Civil ground Works,which is the preparation of the soil mattress created by using large amount of G5 compacted together to form the base of the Raft Foundation.

Civil Engineering: *Raft Designs *Slab Designs *Roof Designs *Structural Designs/Engineering

Fixing of reinforcement (steel) which covers the ground beams incorporated into the raft foundation,increasing the strength of the foundation.

Concrete slabs are built on the building site using formwork - a type of boxing into which the wet concrete is poured.The slab is to be reinforced with rebars.

Relatively rigid walls used for supporting the soil mass laterally so that the soil can be retained at different levels on the two sides.




About Master Raft

Master Raft is a well established Reinforced Concrete Raft Foundation company, founded by Ben Steenkamp in 2006.

Since we opened for business in 2006, our company has gone from strength to strength.

Encouraging us to expand our services by implementing Civil Engineering and Soil Mattressing (Civil Groundworks).

Our Services:

  • Civil Ground works

We do Civil Ground works, which is the preparation of the soil mattress created

by using large amounts of G5 compacted together to form the base of the Raft Foundation.

''Geotechnical engineering is an area of civil engineering concerned with the rock and soil

that civil engineering systems are supported by. Knowledge from the fields of geology,

material science and testing, mechanics, and hydraulics are applied by

geotechnical engineers to safely and economically design foundations,

retaining walls, and similar structures.


  • Reinforced Concrete Raft Foundations

What is a Raft?

Reinforced Concrete Raft foundations are used to distribute heavy column and wall loads across the entire building area,

to lower the contact pressure compared to conventional spread footings. Reinforced Concrete Raft foundations can be constructed

near the ground surface, or at the bottom of basements. In high-rise buildings, Reinforced Concrete Raft foundations

can be several meters thick,with extensive reinforcing to insure relatively uniform load transfer.

Raft Foundations is mainly used for different soil conditions on specific areas.

The soil conditions include:

  • Clay (Heaving Soils)
  • Sand (Collapsible Soils)
  • Sinkholes (Dolomite Soils)

By choosing to do a Master Raft, Raft Foundation

on these specific soil conditions will increase its  strength,

stability and flexibility,giving you best results the first time round.


  • Slabs and Designs

More about Concrete Slabs:

A concrete slab is a common structural element of modern buildings.

Horizontal slabs of steel reinforced concrete, typically between 10 and 50 centimetres thick,

are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.

In many domestic and industrial buildings a thick concrete slab, supported on foundations or directly on the subsoil,

is used to construct the ground floor of a building. In high rise buildings and skyscrapers, thinner, pre-cast concrete slabs

are slung between the steel frames to form the floors and ceilings on each level.

On the technical drawings, reinforced concrete slabs are often abbreviated to "r.c.slab" or simply "r.c.".

  • Civil Engineering
  • Raft Designs
  • Slab Designs
  • Roof Designs
  • Structural Designs/Engineering


  • Slabs and Designs


More about the Design of a Concrete Slab:

For a suspended slab, there are a number of designs to improve the strength-to-weight ratio.

In all cases the top surface remains flat, and the underside is modulated:

Corrugated, usually where the concrete is poured into a corrugated steel tray.

This improves strength and prevents theslab bending under its own weight.

The corrugations run across the short dimension, from side to side.

A ribbed slab, giving considerable extra strength on one direction.

A waffle slab, giving added strength in both directions.


Together with our team of professional Engineers we can provide:

  • NHBRC Approvals
  • Engineers Inspection
  • Completion Certificates

Insuring our good quality work of exceptional standards.

Master Raft has a well trained and professional team of people helping us reach our goals.

Master Raft's goal is to produce and deliver good quality work of exceptional standards to our clients.

Insuring complete satisfaction first time round.

Master Raft's personal team together with professional Engineers and Surveyor's

is what makes Master Raft what it is today.

 Our areas of operation include:


  • Centurion and surrounds
  •  Johannesburg
  • Midrand
  • Tshwane
  • Sandton and surrounds









South Africa

Contact Us:
Ben Steenkamp
Tel no:0126533672
Mobile no:0827291000
Fax no:0126533672

Please enter your details so we may contact you!

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