The IS 2191 Part 2 (1983) standard outlines the specifications for wooden flush door shutters featuring cellular and hollow cores with particle board and hardboard facing panels. It details the requirements for materials, dimensions, construction techniques, finishes, and testing protocols applicable to these door types, serving as a vital reference for manufacturers, suppliers, and technical professionals in India.
Overview
The IS 2191 Part 2 (1983) standard outlines the specifications for wooden flush door shutters featuring cellular and hollow cores with particle board and hardboard facing panels. It details the requirements for materials, dimensions, construction techniques, finishes, and testing protocols applicable to these door types, serving as a vital reference for manufacturers, suppliers, and technical professionals in India.
Audience
Contents
Structure
This section defines the extent of IS 2191 Part 2, focusing on wooden flush door shutters with cellular and hollow cores faced with particle board and hardboard. It includes modular sizing, classification, and dimensional tolerance requirements. The thickness for non-standard sizes must meet or exceed the nearest larger modular size.
Details types of flush door shutters based on core and face panel characteristics. The designation codes categorize doors by core type (cellular or hollow) and the nature of the face panel (decorative veneered, non-decorative unveneered, or commercially veneered).
Specifies modular dimensions for door shutters, including widths, heights, and thicknesses with allowed deviations. Tolerances for width, height, and thickness ensure dimensional precision for installation and performance.
Highlights the required materials, including medium density particle boards and hardboards, their minimum thicknesses for cellular and hollow core doors, and references to related IS standards. Emphasizes the importance of adherence to BIS certification.
Describes fabrication guidelines including size conformance, surface smoothness, uniform thickness, and workmanship standards necessary for producing quality flush door shutters.
Outlines instructions for preparing the door shutters to accommodate mortice locks and latches, including the provision and marking of wooden blocks sized according to maximum lock dimensions specified in IS standards.
Covers workmanship, finish quality, conformity to particle board grades, and BIS certification requirements ensuring product reliability and compliance.
Specifies finishing requirements such as smooth sanding of both faces, priming for painted doors, and adherence to IS standards for particle board and hardboard finishes.
Details the testing methods referenced from IS 2191 Part 1 for verifying dimensional stability, mechanical strength, surface finish, and durability under various environmental conditions.
Explains the requirements for legible and permanent marking of manufacturer details, the use of the BIS Standard Mark under licensing conditions, and the option to apply the ECO Mark for environmentally friendly products.
Though not explicitly detailed in the standard, general best practices for packaging and storage include protecting doors from moisture, flat stacking using pallets, use of waterproof coverings, and proper labeling for size, grade, and certification.
Frequently Asked
IS 2191 Part 2 mandates that wooden flush door shutters with particle board face panels must use particle boards of minimum 6 mm thickness for cellular core doors and 9 mm for hollow core doors, bonded with phenol formaldehyde adhesive and exhibiting swelling within 5%. Hardboard face panels require a minimum of 4 mm thickness for cellular cores and 6 mm for hollow cores, applied by hot pressing under pressure. These materials should comply with IS 3087-1965, IS 3097-1980, and environmental standards including ECO Mark certification.
The standard defines modular door shutter sizes with widths and heights in increments of 100 mm, such as 700 mm, 800 mm, 900 mm widths and corresponding heights like 1905 mm or 2005 mm, including alternate heights. Thicknesses vary with door designation from 25 mm up to 35 mm. Permissible dimensional tolerances are ±3 mm for width and height, and ±1.2 mm for thickness, with thickness variation not exceeding 0.8 mm between any two points.
Door shutters should be pre-fabricated in the workshop to allow for mortice lock or latch installation upon purchaser's request. This includes embedding special wooden blocks sized to fit the maximum lock dimensions specified by IS 2209-1976. Edges of the shutters must be square and free from warping to ensure proper hardware fitting. Surfaces should be smoothly sanded and primed if painting is intended.
Testing protocols reference IS 2191 Part 1 Clause 9, involving dimensional verification before and after conditioning, mechanical strength assessments, and surface finish inspections. Doors are conditioned at 20 ± 2°C and 65 ± 5% relative humidity for seven days, with dimensional changes restricted to a maximum of 0.5%. Visual checks confirm absence of warping, delamination, or cracking.
The BIS Standard Mark indicates that a product meets Indian Standard requirements for quality and safety. Its application is regulated under the Bureau of Indian Standards Act, 1986, requiring manufacturers to obtain a BIS licence. Products may also carry the ECO Mark if they satisfy additional environmental criteria. The marks assure consumers of compliance and product reliability.
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