This standard outlines the specifications for solid core wooden flush door shutters with plywood facings, covering aspects like materials, construction, dimensions, and testing methods. It serves as a guideline for manufacturers, architects, engineers, and quality controllers involved in the design and production of these doors for various building types.
Overview
This standard outlines the specifications for solid core wooden flush door shutters with plywood facings, covering aspects like materials, construction, dimensions, and testing methods. It serves as a guideline for manufacturers, architects, engineers, and quality controllers involved in the design and production of these doors for various building types.
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Frequently Asked
As per the standard, only hardwood species classified under Group 2A and Group 2B of Annex B are permitted for stiles, rails, and lippings. These hardwoods are chosen based on their density and screw holding properties, including species such as Aini, Arjun, Bahera, Birch, Champ, Mango, Rosewood, Ebony, Gamari, Gurjan, and Padauk. Some species may require preservative treatment before use.
The standard permits cores made from any timber species referenced in Group 1 of Annex B, particle boards of FPT-1 or XPS type complying with IS 3087, medium density fibreboards as specified in the standard, blockboards, and composite cores combining blockboard with particle board or MDF. The core frame including lippings must have a width between 45 mm and 100 mm. Face panels are plywood or crossbands with veneers bonded on both sides by hot pressing, with crossband thickness ranging from 1 mm to 3 mm.
Standard door shutter sizes follow modular increments of 100 mm with widths ranging from 700 mm to 1100 mm and heights typically from 1905 mm to 2005 mm, with allowances for framing and flooring finishes. Thickness varies by shutter designation, generally between 25 mm and 35 mm. Tolerances for width and height are ±5 mm, squareness deviation is limited to 1 mm per 500 mm length, and thickness uniformity must not exceed 0.8 mm variation between two points.
Door shutters are required to pass various mechanical tests including impact resistance (25 blows on each end and 5 impacts on both faces), shock resistance, buckling tests limiting residual deformation to 5 mm after unloading, flexure, edge loading, and resistance to slamming and misuse. These tests ensure structural robustness and durability under typical operational stresses.
Glue adhesion is tested following IS 4020 Part 15, with visual inspection for delamination. The door shutter passes if there is no delamination or if any delamination present is less than 50 mm in length and 3 mm in depth in the assembly glue lines. Delaminations due to natural defects like knots or pitch pockets are disregarded. Adhesion quality is classified visually as excellent (strong bond, minimal visible glue line), acceptable (limited delamination within thresholds), or poor (easy veneer separation), with only the first two categories considered passing.
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