DOT & Utility

CHANCE® Power-Installed Foundation Anchors

Instant Foundation System

CHANCE® Instant Foundation System CHance-Instant-Foundations-DOT


Over 90 years of research, development and testing have advanced our Instant Foundation® System to its present mature stage. Compared to traditional methods, the Instant Foundation System offers attractive benefits in the conservation of labor, materials, equipment and, especially, time.

Power-installed foundation anchors have been proved in thou- sands of installations throughout the world. CHANCE® engineers have installed, tested and retrieved countless foundation anchors to confirm performance and durability. The amount of torsional force required to install a foundation anchor relates to its installed ultimate capacity. This means that holding strengths are predictable in most soils by choosing a foundation anchor based on soil data and by measuring torque during installation.

A typical Instant Foundation anchor can be installed in minutes using standard equipment. The superstructure can be mounted immediately – no waiting for concrete to cure. CHANCE® foundation anchors can be installed in all weather conditions, thus eliminating weather related delays. They can function as permanent installations or serve as temporary foundations. They can be easily retrieved and reused.

The CHANCE® Instant Foundation System includes a broad range of foundation anchors with various attachments for field adjustments. CHANCE® support services include analysis of soil boring data, job-specific foundation anchor recommendations, personnel training videos and hands-on demonstrations.

Advantages of Instant Foundation® Anchors

  • Capacity proportional to installing torque
  • One trip convenience – No advance site preparation No concrete required
  • Clean. No excavation or spoils removal
  • Reusable
  • Easy to transport to job site
  • Convenient storage
  • No expensive anchor bolts
  • Install through macadam
  • Available from supplier stock
  • Install with available equipment
  • Clean. No excavation or spoils removal
  • Ideal for areas with limited access

Save Time and Monday in Countless Applications

Non-Extendable Foundations for Site Lighting or any Pole Support

To help you determine the type and size of power-installed foundation for your requirements, furnish the following data to your CHANCE® representative:

1. Complete the form on the facing page.

2. Refer to the soil classification chart below and/or furnish boring logs/report information if available.

Make copies as needed for separate applications.

CHANCE® applications engineers then can match a foundation to meet your performance criteria with computer-assisted design capabilities through interactive software programs.



Common Soil-Type Description

Geological Soil Classification

Probe Values in.-lbs. (Nm)

Typical Blow Count “N” per ASTM-D1586


Sound hard rock, unweathered

Granite, Basalt, Massive Limestone




Very dense and/or cemented sands; coarse gravel and cobbles

Caliche, (Nitrate-bearing gravel/rock),

750-1600 (90-208)



Dense fine sand; very hard silts and clays (may be preloaded)

Basal till; boulder clay; caliche; weathered laminated rock

600-750 (78-98)



Dense clays, sands and gravel; hard silts and clays

Glacial till; weathered shales, schist, gneiss and siltstone

500-600 65-78



Medium dense sandy gravel; very stiff to hard silts and clays

Glacial till; hardpan; marls

400-500 (52-65)



Medium dense coarse sand and sandy gravels; stiff to very stiff silts and clays

Saprolites, residual soils

300-400 (39-52)



Loose to medium dense fine to coarse sand; firm to stiff clays and silts

Dense hydraulic fill; compacted fill; residual soils

200-300 (26-39)



Loose fine sand; Alluvium; loess; soft-firm clays; varied clays; fill

Flood plain soils; lake clays; adobe; gumbo, fill

100-200 (13-26)



Peat, organic silts; inundated silts, fly ash

Miscellaneous fill, swamp marsh

less than 100 (0-13)


Class 1 soils are difficult to probe consistently and the ASTM blow count may be of questionable value.
**It is advisable to install anchors deep enough, by the use of extensions, to penetrate a Class 5 or 6, underlying the Class 7 or 8 Soils.

CHANCE-Extendabe-FoundationNon-Extendable Foundations for Depths to 10-Feet

A typical non-extendable foundation installation can be made in 10 to 20 minutes using conventional rotary equipment. Torque capacities vary from 10,000 to 25,000 foot-pounds depending on diameter of foundations. Once the foundation is installed, load can be applied immediately. The geotechnical staff of CHANCE® can provide design assistance for a foundation anchor system based on your furnished subsurface information and loading requirements. Soil parameters usually dictate the number of foundation anchors to support a given load.

Compression load capacities of non-extendable foundations average 20,000 pounds. Local soil conditions govern foundation capacity. The lateral- load capacity of an individual element is a function of the pipe length, diameter and soil strength properties.

The large-diameter helix on the foundation usually provides sufficient compression-load capacity and standard base-plate bolt patterns accommodate most attachments. Custom-made patterns can be made to meet specific needs.

Non-Extendable Foundations for Many Applications

Power-installed foundations are furnished in two basic styles: Variable and Fixed bolt circle base plates. Slipbase design is optional. Bolts, nuts and washers included. Can be installed through macadam (blacktop) surfaces. Rated to 25,000 ft.-lbs. of torque. Bolt retaining washers for the slotted baseplate are available.

These power-installed steel foundations are available with 3- or 4-hole variable bolt circle base plates. Bolts and nuts are furnished. Can be installed through macadam. Rated 8,000 ft.-lbs. of torque.

Click here to download the CHANCE® Power-Installed Foundation Anchors: Instant Foundation System PDF with additional information.