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IS 2191:2000 (Part 1) is the Indian Standard (BIS) for wooden flush door shutters (cellular and hollow core type), part 1: plywood face panels. This standard lays down the requirements regarding material, dimensions, construction, workmanship, and testing of wooden flush door shutters of cellular and hollow core types with plywood face panels.
Wooden Flush Door Shutters (Cellular and Hollow Core Type), Part 1: Plywood Face Panels
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Cellular and hollow core doors are lightweight and cost-effective but are generally intended for interior use where security and severe weather resistance are not primary concerns.
! Always check the adhesive grade (e.g., BWP or MR) to ensure it matches the environmental exposure of the door's intended location, especially for wet areas like bathrooms.
! Ensure the timber frame is properly treated with preservatives and dried to the specified moisture content to prevent warping or delamination.
AWI 1300-2022Architectural Woodwork Institute (US)
HighCurrent
Architectural Wood Flush Doors
Specifies construction, materials, and performance of architectural wood flush doors, including hollow core types.
WDMA I.S. 1A-2013Window & Door Manufacturers Association (US)
HighCurrent
Architectural Wood Flush Doors
Provides standards for grades, construction, materials, and finishing of architectural wood flush doors.
AS 2688-2017Standards Australia (AU)
MediumCurrent
Timber and composite doors
Covers requirements for timber doors, including hollow-core flush doors, with a mix of performance and prescriptive criteria.
BS 4787-1:1980British Standards Institution (UK)
MediumWithdrawn
Internal and external wood doorsets, door leaves and frames - Part 1: Specification for dimensional requirements
Prescribed dimensional and constructional requirements for wood doors, similar in its prescriptive approach to IS 2191.
Key Differences
≠IS 2191 is highly prescriptive, defining exact minimum dimensions for stiles, rails, and core components. Modern standards like AWI 1300 and WDMA I.S. 1A are more performance-oriented, classifying doors into duty levels (e.g., Standard, Heavy, Extra Heavy Duty) based on performance test results.
≠IS 2191 explicitly specifies Indian timber species for the frame and core, and references Indian Standards for adhesives (IS 848) and plywood (IS 303). International standards reference their own regional material standards (e.g., ANSI/HPVA for plywood in the US).
≠IS 2191 specifies adhesive type based on resistance (Type 1 for boiling water, Type 2 for cold water). US standards like WDMA I.S. 1A classify adhesives as Type I (Waterproof) or Type II (Water-resistant) based on different ASTM test criteria.
≠Fire resistance is not within the scope of IS 2191-1 (it is covered in IS 3614). Comprehensive standards like AWI 1300 integrate requirements for fire-rated doors (e.g., 20-minute, 45-minute) within the same document.
Key Similarities
≈All standards define the fundamental construction of a flush door, comprising a core (hollow, cellular, or solid), a timber frame (stiles and rails), and face panels (e.g., plywood).
≈The concept of using internal lock blocks and other reinforcement blocks for hardware mounting is a common requirement across IS 2191 and its international counterparts.
≈All standards specify mandatory dimensional and visual tolerances, including for width, height, thickness, and squareness, to ensure proper installation and function.
≈The requirement for performance testing to verify structural integrity and durability is universal. IS 2191 includes Slamming, End Immersion, and Knife tests, while international standards use similar concept tests like cycle slam and adhesion tests.
Parameter Comparison
Parameter
IS Value
International
Source
Minimum stile width (Hollow Core)
45 mm for shutters up to 900 mm wide
1-1/8 inch (approx. 28.6 mm) for Standard Duty Grade
WDMA I.S. 1A-2013
Minimum plywood face panel thickness
3 mm
1/8 inch (approx. 3.2 mm) for 3-ply skins
WDMA I.S. 1A-2013
Overall thickness tolerance
±1.2 mm
±1/16 inch (approx. ±1.6 mm)
AWI 1300-2022
Squareness tolerance (diagonal difference)
Shall not exceed 4 mm
Shall not exceed 1/16 inch (approx. 1.6 mm) for Premium Grade
WDMA I.S. 1A-2013
Adhesive for exterior/boiling water resistance
Type 1 (BWR Grade) - Phenol Formaldehyde resin
Type I (Waterproof) adhesive
WDMA I.S. 1A-2013
Minimum lock block size
300 mm (length) x 100 mm (width)
5 inch (width) x 36 inch (length) minimum (approx. 127 mm x 914 mm) for institutional grade
AWI 1300-2022
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
standard thickness of shutters25, 30, 35, or 40 mm
tolerance on nominal width and height± 3 mm
tolerance on nominal thickness± 1.2 mm
squareness toleranceNot more than 2 mm for a 500 mm length
moisture content of timber8 to 15 percent (depending on climatic zone)