Dimensions for unique shapes of clay bricks
1992 Edition

Overview of standardized brick dimensions as per IS 6165 (1992) for special clay brick shapes.

• Standard brick sizes outlined (Clause 3.1):

• Special brick shapes detailed in Clause 3.2 and illustrated in Figures 1 through 7, including:

  • Half Round Coping
  • Saddle Back Coping
  • Bullnose variations (single, double, mitre, stretcher)
  • Corner bricks (plinth headers, internal/external returns)
  • Culvert bricks (10 cm and 20 cm sizes)
  • Chimney or well headers and stretchers

• All measurements are in millimeters.

• Standard Mark ensures adherence to BIS quality and inspection standards.

IS 6165 references key Indian Standards for clay bricks:

• IS 1077:1991 – Common burnt clay building bricks
• IS 2180:1988 – Heavy duty burnt clay building bricks (third revision)

Brick dimensions (Clause 3.1 & 3.2):

Special shapes encompass bullnose, plinth, culvert, and chimney bricks with dimensions detailed in Figures 1 to 7.

The Standard Mark is governed by BIS Act 1986, ensuring quality through ongoing inspection and surveillance.

IS 6165 defines the standard sizes for special clay brick shapes to ensure uniformity and compatibility.

• Purpose: To standardize dimensional requirements for special brick shapes during production.
• Scope: Applies to bricks used in building and civil engineering masonry.

Common special shapes include:

• Queen closer
• King closer
• Bullnose bricks
• Coping bricks
• Chamfered bricks
• Cant bricks

Typical dimensions (based on modular brick size 190×90×90 mm):

Dimensions facilitate fitting without on-site cutting. Tolerances follow IS 1077.

Defined standard brick dimensions (Clause 3.1):

• Modular bricks are smaller with uniform sizes suitable for modular construction.
• Non-modular bricks have larger dimensions, consistent with traditional sizes.

Special shapes such as bullnose, coping, plinth, corner, culvert, and chimney bricks conform to these sizes with detailed dimensions in Figures 1-7.

IS 6165 specifies exact dimensions for special brick shapes ensuring consistent manufacture.

• Modular bricks: 190 × 90 × 90 mm
• Non-modular bricks: 230 × 110 × 70 mm

Special shapes like frogs, coping, and bullnose bricks are designed to fit these base dimensions, maintaining proper bonding and structural integrity.

Bullnose bricks feature rounded edges for aesthetic and functional use in corners and window sills.

Dimensions correspond to modular or non-modular sizes:

Bullnose types include single bullnose, double bullnose, mitre, stretcher, and elliptical curves as per Figure 3.

Used to provide smooth rounded masonry edges.

Corner bricks are specially shaped for use at masonry corners to ensure proper bonding without on-site cutting.

Standard dimensions:

Types include external corner, internal corner, and plinth internal/external returns as illustrated in Figure 4.

Manufactured under BIS quality controls conforming to IS 1077.

Plinth bricks are used in the plinth course for structural strength and aesthetic finish.

Dimensions adhere to modular and non-modular sizes:

Special shapes include plinth headers, stretchers, and internal/external returns detailed in Figure 5.

Conformity to IS 1077 and IS 2180 is required, with Standard Mark certification.

Culvert bricks are specialized shapes designed for constructing drainage and culvert structures.

Standard brick sizes apply:

Culvert bricks 6A (10 cm) and 6B (20 cm) have dimensions illustrated in Figure 6.

They enable curved constructions in civil engineering works and must meet BIS quality standards.

Special bricks for chimneys and well masonry are shaped for curved walls ensuring structural integrity.

Standard sizes:

Two main types detailed in Figure 7:

• Chimney or well headers
• Chimney or well stretchers

These bricks ensure proper bonding and curvature in circular constructions.

The Standard Mark certifies bricks conforming to IS 6165, enforced through BIS inspection and testing.

Manufacturers must maintain a rigorous quality control system with continuous surveillance by BIS.

Key elements include:

• Regular dimensional inspection and testing per IS 1077 and IS 2180.
• Marking only on licensed products.
• Documentation of production and quality records.

This ensures consistent quality and compliance with the standard.

Use of the Standard Mark signifies compliance with IS 6165, granted under the Bureau of Indian Standards Act, 1986.

Manufacturers must obtain a license from BIS to apply the Standard Mark, subject to ongoing conformity assessments.

The licensing process involves evaluation, granting permission, and continuous monitoring to assure product quality.

Contact details for BIS headquarters in New Delhi are provided for licensing inquiries.

IS 6165 undergoes periodic review and amendment to stay current with industry needs.

Users must ensure access to the latest edition and all amendments.

The standard includes tables listing amendments, and users are advised to consult BIS for updates.

Copyright is held by BIS, and reproduction requires permission except for implementation purposes.