How many holdfasts are required for fixing a standard timber door frame?

A minimum of 6 holdfasts is required, typically 3 on each vertical member of the door frame.

What is the recommended operational clearance between the shutter and the frame?

A uniform clearance of approximately 3 mm should be provided to allow for smooth operation and seasonal expansion of the wood.

When is the best time to hang timber shutters during a building project?

Shutters should be hung only after the building is completely dry and wet works like plastering are finished to prevent moisture absorption.

IS 4913

: 1968

Code of Practice for Selection, Installation and Maintenance of Timber Doors and Windows

CurrentSpecializedCode of PracticeBIMArchitectural · Doors, Windows and Shutter

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This standard provides comprehensive guidelines for the proper selection, safe storage on site, accurate installation, and routine maintenance of timber doors and windows to ensure their longevity and proper functional performance.

Code of Practice for Selection, Installation and Maintenance of Timber Doors and Windows

Quick Reference Values

clearance between shutter and frame3 mm

minimum holdfasts door frame6 (3 on each vertical member)

minimum holdfasts window frame4 (2 on each vertical member)

clearance at bottom for internal doors5 mm to 10 mm

Practical Notes

Ensure timber frames are properly treated with wood preservatives and a coat of primer before they are fixed into masonry to prevent moisture absorption and termite attacks.

Door and window shutters should only be fitted after all wet trades (like plastering and flooring) are completed and dried to avoid warping from excess ambient moisture.

Always store timber shutters flat or vertically fully supported in a dry, well-ventilated area to prevent bowing or twisting before installation.