collapsible gates

IS 10521 - Scope & Key Specifications Summary

Scope (Clause 8.1)

• Purchaser must provide detailed information when placing orders for gates.
• Final test values must be rounded per IS 2-1960 rules, matching significant digits of specified values.

Key Specifications for Roller Wheels (Clause 6.3, Table 1)

Additional Notes (Clause 6.2)

• Channel spacing max 100 mm when gate closed.
• Channels rivetted in pairs with spacers; crossings placed between 450-600 mm height.
• Clear space between crossings ≤ 150 mm.
• Edges trimmed; locking eyes & handles welded/rivetted; roller wheels fitted accordingly.

This table and clauses define the scope and critical input data for ordering and manufacturing rolling gates as per IS 10521.

IS 10521: Definitions and Components of Collapsible Gates

Key Components (Clause 2.1 to 2.6 & Fig. 1):

• Vertical Channels: Rivetted in pairs, toes face to face, max spacing 100 mm (Clause 6.2).
• Crossings/Lacing: Positioned between vertical channels, one set 450–600 mm high, with ≤150 mm clear space between sets.
• Top Runner: Horizontal channel at the top supporting roller wheels.
• Roller Wheels: Sizes and quantities depend on gate width and panel type (see Table 1 below).
• Locking Eyes & Handles: Welded or rivetted on edges.

Table 1: Roller Wheel Requirements (Clause 6.3)

Additional Specifications:

• Spacing of Channels: Max 100 mm (Clause 6.2)
• Crossings Height: 450–600 mm (one set), clear space ≤150 mm between sets
• Rounding Off Numerical Values: As per IS 2-1960 (Clause 0.4)

flowchart TB
    A[Vertical Channels] --> B[Crossings/Lacing]
    B --> C

IS 10521: Classification & Specifications for Collapsible Gates

Key Specifications (Clause 6.1)

• Material: Rolled steel channels, T or E sections, and flats.
• Fabrication: As per Fig. 1 (typical gate framework).
• Rollers:
  • Bottom rollers on 'T' or 'E' bottom runners.
  • Alternatively, top rollers on flat top runners.

Classification (General Practice)

Collapsible gates are typically classified based on:

• Type of section used: Channels, T-sections, E-sections.
• Roller arrangement: Bottom rolling or top rolling.
• Size & spacing of vertical and horizontal members.

Typical Dimensions & Spacing (General Engineering Practice)

Roller Wheel Load Calculation (Example)

[ \text{Load per wheel} = \frac{\text{Total gate weight}}{\text{Number of wheels}} ]

Diagram: Typical Collapsible Gate Section

graph LR
A[Top Runner (Flat)] --> B[Roller Wheel]
B --> C[Vertical Channel]
C --> D[Horizontal Flats]
D --> E[Bottom Runner (T or E Section)]
E --> B

For detailed dimensions and fabrication, refer to IS 10521 Fig. 1 and related clauses.

IS 10521 - Materials: Key Specifications & Tables

1. Roller Wheels (Clause 6.3, Table 1)

2. Channel Spacing & Assembly (Clause 6.2)

• Max channel spacing: 100 mm (closed gate)
• Channels rivetted in pairs, toes face to face with spacers.
• Crossings placed 450-600 mm height, sets spaced ≤150 mm apart.
• Edges trimmed; locking eyes, handles welded/rivetted.
• Roller wheels fitted in respective channels.

3. Material Specifications Referenced

• Structural Steel (Ordinary Quality)
• Grey Iron Castings
• Wrought Aluminium Bars & Sections
• Rivets (below 12 mm diameter)

4. Finishing (Clause 6.7)

• Fabricated parts coated with red oxide primer (IS:102-1962).

This summary covers material-related requirements including roller wheel sizing, assembly spacing, and finishing per IS 10521. For detailed mechanical properties, refer to respective IS codes cited.

IS 10521: Components Specifications for Sliding Gates

Key Table: Roller Wheels Requirements (Clause 6.3)

Additional Specifications:

• Channel Spacing (Clause 6.2): Max 100 mm spacing between vertical channels when gate is closed.
• Crossings: One set between 450-600 mm height; clear space between sets ≤ 150 mm.
• Assembly: Channels rivetted in pairs, spacers inserted, edges trimmed, locking eyes and handles welded/rivetted, roller wheels fitted.
• Latches (Clause 7.2): Optional to hold channels in open position.

Notes:

• Final test values must be rounded per IS 2-1960.
• Purchaser must supply gate dimensions and specifications when ordering (Clause 8.1).

flowchart TD
    A[Gate Width & Panel Type] --> B[Select Roller Wheel Size & Quantity]
    B --> C{Ball Bearing Required?}
    C -->|Yes| D[Fit Ball Bearing]
    C -->|No/Optional| E[Fit Standard Roller Wheel]
    E --> F[Assemble Channels & Crossings]
    F --> G[Fit Roller Wheels]

IS 10521: Fabrication and Assembly Key Points

1. Fabrication & Workmanship (Clause 6.2)

• Channel spacing: Max 100 mm when gate closed.
• Vertical channels: Rivetted in pairs, toes face-to-face with spacers.
• Crossings: One set at 450-600 mm height; clear space between sets ≤ 150 mm.
• Edges: Trimmed; locking eyes & handles welded or rivetted.
• Roller wheels: Fitted in channels as per Table 1.

2. Rivets (Clause 5.6)

• Diameter ≥ 6 mm, snap-headed.
• Conform to IS 2155-1962.

3. Finishing (Clause 6.7)

• Apply red oxide primer as per IS 102-1962 on fabricated parts.

4. Roller Wheels Specification (Clause 6.3, Table 1)

flowchart TD
    A[Start Fabrication] --> B[Assemble vertical channels in pairs]
    B --> C[Insert crossings at 450-600mm height]
    C --> D[Maintain ≤150mm clear space between crossing sets]
    D --> E[Trim edges]
    E --> F[Weld/Rivet locking eyes & handles]
    F

IS 10521 - Additional Fixtures: Key Specifications

1. Additional Fixtures (Clause 7.1 & 6.5):

   • Suitable holding fixtures must be provided to fix end channels at the face of openings.
   • These fixtures ensure proper alignment and secure installation of door/window components.

2. Finishing (Clause 6.7):

   • Fabricated parts must be coated with red oxide primer conforming to IS:102-1962 (ready mixed red lead priming paint).

3. Roller Wheels (Clause 6.3, Table 1):

Summary:

• Provide holding fixtures for end channels.
• Use red oxide primer as per IS:102.
• Select roller wheels based on panel width/type with specified size, quantity, and ball bearing usage.

flowchart TD
    A[Panel Width & Type] --> B{Select Roller Wheel Size}
    B -->|Up to 1.0 m single| C[40 mm, 2 wheels, No ball bearing]
    B -->|1.0-1.5 m single| D[40 mm, 3 wheels,

IS 10521 - Information to be Supplied by the Purchaser (Clause 8.1 & Table 1)

When placing an order for collapsible gates, the purchaser must provide:

• Dimensions: Height and width of the gate
• Type: Specific type of collapsible gate
• Construction Details: Surrounding construction at the opening
• Roller Wheels: Position (bottom or top runner) and ball bearing requirement

Key Table: Roller Wheel Requirements (Clause 6.3)

Notes:

• Roller wheel size and quantity increase with gate width and panel type.
• Ball bearings are mandatory for wider double panels (>2.0 m).
• Final test values should be rounded as per IS 2:1960.

flowchart TD
    A[Purchaser] --> B[Provide Gate Dimensions]
    A --> C[Specify Gate Type]
    A --> D[Construction Details]
    A --> E[Roller Wheel Position & Ball Bearing]
    E --> F{Gate Width & Panel}
    F -->|Up to 1.0 m single| G[2 wheels, 40mm, No bearings]
    F -->|>1