This code outlines the specifications for asbestos cement gutters and their associated fittings utilized in building structures for efficient rainwater drainage. It details aspects such as the material makeup, dimensional accuracy, physical properties, sampling procedures, impermeability testing, and marking protocols. The standard is crucial for producers, quality assurance personnel, and design engineers involved with asbestos cement rainwater management components.
Overview
This code outlines the specifications for asbestos cement gutters and their associated fittings utilized in building structures for efficient rainwater drainage. It details aspects such as the material makeup, dimensional accuracy, physical properties, sampling procedures, impermeability testing, and marking protocols. The standard is crucial for producers, quality assurance personnel, and design engineers involved with asbestos cement rainwater management components.
Audience
Contents
Structure
This section defines the extent of coverage for asbestos cement gutters, including valley, boundary wall, and half-round types, specifying dimensional criteria, permissible tolerances, and sampling requirements for quality control.
Lists important related Indian Standards and annexures, explains rounding rules as per IS 2:1960, and details dimensional requirements with corresponding figures and tables.
Provides definitions of gutter types and presents detailed dimensional tables for valley, boundary wall, and half-round gutters, including thickness specifications.
Outlines the required quality levels, dimensional compliance, and workmanship standards for the manufacturing of gutters and fittings.
Details the physical property requirements, dimensional tolerances, and the relevant tables for various gutter profiles.
Describes the sampling method based on lot size and the number of tests required to verify compliance with the standard.
Specifies the requirement for manufacturers to provide a certificate confirming conformity with dimensional tolerances, quality inspections, and referenced material standards.
Details mandatory marking information including manufacturer identity, product codes, manufacturing dates, and safety symbols as outlined in related standards.
Presents essential safety information, including proper rounding procedures for test results and packaging instructions to ensure safe handling.
Enumerates the supplementary Indian Standards referenced throughout the document essential for compliance.
Details the composition of the committee responsible for the standard, including industry representatives, government officials, and technical experts.
Frequently Asked
The materials permitted include clean, inert asbestos fibers combined with appropriate additional fibers. The cement types authorized are Ordinary Portland Cement (IS 269:1989, IS 8112:1989, IS 12269:1987 for 53 grade), Portland Slag Cement (IS 455:1989), Portland Pozzolana Cement (IS 1489 Parts 1 and 2:1991), and Rapid Hardening Portland Cement (IS 8041:1990). Additives like pozzolanic substances, fillers, and pigments compatible with asbestos cement may also be included. The mixture must be thoroughly blended to ensure homogeneity, and gutters should have smooth inner surfaces, passing both visual and impermeability assessments to guarantee durability and suitability for rainwater drainage.
The dimensional tolerances specified include a thickness variation of plus or minus 1.5 mm, a length deviation of plus or minus 10 mm, and profile tolerance within plus or minus 10 mm. All measurements are in millimeters, and the shapes and sizes must adhere to the figures and tables provided in the standard. Typical fastener holes are 10 mm in diameter, with slots measuring 10 by 20 mm where applicable. These tolerances ensure the proper fit and function of gutters and their fittings in construction applications.
Impermeability testing is conducted following Method 1 of IS 5913:1989. The test involves applying water to any appropriate area of the gutter without sectioning off a separate specimen and maintaining this condition for 24 hours. Successful gutters show no water droplets forming on the underside during this period, though minor moisture traces are acceptable. All gutters sampled per the standard's sampling clause must undergo this visual and impermeability inspection. The manufacturer is responsible for ensuring compliance and providing certification when requested.
According to the standard, all gutters and fittings must be permanently and clearly marked with the manufacturer's identification (name or trademark), the product code number, the date of manufacture, and pictorial warning symbols as specified by IS 12081 (Part 2):1987. Additionally, fittings should correspond dimensionally with the respective gutter sizes, conforming to specified shapes and sizes. Length tolerances of ±10 mm apply to both gutters and fittings to maintain compatibility and safety.
Gutters should be grouped into lots based on type, thickness, and manufacturing conditions. Random samples are then selected from each lot, with sample sizes determined by lot quantity: up to 500 units require 3 samples, 501-1,000 require 5, 1,001-1,500 require 7, and over 1,500 require 10 samples. The selected samples undergo impermeability testing per IS 5913:1989 Method 1, without cutting separate specimens. A lot passes if no water droplets appear underneath any tested gutter after 24 hours, allowing only traces of moisture. This process ensures reliable quality control and compliance with the standard.
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