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FAQs

What should I consider before starting the piling process?

Before starting the piling process the customer does the mark out with the spray paint, and shooting levels. The customer also supplies plans, permits & setouts. We do the site cut as a preparation before piling.

 

 

Who does the mark out before piling?

Surveyor or builder or the customer does the mark out following the site cut process, before piling. We highly recommend using a surveyor to do the mark out.

 

 

 

Can the piling still be done if the site access is very limited?

Absolutely! We have a piling solution in two cases:

  1. In case the site access is limited we pump the concrete with a boom pump.
  2. If the terrain is with even tighter access we pump the concrete with a line pump.

 

 

How deep are the holes drilled?

The holes can be drilled to different depths, depending on the soil condition specified by engineers in the soil report.

  1. Sequence 1: hit-hit means the holes are next to one another with 1200mm centers
  2. Sequence 2: hit-miss is used in a less stable soil conditions where the first drill is at 2400mm centers and the second drill would be at 1200mm centers.

Depending on the job there are cases where we do sequence 3 and sequence 4  and sometimes we can do up to sequence 6.

What is the difference between wet and dry basement construction?

Wet basements have a slotted subsurface drainage collection system (pits) on the outside of the wall for collecting the groundwater and releasing the hydrostatic pressures. The ground water from the pits is pumped out.

Dry basements or tanked basements are waterproof and are typically designed to withstand the hydrostatic pressure of the saturated soil, using waterproofing agents applied to the concrete during the construction. The concrete is typically sprayed onto the walls and this type of construction doesn’t require groundwater collection.

We typically use dry basement construction method.

What does top-bottom concrete spraying method mean in capping beam construction?

The concrete is sprayed to the capping beam only 3/4 of the width leaving the front 1/4 exposed so the concrete can be spayed continuously from top to bottom, eliminating a visible construction joint on the face of the wall. The wall looks better without construction joints and more important with this construction method the chance for water leaking behind the wall trough the construction joint is completely eliminated.

 

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