IS 15973:2000 (Part 2) is the Indian Standard (BIS) for selection and use of various types of lignocellulosic panel products - code of practice, part 2: hardboards. This standard provides a code of practice for the selection, use, and application of different types of hardboards. It covers guidelines on handling, storage, conditioning, jointing, fixing, and finishing for various end-uses like furniture, panelling, and partitions to ensure satisfactory performance.
Selection and Use of Various Types of Lignocellulosic Panel Products - Code of Practice, Part 2: Hardboards
Overview
- Status
- Current
- Usage level
- Specialized
- Domain
- Materials Science — Wood and Other Lignocellulosic Products
- Type
- Code of Practice
Also on InfraLens for IS 15973
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Crucially, hardboards must be conditioned on-site for at least 48 hours to match the ambient moisture level before installation to prevent future warping or buckling.
! Always provide an expansion gap of approx. 2.5 mm per metre at joints and around the perimeter of panels to accommodate dimensional changes with humidity.
! For areas with high humidity (kitchens, bathrooms) or where higher strength is needed, specify 'Tempered Hardboard' as per Table 1.
Frequently referenced clauses
hardboardwoodlignocellulosic panelsfibreboard
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values6
Quick Reference Values
Minimum conditioning period before use48 hours
Recommended expansion gap2.5 mm per metre of board length/width
Maximum nailing spacing at edges100 mm
Maximum nailing spacing at intermediate supports200 mm
Minimum nailing distance from edge10 mm
Maximum bearer spacing for storage600 mm
Tables & Referenced Sections
Key Tables
Table 1: A Guide for the Selection of Hardboards for Various End-Uses
Key Clauses
Clause 5: Selection of Hardboards for End-Uses
Clause 6: Handling and Storage
Clause 7: Working, Jointing and Conditioning
Clause 8: Fixing
Clause 9: Finishing
Frequently Asked Questions4
How should hardboard sheets be stored on site?+
They should be stored stacked flat on a level surface, raised off the ground on bearers spaced no more than 600 mm apart, and protected from weather. (Clause 6.1)
What is the recommended nail spacing when fixing hardboard panels?+
Nails should be spaced at a maximum of 100 mm along the edges and 200 mm on intermediate supports. (Clause 8.3.1)
Is a gap required between hardboard panels during installation?+
Yes, an expansion gap of about 2.5 mm per metre of the board's dimension should be left at all butt joints to allow for movement. (Clause 7.2)
Which type of hardboard should be used for furniture?+
Standard or Tempered hardboard can be used, depending on the desired finish and strength. Tempered is better for surfaces requiring higher wear resistance. (Table 1)
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.