What load can a pile bear?
The bearing load that a pile may carry is determined by the type of soil in which it is installed. The denser the soil, the higher the load bearing capacity will be. It is during installation that this capacity is determined. 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 arm. He then can determine, thanks to a precise guide chart, the load bearing capacity of the pile. In loose soil it is possible that extensions may be necessary to reach a more compact soil, and desired capacity.
What distance is recommended between piles?
Generally, we recommend that the distance between each pile not exceed eight (8’) to ten (10’) feet.
How much does a pile cost?
Postech Piles are an affordable solution to your foundation requirements. However, it is difficult to determine an exact cost since several factors must be taken into account: The structure to be supported, type of soil, length, region, etc. Contact a Dealer in your area for more details.
What happens when you hit a rock?
Our piles are, unfortunately, not equipped with a drilling head. However, in the overwhelming majority of cases, the installer will be able to deviate around the rock, to allow the pile to continue its descent. If the rock is really too large, and that 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.
Can your piles be installed in rock?
Generally yes. Postech has developed a method allowing anchoring the pile to rock.
Can the piles be installed under an existing structure?
Yes, it is possible to install the piles under an existing structure. However, the proposed location of the piles must be 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 wood patio, the customer may remove some floorboards to allow installation of the piles in a precise location.
Must we leave a space between the soil and the structure?
Yes, 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. 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.
Is it necessary to have a protective coating 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, and which prevents the pile moving with the frost heave. It is for this reason that the pile must be installed in such a manner so that the blade is BELOW the frost line. In fact, Postech has developed a process which prevents cold air from moving down the inside of the shaft. See section THERMAL PILES for more details.
Do your piles rust?
No. All Postech Piles are hot-dipped galvanized according to standard CAN/CSA G164, therefore 610 g/m3.
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 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.
My driveway has an asphalt surface, and I want to build a carport. Can screw piles be used?
Yes, it’s possible. A 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, Postech Piles must be installed 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 screw pile over a concrete post (sonotube® types)?
There are many advantages in using Postech Piles rather than concrete post foundations (sonotubes ®). Consult section Why choose Postech piles for more details.
Must we complete certain verifications prior to having screw piles installed on our property?
What’s important is that you know if there are certain installations buried on your property at the locations where you wish to have screw 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 check with your local (town or city) municipal government for location of underground installations.