Steel Bars are round and square for structural and general engineering purposes
1989 Edition

Overview of Scope and Specifications

• Defines dimensions, cross-sectional areas, and weights for hot-rolled round and square steel bars.
• Dimensions and mass data are presented in Tables 1 and 2 for round and square bars, respectively.
• Cross-sectional areas and masses are rounded to three significant digits for precision.

Sample Data Table

Notes:

• Rolling and cutting dimensional tolerances comply with IS 1852:1985.
• BIS Standard Mark certification guarantees quality conformity.
• These tables assist in material selection, design, and procurement.

Cross-Sectional Area Calculation for Round Bars

[ A = \frac{\pi}{4} d^2 ] Where:

• ( A ) is area in cm²
• ( d ) is diameter in cm

Visual Flowchart Summary

flowchart LR
    A[IS 1732 Scope] --> B[Hot-Rolled Steel Bars]
    B --> C[Round Bars]
    B --> D[Square Bars]
    C --> E[Table 1: Diameter, Area, Mass]
    D --> F[Table 2: Side, Area, Mass]
    E & F --> G[Design Calculations & Quality Checks]

This provides a quick reference for design and quality control per IS 1732.

Primary References for Dimensions, Areas & Mass of Steel Bars

1. Cross-Sectional Area and Mass Details (Clauses 4.1 & 4.1.1)

• Values rounded to three significant figures.
• Refer to Tables 1 and 2 for complete size ranges.

2. Area Formulas

• For round bars:
  ( A = \frac{\pi}{4} d^2 ), where ( d ) is diameter in mm

• For square bars:
  ( A = a^2 ), where ( a ) is side width in mm

3. Mass Calculation

( \text{Mass} = A \times \rho ), with ( \rho = 7.85 , \text{g/cm}^3 ) (density of steel)

IS 1732: Steel Bar Designation, Dimensions and Weight

Designation System (Clause 3.1):

• Round bars use prefix ISRO followed by the diameter in mm (e.g., ISRO 10 for 10 mm diameter).
• Square bars use prefix ISSQ followed by side length in mm (e.g., ISSQ 10 for 10 mm side).

Key Tables (Clauses 4.1 & 4.1.1)

Calculation Formulas

• Round bar area:
  [ A = \frac{\pi}{4} d^2 ]
• Square bar area:
  [ A = a^2 ]
• Mass per meter:
  [ m = A \times \rho ] where ( \rho = 7.85 , g/cm^3 ) (density of steel)

Dimensional Tolerances (Clause 5.1)

• Rolling and cutting tolerances follow IS 1852:1985.

This system standardizes size, mass, and identification of hot-rolled steel bars for construction applications.

IS 1732 Specifications on Size and Mass of Hot-Rolled Steel Bars

Main Parameters (Clauses 4.1 & 4.1.1)

• Standard sizes and weights for round and square hot-rolled steel bars.
• Cross-sectional areas and weights per meter are tabulated in Tables 1 & 2.
• Values are rounded to three significant digits.
• Mass units are kg/m; areas in cm².
• Tolerances comply with IS 1852:1985 (Clause 5.1).

Sample Data

Important Calculations

• Cross-sectional area of round bars:

  [ A = \frac{\pi}{4} d^2 ]

• Approximate mass per meter:

  [ m = A \times \rho ]

  where ( \rho \approx 7.85 , \text{g/cm}^3 ) or 7850 kg/m³.

Tolerances for Hot-Rolled Steel Bars per IS 1732

Reference Standard:

• Rolling and cutting tolerances are regulated by IS 1852:1985.

Highlights from IS 1732:

• Clause 5.1: Rolling and cutting dimensions must adhere to limits specified in IS 1852.
• Cross-sectional areas and sizes for round and square bars are detailed in Tables 1 & 2.
• Measurements and mass values are rounded to three significant digits.

Typical Tolerance Ranges (From IS 1852:1985):

Note: Confirm exact tolerances from IS 1852:1985.

Example Cross-Sectional and Mass Data

Summary:

• IS 1852:1985 details all rolling and cutting tolerance requirements.
• IS 1732 provides standardized dimensions and mass data.