The standard IS 965:1963 defines equivalent metric units for scales, dimensions, and quantities widely used in general construction activities across India. It supports the shift from the fps system to the metric system by providing standardized conversions for measurements and materials in various building operations, promoting uniformity and clarity in metric terms.
Overview
The standard IS 965:1963 defines equivalent metric units for scales, dimensions, and quantities widely used in general construction activities across India. It supports the shift from the fps system to the metric system by providing standardized conversions for measurements and materials in various building operations, promoting uniformity and clarity in metric terms.
Audience
Contents
Structure
This section outlines the extent of IS 965, detailing the standardization of scales, dimensions, quantities, weights, and material strengths applicable to architectural and construction surveys and drawings. It includes specifications for survey scales such as topographic maps and working plans, standard dimensions for materials like flooring, roofing, hardware, and sanitary fittings, measurement methods for various construction tasks, and conversion factors from fps to metric units covering weights, densities, strengths, and structural properties.
Defines the types of working drawings including horizontal layouts (plans), vertical exterior/interior views (elevations), and sectional cuts to show internal structures. It recommends metric scales such as 1:200, 1:100, and 1:50 for different drawing types to ensure clarity and precision. Guidelines emphasize consistent line weights, clear annotations, and legibility of all dimension and material details.
Details metric unit conversions for walling components like stone blocks and bricks, replacing inch and foot measurements with millimeters and meters. Includes tables correlating traditional running feet and cubic foot units with metric meters and cubic meters for masonry and stonework, with notes on volume allowances for dressed finishes and labor estimates.
Lists the metric equivalents for commonly used hardware items such as expanded metal mesh sizes, wire lengths and diameters, steel bars, rivets, bolts, and rolled steel sections. It also covers conversions of weight units from cwt to quintals and area units from square feet to square meters, ensuring accurate quantity estimation for steel and iron works.
Specifies metric units for plastering and pointing work quantities, converting from 100 square feet or running feet in fps to convenient multiples of 10 square meters or meters. It provides practical guidance for measuring plaster bands, joint raking, and stone imitation work with thickness values in millimeters.
Covers material types such as lime, waste, earth, sand, bricks, cement, steel, and bitumen, specifying their carriage units in metric terms like cubic meters, tonnes, kilograms, and liters. Conversion tables from traditional tons, cwt, and pounds to metric units facilitate precise load calculations and transport planning.
Provides comprehensive conversion factors for weights, densities, compressive and tensile strengths, stresses, moments of inertia, and section moduli from fps units to metric units. Includes details on steel and iron work weights and lengths for standardized metric use in design and estimation.
Details conversions for diverse parameters such as aggregate sizes, timber dimensions, road lengths, and pressures. It highlights the importance of metrication, providing formulas and tables to convert fps values to metric units for various physical properties and construction materials.
Enumerates metric units corresponding to excavation and earthwork activities, including rough excavation, surface dressing, trenches, filling, embankments, planking, and puddling. It explains the rounding of metric units to convenient values to simplify calculations and ensure uniformity in project specifications.
Presents metric unit conversions for dimensions and quantities related to bricks, stone blocks, masonry around structural elements, and dressing works. It emphasizes consistent use of metric units for length, volume, and labor estimates to standardize masonry work measurements.
Lists metric equivalents for dimensions such as widths, thicknesses, volumes of frameworks, boarding surfaces, formwork, mouldings, fillets, and stair components. It provides conversion guidance from inches and feet to millimeters, centimeters, and meters for accurate timber work estimation.
Details metric equivalents for steel and iron components including plates, bars, beams, gates, railings, and fasteners. Covers weight and area conversions essential for quantifying materials in metric units for structural and fabrication works.
Specifies metric units for glazing area measurements and thicknesses of glass panes and panels. Conversion tables replace square feet and inch measurements with square meters and millimeters, ensuring uniformity in glazing specifications.
Provides metric conversions for paving areas, treads, risers, moulded nosings, surface finishes, skirting, building papers, and granular layers. It includes metric units for terrazzo, mosaic, brick paving, wood block paving, and asphalt finishes, facilitating consistent quantity assessments.
Lists basic metric conversion factors for weights, strengths, densities, pressures, moments, and various construction materials. It serves as a reference for converting from fps to metric units, supporting accurate calculations and standardization across construction disciplines.
Frequently Asked
IS 965 recommends metric scale equivalents to replace common fps scales in construction drawings. For example, a large-scale survey of 1 inch = 64 feet corresponds to 1 cm = 10 meters in metric. General detail scales like ½ inch = 1 foot (1:24) are replaced by 1 cm = 20 cm (1:20), and 1 inch = 1 foot (1:12) corresponds to 1 cm = 10 cm (1:10). Working drawings typically use metric scales of 1:200, 1:100, or 1:50 for clarity and accuracy. These conversions ensure a smooth transition while maintaining precision in design documentation.
According to IS 965, excavation and earthwork quantities traditionally measured in fps units are converted into simplified metric units for ease of use. For instance, rough excavation quantities given as 1000 or 100 cubic feet convert to 10 or 1 cubic meters respectively. Surface excavation, trenches, filling, and other earthwork items are assigned rounded metric units such as 10 square meters or cubic meters. This approach facilitates straightforward estimation and consistency in construction projects.
IS 965 suggests using metric units aligned with multiples of 10 for plastering and pointing works. General plastering and pointing areas are measured in 10 square meters, while linear works like pointing joints or beads use 10 meters. Thickness dimensions should be recorded in millimeters. These units replace the traditional 100 square feet or running feet units, providing standardized, easy-to-use metric measurements for accurate quantity calculations.
The standard specifies that various construction materials be quantified in metric units such as cubic meters for bulk materials (earth, sand, aggregates), tonnes or kilograms for heavier items (cement, steel sections), and liters or cubic meters for bituminous materials like tar. This metric quantification aligns with traditional fps-based units but uses rounded metric values to simplify transport planning and load computations, ensuring uniformity across project logistics.
IS 965 provides detailed conversion factors for weights and strengths, such as 1 ton to 1.016 tonnes, 1 cwt to 0.508 quintals, and 1 lb to 0.454 kg. Strength measures like compressive and tensile strengths convert from lb/in² to kg/cm² by multiplying by 0.070. It also covers conversions for moments of inertia, section moduli, and pressures. These factors enable accurate translation of mechanical and material properties from fps to metric units, ensuring consistency in design and analysis.
Ask AI about any clause, requirement, or provision in IS 965. Get instant, clause-cited responses powered by our indexed library.
Free tier includes 150 queries (50 AI + 100 Reference) · No credit card required