Composite Rate Build Up for Ground Floor Construction – Approximate Quantities in Elemental Estimate Layout

Composite Rate Build up – Floor Construction

In this example, the Elemental Estimate layout and grouping of items will be used. There are principles that you have to follow when building up composite rates for Approximate Quantities. We are going to illustrate a composite rate build-up for Ground Floor Construction:

Topsoil excavation average depth 150mm, 100mm surface concrete bed (30MPa) on DPM, on 25mm thick sand blinding under floors, over 150mm hardcore filling on compacted ground including ant proofing and mesh wire reinforcement.

Step 1

First, you have to determine the Group unit of measurement. When you are measuring Ground Floor Construction in Elemental or Approximate Quantities estimating, the group unit of measurement is the square metre (m2).

Step 2

The second step is listing all associated Bill items that can be mapped to Floor Construction by area. These are:

• Topsoil excavation – (m2) Rate – 5.00
• Surface concrete bed – (m3) Rate – 1200
• Mesh wire reinforcement – (m2) Rate – 125.00
• DPM – (m2) Rate – 7.00
• Sand blinding under floors – (m2) Rate – 35.00
• Hardcore filling – (m3) Rate – 40
• Ground compaction – (m2) Rate – 5.00
• Ant proofing – (m2) Rate – 7.00
• Striking off and floating top surface – (m2) Rate – R10
• Ceramic floor tiles – (m2) Rate – R250
• Screeds – (m2) Rate – R30

Step 3

Since your Group unit is the square metre (m2), you should convert the Bill item rates to Cost per Square Metre.

The composite rate for GROUND FLOOR CONSTRUCTION is R600 per square metre.

Elemental Layout and Grouping

Items which go into the element GROUND FLOOR CONSTRUCTION and component Solid Floors are stated in the description:

Items which go into the element FLOOR FINISHES and component Applied Floor Finishes are stated in the description: