Glossary of terms relating to doors

IS 10428 - Scope & Key Specifications

IS 10428 covers steel doors, windows, ventilators, and partitions with detailed dimensional and component definitions.

Key Terms (Clause 2):

• Structural Opening (1): Void in wall/partition for doorset.
• Structural Reveal (11): Rebate or non-rebated opening edge.
• Vertical Side (13): Vertical frame sides.
• Structural Rebate (15), Depth (16), Width (17): Dimensions of rebate for door fitting.
• Finished Floor (18): Floor level reference.

Clearances (Clause 2.2.4):

• j. Joint clearance: Gap between door frame & door leaf.
• k. Clearance between door leaf & finished floor: Ensures smooth operation & prevents floor damage.

Dimensional Coordination:

• Modular & Non-modular sizes for walls/partitions to standardize openings.
• Letters with numbers (e.g., 1a, 1b) denote specific dimensional references.

Typical Dimensional Notations:

flowchart LR
    A[Structural Opening (1)]
    A --> B[Non-rebated Reveal (1a)]
    A --> C[Rebated Reveal (1b)]
    B --> D[Vertical Side (13)]
    C --> D
    D --> E[Structural Rebate (15)]
    E --> F[Depth (16)]
    E --> G[Width (17)]
    H[Door Leaf]
    I[Door Frame]
    I -- Joint Clearance (j) --> H
    H -- Clearance to Floor (k) --> J[Finished Floor (18)]

This scope ensures standardized door openings with proper clearances for installation and operation per IS 10428.

IS 10428: General Definitions Key Points

Clause 2.1 - Terms Relating to Components

• Structural Opening: Void in wall/partition to receive doorset.
• Structural Opening Types:
  • Non-rebated reveal (Fig.1)
  • Rebated reveal (Fig.2)
• Structural Reveal: The edge (rebated or non-rebated) of the opening.
• Vertical Side: Upright edges of the opening.
• Structural Rebate: Step or recess around opening.
• Depth & Width of Rebate: Dimensions of the rebate recess.

Clause 2.2 - Terms Relating to Dimensions

• Letters + numbers indicate work sizes.
• Other Dimensions:
  • j: Joint clearance between door frame & door leaf.
  • k: Clearance between door leaf & finished floor.

Annex: Illustrations

• Figures show structural openings, door frames, and modular/non-modular coordinating sizes.

Summary Table of Key Dimensions

flowchart LR
  A[Wall/Partition] --> B[Structural Opening]
  B --> C{Reveal Type}
  C --> D[Non-rebated Reveal]
  C --> E[Rebated Reveal]
  B --> F[Door Frame]
  F --> G[Door Leaf]
  G -->|Clearance j| F
  G -->|Clearance k| Floor[Finished Floor]

This concise framework helps in understanding door openings and clearances per IS 10428.

IS 10428 - Key Terms & Dimensions for Door Components

1. Terms Relating to Components (Clause 2.1)

• Structural Opening: Void in wall/partition to receive doorset.
• Structural Opening Types:
  • Non-rebated reveal (Fig. 1)
  • Rebated reveal (Fig. 2)
• Structural Reveal: The reveal can be rebated or non-rebated.
• Vertical Side: Vertical edges of the opening.
• Structural Rebate: Step or offset in the frame to receive door leaf.
• Depth & Width of Rebate: Dimensions defining rebate size.
• Finished Floor: Surface level where door leaf clearance is measured.

2. Terms Relating to Dimensions (Clause 2.2)

• j (Joint clearance): Clearance between door frame and door leaf.
• k (Clearance from door leaf to finished floor): Ensures smooth operation without floor contact.

3. Illustrations (Annex)

• Figures depict:
  • Structural openings with rebated/non-rebated reveals.
  • Door frames and their relation to walls/partitions.
  • Modular and non-modular coordinating sizes.

Summary Table of Key Dimensions

flowchart LR
  A[Structural Opening] --> B[Rebated Reveal]
  A --> C[Non-Rebated Reveal]
  B --> D[Structural Rebate]
  D --> E[Depth & Width of Rebate]
  A --> F[Door Frame]
  F --> G[Joint Clearance (j)]
  F --> H[Floor Clearance (k)]

This concise terminology and dimension guide helps in standardizing door component design per IS 10428.

IS 10428: Key Terms & Dimensions for Structural Openings

Structural Openings (Clause 2.1.1 & Annex)

• Structural Opening: Void in wall/partition for doorset.
• Types:
  • Non-rebated reveal (Fig. 1)
  • Rebated reveal (Fig. 2)
• Key Dimensions:
  • Vertical side (13)
  • Structural rebate (15)
  • Depth of rebate (16)
  • Width of rebate (17)
  • Finished floor (18)

Door Frames (Clause 2.1.2)

• Door Frame Types:
  • With rebate (Fig. 3)
  • Without rebate (Fig. 4)
  • With transom (Fig. 5)
• Key Dimensions:
  • Door frame reveal (20)
  • Depth of rebate (26)
  • Width of rebate (27)

Other Dimensions (Clause 2.2.3 & 2.2.4)

Practical Notes:

• Rebate is a step or groove in the frame or opening allowing the door to close flush.
• Joint clearance (j) ensures smooth door operation.
• Clearance to floor (k) prevents door scraping.

flowchart TB
    A[Wall/Partition] --> B[Structural Opening]
    B --> C[Door Frame]
    C --> D[Door Leaf]
    B -.-> E[Structural Reveal (Rebated/Non-Rebated)]
    C -.-> F[Door Frame Reveal]
    D -.-> G[Clearances: Joint (

IS 10428: Terms Relating to Door Frames

Key Definitions (Clause 2.1.2)

• Door Frame: Frame in which the door leaf is hung.
• Types of Door Frames:
  • With Rebate: Door frame has a stepped edge (rebate) for door seating (Fig. 3).
  • Without Rebate: Plain door frame without stepped edge (Fig. 4).
  • With Transom: Door frame with a horizontal bar above the door (Fig. 5).
• Rebate Dimensions:
  • Depth of Rebate (26)
  • Width of Rebate (27)
• Door Frame Reveal (20): The visible part of the frame, rebated or non-rebated.
• Butt Type Door Frame: Hinged type (see Figs. 10-12, 14-16).
• Wrap Around Door Frame: Frame with trim wrapped around (Figs. 13, 17).

Other Terms (Clause 2.2.4)

• Joint Clearance (j): Gap between door leaf and frame.
• Floor Clearance (k): Gap between door leaf and finished floor.

Typical Dimensions (Recommended)

Visual Summary

flowchart TD
    A[Structural Opening] --> B[Door Frame]
    B --> C[With Rebate]
    B --> D[Without Rebate]
    B --> E[With Transom]
    C --> F[Depth & Width of Rebate]
    B --> G[Reveal (Rebated/Non-Rebated)]
    B --> H[Butt Type]
    B --> I[Wrap Around Type]

For detailed figures, refer to IS 10428 illustrations (Figures 1-17).

IS 10428: Key Terms & Specifications for Doors

1. Terms Relating to Doors (Clause 2.1.3)

• Internal Door (31): Door with both faces inside the building.
• External Door (32): Door with at least one face exposed outside.
• Square Edge Door (33): Door leaf with square edges.
• Rebated Door (34): Door leaf with a stepped edge to overlap frame.
• Square Edge Overpanel (38a) / Rebated Overpanel (38b): Panels above doors matching door edge style.

2. Terms Relating to Door Frames (Clause 2.1.2)

• Door Frame: Frame where door leaf is hung.
• Types:
  • With rebate (2a)
  • Without rebate (2b)
  • With transom (2c)
• Dimensions:
  • Door frame reveal (20): Visible frame part.
  • Depth of rebate (26) & Width of rebate (27): Rebate dimensions.
• Frame Types:
  • Butt type (Figures 10-16)
  • Wrap-around type (Figures 13,17) — only with trim.

3. Other Dimensions (Clause 2.2.4)

• Joint clearance (j): Gap between door leaf and frame.
• Clearance to finished floor (k): Gap between door leaf bottom and floor.

Summary Table of Key Dimensions

Visual Concept (Door Frame with Rebates)

flowchart LR
    A[Structural Opening] --> B[Door Frame]
    B --> C[Rebate (Depth & Width)]
    C --> D[Door Leaf (Square or Rebated)]
    D --> E[Joint Clearance (j)]
    D --> F[Clearance to Floor (k)]

This standard aligns with ISO 1804-1972 and provides modular sizes for coordination. For

IS 10428: Terms Relating to Dimensions (Clause 2.2 & Annex)

• Letters with numbers denote work sizes (e.g., A1, A2...).

Key Dimension Terms (Clause 2.2.4)

Structural Openings (Clause 2.1.1 & Annex Figures)

• Structural Opening: Void in wall/partition to receive doorset.
• Types:
  • Non-rebated reveal (Fig. 1)
  • Rebated reveal (Fig. 2)
• Key dimensions:
  • Structural reveal (rebated/non-rebated)
  • Vertical side height
  • Structural rebate width & depth
  • Finished floor level reference

Typical Dimension Definitions

Visual Summary (Mermaid Diagram)

graph TD
  A[Structural Opening] --> B[Non-rebated Reveal]
  A --> C[Rebated Reveal]
  B --> D[Vertical Side]
  C --> D
  D --> E[Structural Rebate]
  E --> F[Depth of Rebate]
  E --> G[Width of Rebate]
  A --> H[Joint Clearance (j)]
  A --> I[Clearance to Floor (k)]

These terms ensure uniformity in door and frame dimensions for modular coordination per IS 10428.

IS 10428: Co-ordinating Heights & Dimensions for Door Frames

Key Terms & Dimensions (Clause 2.2)

Other Dimensions (Clause 2.2.4)

Width & Depth (Clauses 2.2.2 & 2.2.3)

Practical Notes:

• Co-ordinating heights (d, d2, d3) ensure proper fitting and clearance between structural openings, frames, and doors.
• Clear opening height (d'2) is critical for usability and accessibility.
• Joint clearance (j) typically ranges from 2-5 mm for smooth operation.
• Floor clearance (k) varies but usually is 10-20 mm to avoid floor friction.

Visual Summary (Mermaid Diagram

IS 10428 — Key Formulas & Specifications for Co-ordinating Widths

1. Terminology (Clause 2.2.2: Widths)

2. Key Relationships

• Co-ordinating Width (e):

  [ e = e2 + e3 + j ]

  Where:

  • ( e2 ) = Door frame reveal width
  • ( e3 ) = Door leaf width inside frame
  • ( j ) = Joint clearance between frame and door leaf (Clause 2.2.4)

• Clear Opening Width (e2'):

  [ e2' = e2 - g ]

  Where:

  • ( g ) = Width of rebate

• Structural Reveal Width (B1):

  [ B1 = B2 + 2 \times \text{wall thickness allowance} ]

  (Wall thickness allowance depends on construction)

3. Joint Clearances (Clause 2.2.4)

• ( j ) = Clearance between door frame and door leaf (typically 2-4 mm)
• ( k ) = Clearance between door leaf and finished floor (typically 10-20 mm)

4. Summary Table

5. **Illustration (Mermaid Diagram

IS 10428 - Key Formulas & Specifications for Depths and Thicknesses

Depths and Thicknesses (Clause 2.2.3)

Other Dimensions (Clause 2.2.4)

Heights (Clause 2.2.1)

Notes:

• Structural Opening: Void in wall/partition for doorset (Clause 2.1.1).
• Rebated vs Non-Rebated Reveal: Structural reveal depth (C1) varies accordingly.
• Joint clearance (j) typically ranges 3-5 mm to allow smooth operation.
• Floor clearance (k) depends on flooring type but usually 10-20 mm for ventilation.

Visual Summary (Mermaid Diagram)

graph TD
  A[Structural Opening]
  A -->|Depth C1| B[Structural Reveal]
  B -->|Thickness C2| C[Door Frame]
  C -->|Thickness f3| D[Door Leaf]
  C -->|

IS 10428 - Other Dimensions Key Points

Joint Clearances (Clause 2.2.4)

• j: Clearance between door frame and door leaf (important for smooth operation & expansion).
• k: Clearance between door leaf and finished floor (prevents rubbing and allows for floor finishes).

Dimension Terms (Clause 2.2)

Notes:

• These dimensions ensure modular coordination for door manufacturing and installation.
• Clearances j and k are critical for door functionality and durability.

flowchart LR
    A[Structural Opening] --> A1[Height of Structural Reveal]
    A --> B1[Width of Structural Reveal]
    A1 --> A2[Height of Door Frame]
    B1 --> B2[Width of Door Frame]
    A2 --> d[Height between Frame & Leaf]
    B2 --> e[Width between Frame & Leaf]
    d --> d3[Height of Door Leaf]
    e --> e3[Width of Door Leaf]
    d3 --> d'3[Door Leaf Height with Lipping]
    e3 --> e'3[Door Leaf Width with Lipping]
    B2 --> g[Width of Rebate]
    e --> j[Joint Clearance Frame-Leaf]
    d3 --> k[Clearance Leaf-Floor]

This structure helps in precise door design and installation

IS 10428: Illustration of Terms – Key Points

1. Terms Relating to Structural Openings (Clause 2.1.1)

• Structural Opening: Void in wall/partition to receive doorset.
• Types:
  • Non-rebated reveal (Fig. 1)
  • Rebated reveal (Fig. 2)
• Structural Reveal: The visible edge of the opening (rebated or non-rebated).
• Vertical Side: Upright sides of the opening.
• Structural Rebate: Step or groove in the reveal for door fitting.
• Depth & Width of Rebate: Dimensions of the rebate groove.
• Finished Floor: Final floor level relative to door leaf.

2. Terms Relating to Dimensions (Clause 2.2)

• j (Joint Clearance): Clearance between door frame and door leaf.
• k (Floor Clearance): Clearance between door leaf and finished floor.

3. Modular & Non-Modular Sizes

• Structural openings and door frames are designed with modular coordination for standardization.

Summary Table of Key Dimensions

flowchart TB
    A[Structural Opening]
    A --> B[Non-rebated Reveal]
    A --> C[Rebated Reveal]
    B --> D[Vertical Side]
    C --> E[Structural Rebate]
    E --> F[Depth of Rebate]
    E --> G[Width of Rebate]
    A --> H[Finished Floor]
    H --> I[Clearance k (door leaf to floor)]
    A --> J[Door Frame]
    J --> K[Joint Clearance j (frame to door leaf)]

This illustration helps visualize door frame and opening terminology per IS 10428.