Frequently Asked Questions

What load can a Postech Screw Pile bear?

Our standard 3.5? piles achieve 22,500lbs of load capacity in granular soil or silt. The denser the soil (i.e. clay), the higher the load bearing capacity will be. It is the torque achieved during the installation process that determines this capacity. While screwing in the last few inches of the pile, the installer validates hydraulic pressure, with the help of a pressure gauge located on the excavator. Postech’s precise guide chart can determine the correlation of torque achieved to the load bearing capacity of the pile. In loose soil it is possible that extensions may be necessary to reach a more compact or undisturbed soil, and desired load capacity.

How much does a pile cost?

It is difficult to determine an exact cost since several factors must be taken into account such as: the structure to be supported, type of soil, length, region, etc. Due to the high load bearing capacity of Postech Piles vs. other products, project often require less of our piles. We are always ready provide fast, no-charge and no-obligation quotes specific to the projects requirements.

What happens when you hit a rock?

Usually, the installer will be able to deviate around rocks, to allow the pile to continue its descent. If the rock is too large, and if construction parameters allow, the pile may be installed at another location. In the case where the pile must be installed in a very precise location, excavation may become necessary, but these cases are rare; in most cases we are able to excavate and remove rocks on site using our equipment.

Can the piles be installed under an existing structure?

Yes, it is possible to install the piles under an existing structure, provided that the proposed location of the piles is relatively close to the edge of the structure. If the piles must be installed in the middle of a structure, there must be an access to allow the piles to be installed. For example, in the case of a deck, some floorboards may need to be removed to allow installation of the piles in a precise location.

Must we leave a space between soil and the structure?

It is very important to leave sufficient space between the soil and the structure (including trellises, stairs, etc.), to allow for heaving of the soil due to frost and to protect the structure from moisture. If the structure is in contact with the soil, then the pile’s usefulness is limited, because the frost will make the soil heave and move (raise) the structure.

What areas does Vancouver Island Postech serve?

We proudly install Canadian made Postech Screw Pile foundations on Vancouver Island, the Gulf Ilsands and projects throughout British Columbia.

Please note that Postech has more than 50 dealers across Canada to serve your needs.

Do your piles rust?

No. All Postech Piles are hot-dipped galvanized according to standard CAN/CSA G164, therefore 610 g/m3. Is it necessary to have a protective sheet around the pile to guard against frost heave? Absolutely not, the frost has no hold on the galvanized steel shaft. It is the base of the pile (blade) which acts as an anchor in undisturbed soil, and which prevents the pile from moving with any ground movement.

Have performance tests been completed on Postech piles?

Absolutely, Postech Piles have been tested using many required and vigorous industry standards (see section The Pile/Technical information) and are approved by the Canadian Construction Materials Centre (CCMC #13102-R). This organization is responsible for the evaluation and approval of all products that are recognized as construction materials in Canada. What this means is that Postech Piles meet these high quality standards. For your protection it is very important to use piles that have been tested and approved by the CCMC. In fact, most local and state governments, as well as insurance companies request it.

I want to build on an existing asphalt surface, can augured piles be used?

Yes, it’s possible. A small hole, however, must be made in the location where the pile will be installed. Afterwards, a slight touch-up of the asphalt around the pile will be needed.

Can we install the piles ourselves?

No, the installation of Postech screw piles must be overseen by certified installers, all of which have attended a complete training seminar, and have all the qualifications required to best guide you with your projects.

What are the advantages of a Postech Thermal Pile over a concrete post (sonotube® types)?

  • Quality tested materials and professional installation is supplied – You don’t have to do a thing, simply indicate the location!
  • Fast & accurate installation, generally without excavation (no damage to land site).
  • Construction can begin as soon as the Screw Piles are installed.
  • They may be installed beneath existing structures.
  • They are reusable & recyclable (we can unscrew and reinstall them).
  • They are adjustable. After the pile’s installation, a Postech Screw Pile supporting head is added, which fits into the piles shaft, and allows for level setting (up to six inches).
  • They may be lengthened with Postech Screw Pile sleeved extensions.
  • Excellent price/quality value often cutting building costs
  • Different blade dimensions allow for adjustment to different soil types and load bearing requirements.
  • May be installed regardless of temperature, climate or time of year with no special equipment required.
  • May be installed in soil where water table is near surface.
  • May be installed near or in water without causing soil erosion pollution or rusting.
    The concrete forming tubes normally used, pale in comparison to the numerous advantages efficiency and flexibility that the Postech Screw Piles offer.

    Postech Screw Piles offer a solid and durable foundation, with many advantages over traditional methods of using concrete.

Do I have to Call Before I Dig / Arrange Utility Line Location Services?

What’s important is that you know if there are certain utility installations buried on your property at the locations where you wish to have augured piles installed, (water main, electrical cables, sewer, gas main, or all other underground installations). If you do not know what installations are buried on your property, it will be difficult for our installers to know. Please contact BC1Call at 1-800-474-6886 or *6886 on your cell.