How long have piers existed?
They can trace their roots all the way back to 1720 in England, where they were invented. In the nineteenth century lighthouses were supported by Helical Piers.
Why is the term helical used?
Helical anchors are essentially small shaft pipe piles with one or more helical bearing plates attached. Instead of being hydraulically vibrated into the ground, like a pipe pile, they are gently rotated into the ground using high torque hydraulic gear motors. They can support most structures, including: Industrial, Commercial, or Residential.
What is the difference between a square shaft and a round shaft?
We recommend using square shafts in tension situations because it has a greater yield, tensile strength and higher torque capacity. Round shaft should be used in compression situations because it has a far superior lateral stability (the strength to resist twisting and deflection), as well as it has greater load capacities.
What are the most popular applications?
They can be used on most structures, and in 80-90% of soil conditions that exist. However, they are typically used in complex soil conditions, or limited access situations that have prohibited the use of other traditional foundation systems.
Why is it better than any other foundation stabilization technique?
They are superior to other methods in many ways. Hand-dug and drilled concrete piers can do an adequate job. However, they are extremely time consuming, very messy, expensive, and labor intensive. Driven Piles can be effective, but limited access and sensitivity of existing buildings make their use difficult for an installer. Helical piering are cost effective, requires little to no concrete, can be performed in limited access situations, and are virtually vibration free.
What is their life expectancy?
Many factors determine the life expectancy. Though they can be galvanized to prevent rusting, the varying soil conditions can affect the life expectancy. It is the general estimation that piers last over 150 years in normal soil conditions.
How much weight can they hold?
Depending on the job our Hercules Pile can hold up to 500 tons, or 1,000,000 pounds. You would see similar loads on a 10 story building application.
Will the interior of my house be damaged after installation?
Most of the time the house will not be damaged from the installation. In fact, you may find doors starting to work correctly and some cracks may close.
Why do you put them under an existing foundation?
They are used to underpin homes that are sinking. When used in combination with our Tru-lift system homes can be secured to prevent further settling or raised up to the proper height, saving the home from additional structural damage.
Can they be installed in small spaces?
Yes, our products can be installed using portable equipment that allows us to install when there are clearance issues that prevent heavier equipment from being used.
How deep can they be installed?
Most are installed between 10 to 25 feet below the soil, but may be required to extend deeper if the required torque is not met.
How do I know when I have a foundation issue?
You may notice cracks in drywall on the ceiling or walls, doors may be sticking, there may be gaps between walls and ceiling, nails coming out of the drywall, your windows may stick, floors may be cracked, or there may be gaps between walls and floors. All of these are indications of foundation issues.
What kind of warranty or guarantee do you offer with your helical piles?
We offer a 75 year limited warranty.
What is the minimum spacing?
A general rule is that they should be spaced 3 to 4 diameters on center.
What are the chances of having more foundation issues after an anchor is installed?
The chances of this are slim to none as long as you are using a quality company that will provide the proper services to get them installed correctly.
What kind of equipment is used for installation?
PierTech offers installation equipment that attaches to skid steers, mini and full size excavators and, backhoes. PierTech even offers handheld installation equipment for limited access areas.
How do I become a dealer?
To become an Installer you need to attend one of our installer certification seminars, which is free when you purchase an installation equipment package from us.
What are the benefits of becoming a PierTech installer?
Unlike many other companies, you will never compete with our Piertech installers for a job. We do not have predefined territories you are free to install in any area you choose to. We offer training that will help the installer learn the best methods for installing piers in their soil conditions. The PierTech training program teaches the science of torque ratio to load capacity and soil mechanics, in a way that is both easy to learn and understand. This is ideal for someone who is looking to self install or a contractor/company looking to add a new field to their business.
How do I find an installer for a foundation?
You can visit the Home Owners tab, click locate an installer and fill out the form, or you can call us directly at (866) 536-5007.