Measuring kerb and channel for RA bills

Unit of measurement

Kerbs and channels is measured in rmt. Kerbs and channels are measured in running metres along the line laid, side by side and chainage by chainage, with openings left out.

The BOQ item description decides the unit and what the rate includes. Where the BOQ and this guide differ, the BOQ and the contract's mode of measurement win.

What is measured

• Length along the kerb face between chainages, on each side of the road.
• Type and size of kerb or channel, each a separate item where the BOQ separates them.
• Length around curves and bus bays, along the actual line laid as per drawing.
• Foundation concrete and backing, where they are separate items.

Standard deductions

• Openings at junctions, median gaps and driveways are taken out.
• Drop kerbs at crossings may be a separate item, as per the contract's mode of measurement.
• Broken or rejected units replaced by the contractor are not measured again.

Worked example

MIDC internal road, precast kerb on both sides, Ch 0+000 to 0+500, with two median openings at junctions. L is the length per side.

Row by row: Ch 0+000 to 0+250, both sides, 2 x 250 = 500.00; Ch 0+250 to 0+500, both sides, 2 x 250 = 500.00; Less junction openings, 2 x 12 = 24.00.

Total: 500.00 plus 500.00 minus 24.00 = 976.00 rmt. Deductions are entered with negative nos, so they reduce the total in the same column.

Common disputes

• Junction openings are not taken out.
• Curved lengths are measured on the chord instead of the arc.
• Replaced units are billed again.

Recording it in Tatha Vastu

Kerb entries carry the side and the chainage, so the strip view shows gaps and overlaps at a glance. Openings are deduction rows tied to the junction they belong to.

Approved entries are locked, and a correction becomes a new version with its reason. See the measurement book, or use the measurement sheet template if you still keep the register in Excel.