IS 1729:1964 is the Indian Standard (BIS) for cast iron grating with frame for drainage purposes. This standard lays down the specifications for the material, dimensions, weights, and manufacturing quality of cast iron gratings with frames used for surface drainage purposes.
Specifies requirements for cast iron gratings with frames used for drainage purposes, including floor traps and gully traps.
Overview
- Status
- Current
- Usage level
- Frequently Used
- Domain
- MEP — Drainage, Sewerage and Sanitary Fittings
- Type
- Specification
Also on InfraLens for IS 1729
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Always check the weight of incoming cast iron gratings on site; an under-weight grating often indicates thin casting and structurally weak material.
! Ensure the grating sits flush within its frame without rocking to prevent noise and point-loading failure under traffic.
! Verify the bituminous coating is uniform and intact to protect the cast iron from accelerated corrosion in aggressive drainage environments.
Frequently referenced clauses
cast ironbitumen coatinggrey iron
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values4
Quick Reference Values
material gradeConforming to Grade FG 150 of IS 210
weight tolerance± 5 percent
dimensional tolerance± 3 mm to ± 5 mm
coating materialBituminous or coal tar base paint
Tables & Referenced Sections
Key Tables
Table 1 - Standard Dimensions of Gratings
Table 2 - Standard Weights and Permissible Tolerances
Key Clauses
Clause 4 - Material Requirements
Clause 5 - Dimensions and Tolerances
Clause 6 - Manufacture and Workmanship
Clause 8 - Coating
Frequently Asked Questions3
What is the standard material used for these drainage gratings?+
Grey cast iron conforming to a minimum of Grade FG 150 as per IS 210.
What is the acceptable tolerance on the weight of the grating?+
The acceptable weight tolerance is typically ±5% of the standard specified weight.
How should the gratings be protected against corrosion?+
They must be thoroughly coated with a bituminous or coal tar based paint, applied hot or cold, after removing all rust and scale.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.