steel clothes lockers - Specification

IS 3314: Scope - Key Points & Specifications

Scope Overview:

• IS 3314 covers steel clothes lockers including materials, construction, and testing.
• Ensures compliance with quality via ISI Certification Mark (Clause 12.1.1).
• Applies to lockers produced under strict inspection, testing, and quality control supervised by ISI.

Important Specifications & Notes:

• Marking: Lockers may carry the ISI mark, indicating conformity to the standard.
• Testing: Includes flexibility and adhesion tests on mild steel plates (150 x 50 mm, 0.315 mm thick) per IS 101-1964 (Clause 9.3).
• Rounding Off: Final test values should be rounded per IS:2-1960 to maintain consistency.
• Paints & Coatings: References to specifications for primers and enamels for corrosion protection and finishing.

Relevant Units & Definitions (SI Units):

Summary Diagram: Scope and Testing Flow

flowchart TD
    A[Steel Clothes Lockers] --> B[Manufacturing]
    B --> C[Quality Control]
    C --> D[Marking with ISI Certification]
    C --> E[Testing]
    E --> F[Flexibility & Adhesion Test (IS 101-1964)]
    E --> G[Paint & Coating Specifications]
    F --> H[Pass/Fail]
    G --> H

For detailed design or dimensional tables, refer to the full IS 3314 document sections on material properties and locker dimensions.

IS 3314 - Materials Key Points

1. Steel Sheet Components (Clause 8.1)

• Steel sheets used must conform to specified grades for strength and corrosion resistance.
• Thickness and finish as per design requirements.
• Surface treatments like phosphating (for corrosion protection) are recommended.

2. Material Grades (Revision 1976)

• Specifies grades of steel to ensure durability and performance.
• Mild steel plates commonly used with thickness ~0.315 mm for test samples.

3. Tests for Paint and Coatings (Clause 9.3)

• Flexibility & adhesion test on mild steel plate (150 x 50 mm, thickness 0.315 mm).
• No cracking or detachment of paint under 10x magnification.
• Phosphate treatment recommended for corrosion resistance.

4. Units & Definitions (SI Units Table)

Summary Table: Steel Sheet for Lockers

flowchart TD
    A[Steel Sheet Components] --> B[Material Grades]
    B --> C[Surface Treatment: Phosphating]
    C --> D[Paint Application]
    D --> E[Flexibility & Adhesion Test]
    E --> F[No Cracking/Detachment]

Note: For detailed paint specifications, refer to IS 101 and related paint standards mentioned in IS 3314.

IS 3314 - Types of Clothes Lockers: Key Specifications

Types of Lockers (Clause 3.1)

• 6-locker type
• 8-locker type
• 12-locker type
• 18-locker type

(Fig. 1 in IS 3314 shows component divisions for each type)

Locking Arrangements (Clause 5.9.1)

• 6 & 8-locker types: Internal locking arrangement.
• 12 & 18-locker types: Hasp and staple or built-in hasp and staple arrangement.

Dimensions & Tolerances (Clause 4.1)

Notes:

• Material: Hot rolled or cold rolled carbon steel sheets.
• Fasteners: Slotted countersunk head screws as per IS specifications.

graph LR
A[Clothes Lockers] --> B[6-locker]
A --> C[8-locker]
A --> D[12-locker]
A --> E[18-locker]

B & C --> F[Internal Locking]
D & E --> G[Hasp & Staple Locking]

This summary aligns with IS 3314 requirements for steel clothes lockers.

IS 3314 - Dimensions and Tolerances for Clothes Lockers

1. Dimensions (Clause 4.1)

• Height: 1855 mm (excluding pedestal height)
• Clearance for recess/openings:

  Location	Clearance
  Top	20 mm
  Each side	10 mm
  Depth	5 mm

2. Tolerances (Clause 4.2)

• Overall dimension tolerance: ± 5 mm

3. Types of Clothes Lockers (Clause 3.1)

• 6-locker type
• 8-locker type
• 12-locker type
• 18-locker type

Summary Table:

Notes:

• All components must be free from dents, burrs, and sharp edges (Clause 8.1.1).
• Surface preparation includes pickling, scrubbing, and rinsing to remove contaminants.

flowchart LR
    A[Locker Types] --> B[6-locker]
    A --> C[8-locker]
    A --> D[12-locker]
    A --> E[18-locker]

    F[Dimensions] --> G[Height: 1855 mm ±5 mm]
    F --> H[Clearance: Top 20 mm]
    F --> I[Clearance: Side 10 mm]
    F --> J[Clearance: Depth 5 mm]

This concise guide helps ensure compliance with IS 3314 dimensional standards and tolerances for clothes lockers.

IS 3314: Construction Details - Key Formulas, Tables & Specifications

1. Steel Sheet Components (Clause 8.1)

• Use mild steel sheet, thickness ≥ 0.8 mm.
• Sheets must be free from burrs and dents.

2. Top and Bottom Dimensions (Clause 5.3)

• Length: Covers the full width of the locker.
• Breadth: Covers the full depth.
• Material: Mild steel sheet, thickness ≥ 0.8 mm.

3. Overall Dimensions & Clearances (Clause 4.1)

4. Corrosion Protection Test (Clause 9.5)

• Test panel size: 150 mm x 100 mm, thickness 1.25 mm.
• Finish per Clause 8.
• Test as per IS:101-1964, Clause 18.
• No corrosion allowed post-test.

Summary Diagram: Locker Dimensions & Clearances

graph TD
    A[Locker Height = 1855 mm] --> B[Top Clearance = 20 mm]
    A --> C[Side Clearance = 10 mm each side]
    A --> D[Depth Clearance = 5 mm]

References:

• Mild steel sheet specs: Hot rolled & cold rolled carbon steel sheets (3rd & 2nd revisions).
• Screws: Slotted countersunk head screws (3rd revision).

This ensures structural integrity, fit, and corrosion resistance as per IS 3314.

Welding Requirements as per IS 3314

1. Welding Methods (Clause 6.2):

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

2. Electrodes (Clause 2.1):

• Gas welding electrodes: IS 1278-1973
• Covered electrodes for metal arc welding (structural steel sheets): IS 814 (Part 2)-1974
• Spot welding electrodes: IS 4972-1968

3. Flexibility and Adhesion Test (Clause 9.3):

• Test specimen: Mild steel plate 150 x 50 mm, thickness 0.315 mm
• Test as per IS 101-1964, Clause 16
• Paint film must show no damage, detachment, or cracking under 10x magnification

Summary Table of Relevant IS Codes for Welding

Important Notes:

• Use electrodes and welding methods strictly conforming to the above IS codes for quality and safety.
• Perform flexibility and adhesion tests on painted welds to ensure durability.
• Refer to the respective IS codes for detailed welding procedures, electrode types, and test methods.

flowchart TD
    A[Welding Requirements] --> B[Gas Welding]
    A --> C[Arc Welding]
    A --> D[Spot Welding]
    B --> E[IS 1323-1966]
    C --> F[IS 816-196

IS 3314 - Additional Accessories (Clause 7)

Key Specifications:

• Coat Hooks (6-locker type):

  • Material: Mild steel or aluminium
  • Finish: Nickel or chromium plated (IS: 1068-1968) or anodized (aluminium)
  • Location: Centre underside of the shelf
  • Feature: Ball pointed ends

• Number Plates:

  • Material: Polished aluminium
  • Numerals: Black, fixed on top of door front

• Hanging Rod:

  • Material:
    • Mild steel tubular pipe (IS: 7138-1973)
    • Aluminium tubular pipe
  • Dimensions:
    • Diameter: 20 mm
    • Wall thickness: ≥ 1.6 mm
  • Finish:
    • Mild steel rod covered with aluminium sheet (≥ 0.56 mm)
    • Aluminium rod anodized or buffed
  • Fitting: Suitable brackets

Welding Standards for Accessories (Clause 6.2)

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

Summary Table

This ensures durability, aesthetics, and compliance with IS standards for steel lockers.

Surface Preparation and Finishing as per IS 3314

Key Specifications:

• Phosphating Treatment:
  • Immediately after pickling, mild steel parts must receive phosphate treatment conforming to Class C of IS:3618-1966.
  • Application process per IS:6005-1970.
• Putty:
  • Use putty conforming to IS:110-1968 for surface filling.
• Primer:
  • Aluminium red oxide primer conforming to IS:5660-1970.
• Finishing:
  • Colour finish as agreed between purchaser and manufacturer (Clause 8.2).

Performance Tests:

• Flexibility and Adhesion Test (Clause 9.3):

  • Sample size: Mild steel plate 150 x 50 mm, thickness 0.315 mm.
  • Test per IS:101-1964, Clause 16.
  • No damage, detachment, or cracking under ×10 magnification.

• Corrosion Protection Test (Clause 9.5):

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

Summary Table:

IS 3314 Testing Procedures - Key Points

1. Rounding Off Results (Clause 0.4):

   • Final test values must be rounded per IS:2-1960.
   • Retain the same number of significant digits as specified in the standard.

2. Flexibility and Adhesion Test (Clause 9.3):

   • Test specimen: Mild steel plate 150 × 50 mm, thickness 0.315 mm.
   • Conduct test as per IS:101-1964 Clause 16.
   • Acceptance: No damage, detachment, or cracking under ×10 magnification.

3. Corrosion Protection Test (Clause 9.5):

   • Test specimen: Mild steel panel 150 × 100 mm, thickness 1.25 mm.
   • Conduct test as per IS:101-1964 Clause 18.
   • Acceptance: No corrosion after condensation exposure.

Summary Table of Test Specimens

Note: Refer to IS:101-1964 for detailed test methods on paints and enamels.

flowchart TD
    A[Test Specimen Preparation] --> B[Flexibility & Adhesion Test]
    A --> C[Corrosion Protection Test]
    B --> D{Examine Paint Film}
    D -->|No Damage| E[Pass]
    D -->|Damage| F[Fail]
    C --> G{Check Metal Surface}
    G -->|No Corrosion| E
    G -->|Corrosion| F

This concise framework ensures compliance with IS 3314 testing requirements.

IS 3314 - Information to be Supplied by the Purchaser (Clause 10)

When placing an order for steel lockers, the purchaser must provide the following details clearly:

• Type of locker (e.g., single-tier, double-tier)
• Sequence of numbering (if lockers are numbered)
• Colour of finish (specify paint/enamel colour)
• Method of construction and finish (if alternatives are offered)
• Corner details (whether corners are to be rounded or sharp)

Additional Relevant Specification:

• Corrosion Test (Clause 9.5):
  Mild steel panel size: 150 mm × 100 mm × 1.25 mm thickness
  Tested as per IS 101:1964 for condensation corrosion resistance. No corrosion should be visible post-test.

Summary Table for Purchaser Information

This ensures clarity in manufacturing and quality compliance per IS 3314.

flowchart TD
    A[Purchaser places order] --> B[Provide locker type]
    B --> C[Provide numbering sequence]
    C --> D[Provide finish colour]
    D --> E[Specify construction method]
    E --> F[Specify corner style]
    F --> G[Supplier manufactures locker]

For detailed corrosion testing, refer to IS 101:1964.

IS 3314 - Marking (Clause 12.1.1)

• Marking Requirement:
  Steel clothes lockers may be marked with the ISI Certification Mark to indicate compliance with IS standards.

• ISI Mark Significance:

  • Ensures product conformity under ISI's inspection, testing, and quality control system.
  • Continuous surveillance by ISI for quality assurance.
  • Use governed by Indian Standards Institution (Certification Marks) Act and related rules.

• Additional Notes:

  • Manufacturers must obtain a license from ISI to use the ISI mark.
  • Marking assures the purchaser of product quality and standard compliance.

Summary Table: ISI Marking on Steel Lockers

Related Testing Reference (Clause 9.3)

• Flexibility and Adhesion Test for painted mild steel plates:
  • Sample size: 150 x 50 mm, thickness 0.315 mm.
  • Paint film must show no damage or cracking under 10x magnification per IS:101-1964.

SI Units Reference (for related measurements)

flowchart LR
    A[Steel Clothes Locker] --> B[ISI Certification Mark]
    B --> C[Quality Assurance]
    C --> D[Inspection & Testing]
    C --> E[Continuous Surveillance]
    B --> F[License from ISI]

In brief: IS 3314 mandates optional ISI marking on steel lockers, ensuring compliance and quality under ISI supervision.

Quality Assurance in IS 3314 (Steel Clothes Lockers)

Key Points from Clause 12.1.1:

• ISI Certification Mark:

  • Indicates compliance with IS 3314 under a strict system of inspection, testing, and quality control.
  • The mark is governed by Indian Standards Institution (ISI) Acts and regulations.
  • Continuous conformity checks by ISI ensure product quality.

• Testing Requirements:

  • Flexibility and Adhesion Test (Clause 9.3):
    • Test piece: Mild steel plate, 150 x 50 mm, thickness 0.315 mm.
    • Test as per IS:101-1964, Clause 16.
    • Paint film must show no damage, detachment, or cracking under ×10 magnification.

• Rounding Off Values:

  • As per IS:2-1960, maintain significant digits consistent with specified values.

Recommended Quality Assurance Checklist:

SI Units Reference (for testing and documentation):

flowchart TD
    A[Raw Material Inspection] --> B[Surface Preparation]
    B --> C[Paint Application]
    C --> D[Flexibility & Adhesion Test]
    D --> E[Marking with ISI Certification]
    E --> F[Final Quality Assurance]

For detailed test methods, refer to