The 1973 edition of IS 1200 Part 10 defines a uniform approach for measuring ceilings and linings in building and civil engineering projects. It outlines detailed procedures for quantifying materials, workmanship, and installation practices, facilitating precise estimation and billing. This standard is indispensable for professionals involved in accurate quantity determination for ceiling and lining works.
Overview
The 1973 edition of IS 1200 Part 10 defines a uniform approach for measuring ceilings and linings in building and civil engineering projects. It outlines detailed procedures for quantifying materials, workmanship, and installation practices, facilitating precise estimation and billing. This standard is indispensable for professionals involved in accurate quantity determination for ceiling and lining works.
Audience
Contents
Structure
This section defines the measurement methods for ceilings and linings in building and civil engineering projects, specifying that Bills of Quantities must comprehensively describe materials, thickness, workmanship, and fixing techniques. Supporting framework components are measured separately unless otherwise noted. Final figures are rounded according to IS 2-1960, maintaining consistent significant figures.
Outlined here are essential rules including the requirement to detail materials and workmanship in Bills of Quantities, the necessity to specify material types, thickness, and fixing methods, and the protocol for including patterned work descriptions. Measurements are typically rounded to the nearest 10 mm or 0.01 m² as applicable.
This part discusses when and how items can be clubbed together based on conformity with item descriptions. It emphasizes detailed breakup agreements and includes activities such as delivery, handling, fabrication, and finishing labor. Special provisions apply for circular surface work and associated cutting waste.
Dimensions must always be documented in the order of length, breadth (width), and height (or thickness), with a precision of 0.01 m. Openings up to 0.4 m² are not deducted, whereas larger openings require full area deductions and separate labor measurement.
Each item’s description must include conveyance, delivery, handling, storage, fabrication, hoisting, and finishing labor. Supporting members are measured independently. Bills of Quantities must accurately represent materials and workmanship.
Measurements are recorded as net quantities using the decimal system, with dimensions taken to the nearest 0.01 m. Rounding follows IS 2-1960 to maintain the required significant figures, ensuring accuracy for ceilings and linings in various construction works.
Bills of Quantities must fully describe materials and workmanship, reflect net measurements in decimal units, and apply proper rounding rules. Typical measurement units include square meters for ceiling and lining areas and millimeters or centimeters for thickness.
This section reiterates measurement units and precision requirements, emphasizing net decimal measurements recorded after fixing, with rounding as per IS 2-1960. Only fixed-in-place dimensions are considered.
Materials such as gypsum boards, plywood, and metal sheets are specified along with their thickness and number of layers. Fixing methods including screws, nails, and adhesives must be recorded. Supporting members are measured separately.
Work executed in particular patterns must be clearly identified. Circular surfaces are measured separately and, if fixed with screws, this detail is noted. Straight or angled cuts and waste are incorporated into the primary item.
Except when otherwise stated, measurement is done as flat surface areas in square meters, with curved surfaces measured separately. Net areas are rounded to the nearest 0.01 m².
No deduction is made for openings less than or equal to 0.4 m², but openings larger than this require full area deduction from measurements, with labor for forming such openings measured separately.
Boards up to 15 cm in width fixed on curved surfaces are measured separately, including the preparation of edges for fitting. Edge finishing such as chamfering and V-groove cutting is measured in running meters.
Circular cuts and waste are measured in running meters, specifying thickness and material type. Work on circular surfaces is measured separately, with fixing details noted. Edge finishing on fibre boards is also measured in running meters.
Cover fillets are measured in running meters, with full details of material, width, thickness, and edge treatment such as chamfering or rounding. Mitring at joints is included. Separate measurement applies for curved surfaces and sealing joints.
Frequently Asked
Fibre boarding is measured in square meters, specifying the type, number of layers, thickness, and fixing method. Fibre boards fixed to curved surfaces with widths not exceeding 15 cm are measured separately, including edge preparation. V-grooves and chamfering are quantified in running meters. Sealing joints are also measured in running meters with a description of the sealing technique applied.
Openings up to 0.4 square meters are included in the main measurement without any deduction or separate measurement for forming these openings. For openings exceeding 0.4 square meters, the full area is deducted from the ceiling or lining measurement, and the labor involved in creating these openings is measured and paid for separately.
Measurements must include the area in square meters, the type of insulation material, number of layers, thickness of each layer, and the fixing method such as adhesives or mechanical fasteners. Sealing joints are measured in running meters with a description of the sealing method. Circular cuts and waste are measured separately in running meters, specifying material thickness and type.
Curved or circular ceilings should be measured by their true curved surface area, not by projected horizontal dimensions. This involves calculating arc lengths and multiplying by width or height using geometric formulas. For cylindrical surfaces, the area is computed by multiplying the circumference by the height or width, ensuring accurate representation of curved geometries.
All final measurement values are rounded off following IS 2-1960 rules, maintaining the same number of significant figures as the original specified values. Numbers less than 5 in the digit following the last significant figure are left unchanged, while digits 5 or greater cause the last significant figure to increase by one. This ensures consistency and precision in reporting quantities.
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