Products & Services Foundation Underpinning/Stabilization New Foundation Construction Retaining Wall Anchors Carbon Fiber Reinforcing Other Helical Anchor Applications

Foundation Underpinning/Stabilization

HELICAL-PIER® Foundation & Anchoring Systems

Underpinning buildings
New-construction deepened foundations
Lifting/stabilizing structures
Environment enhancement
Retaining walls

Benefits:

Predictable results
Lower installed costs
No waiting for concrete to cure
One-trip convenience: No site preparation or concrete required in many cases
Products to match design loads to soil conditions
Easy to store and transport
Installs in any weather & in limited-access situations
Can be loaded immediately Clean - no excavation spoils to remove
No concrete trucks or grout pumps

Before		After

Typical "stairstep" cracks in mortar indicate the deeper cause... foundation settling problems.		HELICAL PIERI® Foundation Systems stopped the foundation from sinking. Mortar repairs now will have a chance to last, too.

Underpinning

HELICAL-PIER® Foundation Systems

Description

Square-Shaft (SS or HS) HELICAL PIER® Foundation Systems anchors are designed for simple installation and to maximize the load capacity of each helix. Shafts and helices are of steel selected to meet specific installng torques and design loads. Chance screw anchors are effective in compression because soil supports the shafts against buckling.

Only dealers trained and certified by the Chance Company are to install HELICAL PIER® Foundation Systems.

Installing equipment may be a hand-held rotary tool or a digger motor on a utility truck, caisson dril backhoe or skid-steer loader. Important equipment characteristics are torque output, rotational speed, down pressure capability and angle control.

Installation torque can be monitored during anchor installation for production control. An empirical factor is multiplied times the average torque over the final 3 feet of installation to estimate ultimate capacity.

Typical applications are deepened foundation anchors, transmission tower anchors, tiebacks, hold-downs for pipelines and building foundations.

Chance HELICAL PIER® Foundation Systems offer a technically superior and cost-effective alternative to other remedial systems.

HELICAL PIER Foundation Systems may be installed only by contractors who have been certified by the Chance Company. The load-bearing steel shafts are screwed into the ground independent of the structure and their bearing or holding capacity is verified as the system is installed.

HELICAL PIER® Foundation Systems

Advantages:

A time-proven, versatile and technically sound system
Lower cost - both for the system and its installation
Faster installation than other methods
Very limited excavation - site is minimally disturbed
No heavy equipment required
Installs in limited-access areas
Used in new home construction to enhance foundation strength on sites with poor soil conditions