steel glass-front cabinets

IS 7760: Scope - Key Specifications & Dimensions for Steel Glass-Front Cabinets

Scope Summary:

• Steel glass-front cabinets are assembled from specified components (Clauses 4.2 to 4.14).
• Compliance testing values are rounded per IS 2-1960.
• Materials and welding consumables conform to relevant IS specifications for electrodes, rods, sheets, and bars.

Key Dimensions (Clause 3.1)

Pressure Test (Clause 7.2)

• Test samples: Mild steel plate, thickness 0.315 mm.
• Test as per IS 101-1964 (15.2).
• No visible metal surface after test separation.

Related IS Specifications Referenced:

• Welding rods & electrodes (Gas welding, Arc welding, Spot welding).
• Steel bar and flat dimensions.
• Cold & hot rolled carbon steel sheets.
• Paints and phosphating treatments for corrosion protection.

flowchart LR
    A[Steel Glass-Front Cabinet] --> B[Components (4.2 to 4.14)]
    A --> C[Dimensions (3.1)]
    C --> D[Height: 1980 mm]
    C --> E[Width: 910 mm]
    C --> F[Depth: 480 mm]
    A --> G[Pressure Test (7.2)]
    G --> H[Mild steel plate 0.315 mm]
    G --> I[IS 101-1964 standard]

Summary: IS 7760 defines cabinet dimensions, material specs, welding consumables, and testing protocols ensuring standardized manufacture and quality control.

IS 7760: Key Materials Specifications & References

Steel Materials:

• Mild steel sheets: Conform to IS 513:1973 (Grade 0) or IS 1079:1973 (Grade 0) (Clause 2.3).
• Steel bars: Dimensions for round, square bars as per IS standards (first revision).
• Steel flats: Dimensions as per IS standards (first revision).
• Cold rolled carbon steel sheets: As per IS specification (second revision).
• Hot rolled carbon steel sheets & strips: As per IS specification (third revision).

Welding Materials:

• Filler rods and wires for gas welding (second revision).
• Covered electrodes for metal arc welding of structural steel (Part 2, fourth revision).
• Resistance spot-welding electrodes.

Surface Treatment & Paints:

• Phosphating treatment for corrosion protection.
• Ready mixed paints and enamels for primers and finishing coats.
• Aluminium red oxide primer and exterior enamel specifications.

Testing:

• Pressure test on mild steel plate samples (0.315 mm thickness) as per IS 101:1964 (Clause 7.2).
• Surface must remain intact post-test.

Summary Table of Key Material Specs

flowchart LR
    A[Steel Components] --> B[Mild Steel Sheets (IS 513/1079)]
    A --> C[Steel Bars & Flats (IS Dimensions)]
    A --> D[Cold & Hot Rolled Sheets (IS Specs)]
    E[Welding Materials

IS 7760: Dimensions and Tolerances for Steel Glass-Front Cabinets

1. Dimensions (Clause 3.1 & Table)

• Refer Fig. 1 in IS 7760 for detailed layout.

2. Tolerances (Clause 3.2)

• Overall dimensions shall not vary by more than ± 5 mm.

3. Screws (Clause 2.4)

• Screws must conform to:
  • IS 1365-1978-11
  • IS 1366-1968

Summary

• Maintain cabinet dimensions within ±5 mm tolerance.
• Use screws as per specified IS standards.
• Follow component assembly clauses (4.2 to 4.14) for construction.

flowchart LR
    A[Steel Glass-Front Cabinet] --> B[Height: 1980 mm]
    A --> C[Width: 910 mm]
    A --> D[Depth: 480 mm]
    A --> E[Tolerance: ±5 mm]
    A --> F[Screws per IS 1365 & IS 1366]

This ensures compliance with IS 7760 dimensional and fastening requirements.

IS 7760: Construction and Components - Key Points

1. Sheet Metal Components (Clause 6.1)

• Components mainly include cold or hot rolled carbon steel sheets.
• Welding materials and methods specified:
  • Filler rods and wires for gas welding (2nd revision).
  • Covered electrodes for metal arc welding of sheets (4th revision).
  • Resistance spot-welding electrodes.
• Steel bars and flats conform to standard dimensions (1st revision).

2. Dimensions of Steel Glass-Front Cabinets (Clause 3.1)

• Tolerances as per Table 3 (Clause 3.1) and Fig. 1 (not shown here).

3. Components Assembly (Clause 4.1)

• Cabinets assembled from components listed in Clauses 4.2 to 4.14.
• Components include steel sheets, bars, flats, screws (slotted countersunk headscrews 3rd revision).

4. Finish (Clause 6.2)

• All components finished in agreed color between purchaser and manufacturer.

Summary Table of Materials & Specifications

flowchart TD
    A[Steel Glass-Front Cabinet] --> B[Sheet Metal Components]
    A --> C[Steel Bars & Flats]
    A --> D[Welding Electrodes]
    A --> E[Screws & Fasteners]
    B --> F[Cold Rolled Sheets]
    B --> G[Hot Rolled Sheets]
    D --> H[Gas Welding Rods]
    D --> I[Arc Welding Electro

IS 7760: Components Overview for Steel Glass-Front Cabinets

Key Dimensions (Clause 3.1)

Components (Clause 4.1)

• Cabinets assembled from components listed in Clauses 4.2 to 4.14.
• Includes sheet metal parts, steel bars, flats, and fasteners.

Sheet Metal Components (Clause 6.1)

• Use cold rolled carbon steel sheets (2nd revision).
• Use hot rolled carbon steel sheets and strips (3rd revision).
• Welding materials per:
  • Filler rods and wires for gas welding (2nd revision).
  • Covered electrodes for metal arc welding (Part 2, 4th revision).
  • Resistance spot-welding electrodes.

Fasteners

• Slotted countersunk headscrews (3rd revision).

Finishing (Clause 6.2)

• Components finished in purchaser-agreed colour.

Summary Table: Material & Welding Specs

flowchart LR
    A[Steel Glass-Front Cabinet] --> B[Sheet Metal Components]
    A --> C[Steel Bars and Flats]
    A --> D[Fasteners]
    B --> E[Cold Rolled Sheets]
    B --> F[Hot Rolled Sheets]
    D --> G[Slotted Countersunk Headscrews]
    B --> H[Welding Electrodes & Rods]

This concise overview aligns with IS 7760 specifications for component selection, dimensions, materials, and finishing.

IS 7760 Key Specifications for Back Panel of Steel Glass-Front Cabinets

Back Panel Specifications (Clause 4.3)

• Material: Steel sheet, minimum thickness 0.8 mm
• Quality: Free from burrs and dents
• Width: Equal to cabinet width (910 mm per Clause 3.1)
• Height: Extends between top and bottom surfaces (full cabinet height 1980 mm)

Cabinet Overall Dimensions (Clause 3.1)

Additional Notes

• Back panel is a full-height sheet covering the entire rear face.
• Edges must be smooth to avoid injury or damage.
• Back panel is fixed using slotted cheese head screws as per Clause 1.6 (diameter range 1.6 to 20 mm).

Summary Table for Back Panel

graph TB
    Cabinet -->|Width 910 mm| Back[Back Panel]
    Cabinet -->|Height 1980 mm| Back
    Back -->|Thickness ≥ 0.8 mm| SteelSheet
    SteelSheet -->|No burrs/dents| Quality

This ensures structural integrity and proper enclosure of the cabinet.

IS 7760: Top Panel Specifications for Steel Glass-Front Cabinets

Key Specifications (Clause 4.4)

• Material: Steel sheet, minimum thickness 0.8 mm
• Dimensions:
  • Length = Width of cabinet = 910 mm (Clause 3.1)
  • Breadth = Depth of cabinet = 480 mm (Clause 3.1)
• Edge Detail: Front edge to have a round lipped flange for safety and rigidity

Cabinet Overall Dimensions (Clause 3.1)

Additional Notes

• The top panel must fully cover the cabinet width and depth.
• The flange increases stiffness and prevents sharp edges.
• Use 0.8 mm thick steel sheet to maintain structural integrity and durability.

Visual Concept: Top Panel Layout

graph TD
A[Top Panel] --> B[Length = 910 mm]
A --> C[Breadth = 480 mm]
A --> D[Thickness = 0.8 mm steel sheet]
A --> E[Front edge: Round lipped flange]

This ensures the top panel fits precisely and safely on the cabinet frame.

IS 7760: Shelf Supporting Arrangement Key Points

• Shelf Material: Steel sheet, min. 0.8 mm thick with lipped flanges (25 mm width × 15 mm depth).
• Bracket Material: Steel sheet, min. 1.6 mm thick.
• Support: Each shelf supported on 4 adjustable brackets.
• Rack Strips: Full height of cabinet, steel sheet min. 1.0 mm thick.
• Adjustment: Brackets designed for easy shelf height adjustment inside rack strips.

Typical Dimensions (Steel Glass-Front Cabinets)

Shelf Support Design Notes:

• Brackets must securely hold shelves and allow vertical adjustment.
• Rack strips run full cabinet height, enabling flexible shelf positioning.
• Shelves have lipped flanges for rigidity and better load distribution.

Diagram: Shelf Support Arrangement

graph LR
A[Steel Shelf with Lipped Flanges] --> B[4 Adjustable Brackets]
B --> C[Rack Strips (Full Height)]
C --> D[Steel Cabinet Frame]

This ensures stable, adjustable shelving meeting IS 7760 specifications.

IS 7760 - Doors for Steel Glass-Front Cabinets: Key Specifications

• Door Frame (Clause 4.7.1):

  • Max border width: 65 mm
  • Steel sheet thickness: ≥ 1.0 mm
  • Door in two sections (top & bottom), each fitted with glass
  • Hinged on right side
  • Includes hole for handle & slot for key

• Glass (Clause 4.14):

  • Quantity: Two plain glasses per door
  • Dimensions: 850 mm (L) × 350 mm (W)
  • Thickness: ≥ 3 mm
  • Conforms to IS 1761-1960
  • Held by vertical & horizontal strips of mild steel sheet, thickness ≥ 0.8 mm

• Clearance (Clause 4.8):

  • Between door flanges & cabinet flanges (side, top, bottom): ≤ 1.25 mm
  • Between two closed doors: ≤ 1.25 mm

Summary Table

flowchart LR
    A[Door Frame] --> B[Steel Sheet ≥1.0 mm]
    A --> C[Border ≤65 mm]
    A --> D[Two Sections: Top & Bottom]
    D --> E[Glass 850×350×≥3mm]
    E --> F[Held by strips ≥0.8 mm]
    A --> G[Hinged Right Side]
    A --> H[Handle Hole & Key Slot]

This ensures durability, proper fit, and safety for steel glass-front cabinet doors per IS 7760.

Clearance Around Doors (IS 7760 - Clause 4.8):

• Maximum clearance between door flanges and side, top, bottom flanges: 1.25 mm
• Maximum clearance between two closed doors: 1.25 mm

Key Dimensions (Clause 3.1)

Door Specifications (Clause 4.7.1)

• Door border width: ≤ 65 mm
• Steel sheet thickness: ≥ 1.0 mm
• Door in two sections (top & bottom), each fitted with glass
• Hinged on right side with handle hole and key slot

Glass Specifications (Clause 4.14)

• Glass size per door section: 850 mm × 350 mm
• Glass thickness: ≥ 3 mm (per IS:1761-1960)
• Glass held by mild steel strips, thickness ≥ 0.8 mm

Summary Diagram of Door Clearance:

flowchart LR
    A[Door Flange] -- max 1.25 mm --> B[Side/Top/Bottom Flange]
    C[Door 1] -- max 1.25 mm --> D[Door 2 (closed)]

Note: Maintain these clearances strictly to ensure proper door operation and sealing in steel glass-front cabinets.

IS 7760 - Pedestals Specifications and Key Points

• Material: Steel sheet, minimum thickness 1.0 mm (Clause 4.9)
• Stiffening: Pedestals must be properly stiffened to maintain shape and strength.
• Projection: Pedestals shall not project out of the cabinet footprint.
• Height: Minimum height 125 ± 5 mm (updated from 100 mm in earlier editions).
• Cabinet Dimensions (for reference):

  Dimension	Size (mm)
  Height	1980
  Width	910
  Depth	480

Summary Table for Pedestal Dimensions

Notes:

• Proper stiffening can be achieved by flanging or adding ribs to the pedestal sheet metal.
• The pedestal height ensures ergonomic and structural stability for the cabinet.

graph TD
A[Steel Sheet (≥1.0 mm)] --> B[Pedestal]
B --> C[Height 125 ± 5 mm]
B --> D[Proper Stiffening]
B --> E[No Projection beyond Cabinet]

This ensures durability, corrosion resistance, and dimensional coordination as per IS 7760.

IS 7760: Locking Mechanism Key Points

Lock Specifications (Clause 4.12 & 4.12.1)

• Lock type: Minimum six-lever lock with duplicate keys.
• Material: Non-corrosive metal.
• Standard: Conforms to IS 729-1979.
• Base plate thickness: ≥ 20 mm, fitted on the right door.
• Non-interchangeability:
  • Each lock must have a unique lever combination.
  • No two locks share the same lever combination unless lever thickness, number, radius of sweep, or step increments are altered.

Locking Mechanism (Clause 4.11)

• Two-way bolting: Bolts at both top and bottom.
• Security: Bolts must be inaccessible from outside when locked.

Summary Table

flowchart LR
    A[Lock (6-lever)] --> B[Base Plate (≥20mm)]
    B --> C[Right Door]
    A --> D[Unique Lever Combination]
    E[Two-way Bolting] --> F[Top Bolt]
    E --> G[Bottom Bolt]
    F & G --> H[Inaccessible from outside]

This ensures robust security and compliance with IS 7760 locking mechanism requirements.

Lock Specifications as per IS 7760

Clause 4.12: Lock Requirements

• Minimum six-lever lock with duplicate keys made of non-corrosive metal.
• Lock must conform to IS 729-1979.
• Base plate thickness for lock on right door: ≥ 20 mm.

Clause 4.12.1: Non-Interchangeability

• Each lock must have a unique lever combination.
• No two locks share the same combination unless:
  • Lever thickness,
  • Number of levers,
  • Radius of sweep of steps, or
  • Increment in steps are altered.

Summary Table: Lock Specifications

Additional Notes:

• Lock fitted on right door only.
• Ensure lever combinations are carefully selected to avoid duplication.

flowchart LR
    A[Lock] --> B[6 Levers]
    A --> C[Duplicate Keys]
    A --> D[Non-corrosive Metal]
    A --> E[Base Plate ≥ 20mm]
    B --> F[Unique Lever Combination]
    F --> G[No Duplicate Keys]

This ensures secure, standardized locking as per IS 7760.

IS 7760 - Handles: Key Specifications

• Material:

  • Cast brass as per IS 292-1961
  • Zinc base alloy casting as per IS 742-1981

• Dimensional Tolerances:

  • Overall dimensions tolerance: ± 5 mm (Clause 3.2)

• Screws for Fixing Handles:

  • Must conform to IS 1365-1978 and IS 1366-1968

Summary Table: Handle Material & Standards

Notes:

• Handles should be robust enough for operational loads.
• Ensure compatibility of screws with handle material to avoid galvanic corrosion.
• Follow dimensional tolerances strictly to maintain assembly fit.

flowchart LR
A[Handle Material] --> B{Material Type}
B --> C[Cast Brass (IS 292)]
B --> D[Zinc Alloy (IS 742)]
E[Screws] --> F[IS 1365 & IS 1366]
G[Dimensional Tolerance] --> H[± 5 mm]

IS 7760: Key Specifications for Glasses in Steel Glass-Front Cabinets

• Glass Size:

  • Length = 850 mm
  • Width = 350 mm

• Glass Thickness:

  • Minimum thickness = 3 mm
  • Glass must conform to IS: 1761-1960 (specifies quality and type of glass)

• Mounting:

  • Two plain glasses fitted per door
  • Held by vertical and horizontal strips from inside
  • Strips made of mild steel sheet, thickness ≥ 0.8 mm
  • Strips are screwed to secure the glass

Cabinet Overall Dimensions (Clause 3.1)

Summary Diagram of Glass Fitting

graph TD
    A[Door Frame] --> B[Vertical Steel Strip (≥0.8 mm)]
    A --> C[Horizontal Steel Strip (≥0.8 mm)]
    B & C --> D[Glass Pane (850x350x3 mm)]
    D --> E[Secured by Screws from Inside]

Note: For detailed glass quality and safety requirements, refer to IS: 1761-1960. Use mild steel strips as per IS specifications for structural integrity.

IS 7760 - Assembly of Steel Glass-Front Cabinets: Key Points

Components (Clause 4.1)

• Steel glass-front cabinets are assembled from components specified in Clauses 4.2 to 4.14.
• Components include steel bars, flats, sheets, screws, and welding materials.

Welding Specifications

• Filler rods and wires: As per Specification for filler rods and wires for gas welding (2nd revision).
• Covered electrodes: For metal arc welding of structural steel sheets (Part 2, 4th revision).
• Resistance spot-welding electrodes: As per relevant standards.

Dimensions & Materials

• Round and square steel bars: Dimensions as per first revision.
• Steel flats: Dimensions as per first revision.
• Cold rolled carbon steel sheets: Second revision.
• Hot rolled carbon steel sheets and strips: Third revision.

Screws (Clause 2.4 & 1.6)

• Screws must conform to IS 1365-1978 and IS 1366-1968.
• Slotted cheese head screws diameter range: 1.6 mm to 20 mm.

Typical Assembly Considerations:

• Use correct welding electrodes per material thickness.
• Maintain dimensional tolerances for proper fit.
• Use specified screws for fastening to ensure structural integrity.

Summary Table: Common Components & Standards

flowchart LR
    A[Steel Bars & Flats] --> B[Welding Components]
    B --> C[Assembly of Cabinet Frame]
    D[Screws & Fast

IS 7760: Finishing and Surface Treatment - Key Points

1. Phosphating Treatment

• Standard: Phosphating to conform to Class C of IS:3618-1966.
• Process: As per IS:6005-1970.
• Purpose: Corrosion protection immediately after pickling.

2. Paint and Primer Specifications

• Putty: Conforms to IS:110-1968.
• Aluminium Red Oxide Primer: Conforms to IS:5660-1970.
• Ready Mixed Paints & Enamels: Various IS codes cover brushing, spraying, stoving, and finishing paints.

3. Tests on Finished Samples

4. Summary Flow of Surface Treatment

flowchart TD
    A[Pickling] --> B[Phosphating (IS:3618, IS:6005)]
    B --> C[Putty Application (IS:110)]
    C --> D[Primer Application (Aluminium Red Oxide, IS:5660)]
    D --> E[Final Paint/Enamel Coating]
    E --> F[Testing: Pressure, Corrosion, Flexibility & Adhesion]

Note: All finishing steps ensure corrosion resistance, adhesion, and durability per IS standards.

IS 7760 - Marking Specifications for Steel Glass-Front Cabinets

Key Marking Requirements (Clause 10.1)

• Cabinet Marking: Must bear a suitable manufacturer’s mark.
• Key Marking: Must include maker's name and an identification number distinct from key step numbers.
• Lock Marking: Identification number must match the key’s identification number.

Optional Marking (Clause 10.1.1)

• Cabinets may bear the ISI Certification Mark indicating compliance with Indian Standards.
• ISI Mark ensures:
  • Production under strict quality control.
  • Continuous ISI inspection and testing.
  • Licensing governed by Indian Standards Institution.

Contact Information for ISI Licensing

• Regional and branch offices listed for licensing and certification queries.

Summary Table: Marking Details

This marking ensures traceability, quality assurance, and compliance with IS standards.

flowchart LR
    A[Steel Cabinet] -->|Mark| B[Manufacturer's Mark]
    C[Key] -->|Mark| D[Maker's Name + Unique ID]
    E[Lock] -->|Mark| F[Same ID as Key]
    B & D & F --> G[Traceability & Quality Assurance]
    G --> H[Optional ISI Mark]

For detailed licensing and ISI mark use, contact the nearest ISI office.