The 1989 edition of IS 808 outlines the standardized nominal measurements, weight, and sectional characteristics for hot rolled steel structural elements such as beams, columns, channels, and angles utilized in construction and engineering projects. It integrates various Indian Standard profiles including junior, light, medium, and heavy sections into one cohesive code. This standard is a vital reference for structural designers, engineers, and fabricators to achieve compatibility and cost-effective steel utilization in structural frameworks.
Overview
The 1989 edition of IS 808 outlines the standardized nominal measurements, weight, and sectional characteristics for hot rolled steel structural elements such as beams, columns, channels, and angles utilized in construction and engineering projects. It integrates various Indian Standard profiles including junior, light, medium, and heavy sections into one cohesive code. This standard is a vital reference for structural designers, engineers, and fabricators to achieve compatibility and cost-effective steel utilization in structural frameworks.
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Frequently Asked
The IS 808 standard defines nominal sizes and weights for different steel sections including beams, columns, channels, as well as equal and unequal leg angles. Specific dimension tables provide data on depth, flange width, web and flange thicknesses, sectional area, and mass per meter length for each type, ensuring uniformity and ease of selection for structural applications.
IS 808 categorizes steel sections under a steel economy programme into beams, channels, and angles, each subdivided based on weight and shape. Beam types include Junior (ISJB), Light (ISLB), Medium (ISMB), and Wide Flange (ISWB) beams. Channel sections are classified as Junior (ISJC), Light (ISLC), Medium (ISMC), and Medium Parallel Flange (ISMCP). Angles are divided into equal and unequal leg types. Designation combines the type prefix with nominal depth, for example, ISMB 300 indicates a Medium Weight Beam of 300 mm nominal depth.
The standard provides detailed sectional properties such as cross-sectional area (a), mass per meter length (M), moments of inertia about principal axes (Ix, Iy, Iu, Iv), radius of gyration (rx, ry), distances to extreme fibers (ex, ey), centroid coordinates (Cx, Cy), section moduli (Zx, Zy), and flange slope angle (α). These properties facilitate structural analysis and design calculations.
Yes. IS 808 specifies that heavier sections, often marked with an asterisk, are manufactured by spreading the same rolling profiles to increase flange width. When ordering these sections, it is essential to specify the exact mass due to dimensional variations. Some specialized sections such as SC 150* are designed for specific applications like railway electrification. Availability should be confirmed with Joint Plant Committee (JPC) or steel producers, as some sections are not currently rolled but may become available.
IS 808 fosters steel economy by standardizing a rational series of rolled steel sections optimized for strength-to-weight efficiency. The range includes junior, light, medium, wide flange, and heavy sections for beams, channels, and angles, designed to minimize steel consumption while meeting structural demands. This standardization aids manufacturers and designers in reducing waste, improving mass production, and ensuring cost-effective steel usage without compromising structural performance.
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