate, thickness 0.315 mm
  • Test as per IS 101:1964 Clause 15.2
  • Acceptance: No visible metal surface after test separation

• Corrosion Protection Test (Clause 9.5):

  • Sample: Mild steel panel 150 x 100 mm, thickness 1.25 mm
  • Test as per IS 101:1964 Clause 18
  • Acceptance: No corrosion signs after condensation test

Relevant Dimensions for Shelving Cabinets (Clause 3.1)

Excludes pedestal height.

Summary Table for Testing Parameters

If needed, I can provide a flow diagram of the testing process.

IS 3312 - Marking of Steel Shelving Cabinets

Key Specifications on Marking (Clause 12.1 & 12.1.1)

• Mandatory Marking: All steel shelving cabinets must bear a mark identifying the manufacturer.
• ISI Certification Mark: Cabinets may also be marked with the ISI Certification Mark, indicating compliance with Indian Standards under ISI's quality control and inspection system.
• Usage of ISI Mark: Governed by the Indian Standards Institution (Certification Marks) Act and related rules.
• Purpose: Ensures product conformity and quality assurance.

Manufacturer Identification Marking:

• Should be clear and durable on the cabinet.
• Helps traceability and accountability.

Contact for ISI Mark Licensing:

• Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002
• Regional and branch offices are listed for support and licensing.

Summary Table for Marking Requirements

If you need to comply with ISI marking, contact the nearest ISI regional office for licensing details.

flowchart TD
    A[Steel Shelving Cabinet] --> B[Manufacturer Mark (Mandatory)]
    A --> C[ISI Certification Mark (Optional)]
    C --> D[ISI Licensing & Inspection]
    D --> E[Quality Assurance & Conformity]

IS 3312: Installation Clearances for Shelving Cabinets

Key Installation Clearances (Clause 3.1 Note):

• Top clearance: 20 mm
• Side clearance: 10 mm each side
• Depth clearance: 5 mm

These clearances ensure proper fitting into recesses/openings.

Dimensions of Shelving Cabinets (Table 1):

*Height excludes pedestal height.

Inside Dimensions of Lockers (Table 2):

Safe Distributed Loads on Shelves (Table 3):

Summary Diagram:

graph TD
A[Shelving Cabinet] --> B[Top Clearance: 20 mm]
A --> C[Side Clearance: 10 mm each side]
A --> D[Depth Clearance: 5 mm]

Use these clearances and dimensions for proper installation and safe loading per IS 3312.

IS 3312 Locking Mechanisms - Key Specifications & Tables

1. Lock Specifications (Clauses 4.9 & 4.10.3.1)

• Lock Type: Minimum 6-lever lock with duplicate keys.
• Material: Locks and keys made from non-corrodible material.
• Lock Standard: Locks must conform to IS 729:1979.
• Locking System:
  • Lockers: Two-way bolting system controlled by the lock.
  • Steel shelving cabinets: Three-way bolting device controlled by lock.
• Handles: Made of brass or zinc base alloy or other non-corrodible materials.

2. Locker Inside Dimensions (Clause 4.10, Table 2)

3. Summary

• Locks: 6-lever, duplicate keys, non-corrodible.
• Locking: Two-way bolting (lockers), three-way bolting (steel cabinets).
• Handles: Brass/zinc alloy, non-corrodible.
• Locker sizes standardized as per Table 2.

flowchart LR
    A[Locker] --> B[6-lever Lock]
    B --> C{Locking System}
    C -->|Two-way Bolting| D[Locker]
    C -->|Three-way Bolting| E[Steel Shelving Cabinet]
    B --> F[Duplicate Keys]
    B --> G[Non-corrodible Material]
    A --> H[Handle]
    H --> I[Brass or Zinc Alloy]

This ensures durability, security, and standardization as per IS 3312.