How are wooden door and window frames (chowkhats) measured?

They are measured in cubic meters (m³) by calculating the total length of the frame sections multiplied by their cross-sectional area.

What is the unit of measurement for door and window shutters?

Shutters are measured in square meters (m²) based on their overall width and height.

How is the thickness of wooden boards measured according to this code?

The thickness of boards and scantlings is measured to the nearest 2 mm (0.002 m).

How are wooden architraves, picture rails, and skirtings measured?

They are measured in running meters (linear meters), stating the cross-sectional dimensions in the description.

IS 1200

: 2000

Method of measurement of building and civil engineering works, Part 5: formwork

CurrentFrequently UsedMethod of MeasurementBIMGeneral · Methods of Measurement of Works of Civil Engg.

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This part of IS 1200 establishes the method of measurement for formwork (shuttering) in building and civil engineering works. It is used extensively by quantity surveyors, billing engineers, and estimators to calculate the correct contact areas of formwork, make appropriate deductions, and categorize formwork items for accurate BOQ preparation and contractor billing.

Method of measurement of building and civil engineering works, Part 5: formwork

Quick Reference Values

length measurement toleranceNearest 0.01 m

thickness measurement tolerance for boardsNearest 0.002 m (2 mm)

area measurement toleranceNearest 0.01 m²

volume measurement toleranceNearest 0.01 m³

woodwork frames measurement unitCubic meters (m³)

door window shutters measurement unitSquare meters (m²)

mouldings and skirting measurement unitRunning meters (m)

Practical Notes

A common mistake is measuring door frames (chowkhats) in square meters or running meters; IS 1200 requires them to be measured in cubic meters (m³).

Shutters for doors and windows must be measured in square meters (m²) separately from their frames.

Hardware and fittings (like hinges, tower bolts, handles) are usually enumerated (measured in numbers) and billed separately unless the item description explicitly states they are included.

Unlike standard linear measurements taken to the nearest 10 mm (0.01 m), the thickness of timber boards and scantlings is measured to the nearest 2 mm.