CHANCE® Power-Installed Foundation Anchors
CHANCE® Instant Foundation® System
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 thousands 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 inclement 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. Hubbell Power Systems (HPS) 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
- 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 HPS representative:
- Complete the form on the facing page.
- Refer to the soil classification chart below and/or furnish boring logs/report information if available.
Make copies as needed for separate applications.
HPS applications engineers then can match a foundation to meet your performance criteria with computer-assisted design capabilities through interactive software programs.
|Class||Common Soil-Type Description||Geological Soil Classification||Probe Values in.-lbs. (Nm)||Typical Blow Count "N" per ASTM-D1586|
|0||Sound hard rock, unweathered||Granite, Basalt, Massive Limestone||N.A.||N.A.|
|1||Very dense and/or cemented sands; coarse gravel and cobbles||Caliche, (Nitrate-bearing gravel/rock),||750-1600 (90-208)||60-100+|
|2||Dense fine sand; very hard silts and clays (may be preloaded)||Basal till; boulder clay; caliche; weathered laminated rock||600-750 (78-98)||45-60|
|3||Dense clays, sands and gravel; hard silts and clays||Glacial till; weathered shales, schist, gneiss and siltstone||500-600 65-78||35-50|
|4||Medium dense sandy gravel; very stiff to hard silts and clays||Glacial till; hardpan; marls||400-500 (52-65)||24-40|
|5||Medium dense coarse sand and sandy gravels; stiff to very stiff silts and clays||Saprolites, residual soils||300-400 (39-52)||14-25|
|6||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)||7-14|
|**7||Loose fine sand; Alluvium; loess; soft-firm clays; varied clays; fill||Flood plain soils; lake clays; adobe; gumbo, fill||100-200 (13-26)||4-8|
|**8||Peat, organic silts; inundated silts, fly ash||Miscellaneous fill, swamp marsh||less than 100 (0-13)>||0-5|
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.
Non-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.