Link points to Internet Archive / others. Not hosted by InfraLens. Details
IS 6198:1992 is the Indian Standard (BIS) for ledged braced and battened timber door shutters. This standard specifies the material, dimensional, and constructional requirements for ledged, braced, and battened timber door shutters. It provides guidelines for selecting timber, hardware, and finishes to manufacture durable and functional doors of this type, which are commonly used in utility buildings, garages, and rural construction.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! The direction of the diagonal brace is critical for preventing the door from sagging. It must run upwards from the bottom hinge side to the top latch side to act in compression.
! Ensure timber is properly seasoned to the moisture content specified in IS 287 for the building's location to prevent warping and splitting after installation.
! For external doors, specify tongued and grooved joints between battens for better weather resistance and select a durable timber species with appropriate protective finishes.
Details high-grade custom wood door fabrication, but focuses on stile-and-rail or flush doors, not this specific rustic construction.
Key Differences
≠IS 6198 is highly prescriptive, defining specific component dimensions, whereas modern international standards are performance-based, specifying outcomes like strength and durability rather than how to build it.
≠IS 6198 specifies a fixed list of permissible Indian timber species. International standards like BS EN 942 use a classification system for timber properties, allowing any suitable species that meets the required class for appearance and durability.
≠The Indian standard permits clenched wrought iron nails, a traditional fixing method. Modern international best practice and standards like AWI would mandate corrosion-resistant screws or engineered fasteners for superior holding power and longevity.
≠The IS code gives a broad moisture content range (12% ± 3%). International standards tie the required timber moisture content to the Equilibrium Moisture Content (EMC) of the final installation environment, which is a more precise approach to prevent warping.
Key Similarities
≈The fundamental construction of using vertical battens, horizontal ledges, and diagonal braces is a universally recognized and historically shared method for creating a simple, functional timber door.
≈Both the Indian standard and international joinery principles mandate that the diagonal brace must run upwards from the hinge side to the lock side to effectively counteract gravitational sag.
≈A core similarity is the requirement for sound, seasoned timber free from defects like decay, active insect infestation, or large, loose knots that would compromise the door's structural integrity and appearance.
≈All approaches recognize that the ledges and braces are the primary structural elements, while the vertical battens (boarding) primarily serve as the infill or cladding.
Parameter Comparison
Parameter
IS Value
International
Source
Timber Moisture Content
12% ± 3% (9% to 15%)
Varies by service location (e.g., 6-11% for interior dry, 9-14% for exterior)
AWS, Ed. 2 / BS EN 942
Batten (Boarding) Thickness
25 mm (for shutters ≤ 1m wide); 40 mm (for shutters > 1m wide)
Not prescriptively defined; typically 19-25 mm (3/4" to 1") based on application
General Joinery Practice (ref. BS 1186-2 principles)
Brace Angle
Approximately 45 degrees
Determined by geometry; should connect corners of the area formed by ledges
General Joinery Practice
Ledger Width
150 mm to 200 mm
Not prescriptively defined; sized based on door dimensions and structural need
General Joinery Practice
Timber Quality Grading
Prescribed list of Indian species and defect limits.
Appearance-based classification system (e.g., Class J2, J5, J10)
BS EN 942:2019
Fasteners for Assembly
Wrought iron nails (may be clenched) or screws.
Corrosion-resistant screws are standard; nails are largely deprecated in quality joinery.
AWS, Ed. 2
⚠ Verify details from original standards before use
Key Values6
Quick Reference Values
Maximum width of a single batten125 mm
Typical nominal thickness of battens20 to 40 mm
Typical width of ledges and braces150 to 200 mm
Brace inclination angleApproximately 45 degrees
Permissible timber moisture content (Typical, Zone III)12 % (as per IS 287)
Minimum end lap of brace into ledge25 mm
Tables & Referenced Sections
Key Tables
Table 1 - Preferred Sizes for Ledged, Braced and Battened Timber Door Shutters
The brace is a compression member that prevents the door from sagging under its own weight by transferring the load from the latch side to the hinge side (Clause 5.3).
What is the maximum recommended width for a batten?+
The width of a single batten should not exceed 125 mm to minimize the effects of shrinkage and expansion (Clause 4.3).
What kind of joints are specified between the vertical battens?+
The battens must be joined using tongued and grooved joints, which may be V-jointed on one or both sides (Clause 5.2).
How are the ledges and braces attached?+
They are typically attached to the battens using wood screws or bolts and nuts, after being housed into the battens (Clause 5.1, 5.3).