IS 273 : 2019

Sash Balances (Spring Type)

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CurrentSpecializedSpecificationArchitectural · Builder Hardware
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Summary

IS 273 covers spring-type sash balances that counterbalance the weight of vertical sliding window sashes, enabling smooth operation without pulleys or weights.

Specification for spring type sash balances used in vertical sliding windows covering types, sizes, load capacity, and testing.

Key Values
Cycle lifeMin 10,000 cycles
Practical Notes
! Select sash balance based on window sash weight — undersized balance makes window hard to open/stay open.
! Spring balances have largely replaced traditional cord-and-weight systems in modern windows.
Cross-Referenced Codes
IS 1038:1994Steel Doors, Window and Ventilator Frames
→
IS 14286:2019Unplasticized PVC Doors and Windows
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sash balancespring balancesliding windowwindow hardware