Plain Extension

Anchors

- Free Length

- Helical Extension

- Helical Lead Section

- Helical Pulldown Micropiles

- Helical Tieback Anchor

- Helix

- Helix Plate

- Plain Extension

- Shaft

- Thread Bar Adapter

General

- ATLAS ™ Foundation Systems

- Chance ® Alliance Network

- Chance ® Civil Construction

- Helicap

- Hubbell ® Power Systems

Geotechnical

- Consolidation Settlement

- Downdrag

- Geotechnical Capacity

- Geotechnical Failure

- Geotechnical Safety Factor (SFg)

- Insitu

- Shear Strength

- Shrink swell

- Site Inspection

- Standard Penetration Test (SPT)

- Working Load

Load

- Bending Moment

- Concentric Load

- Creep

- Crowd

- Dead Load

- Design Load

- Differential Pressure Indicator

- Eccentric Load

- Geotechnical Allowable Load

- Installation Torque(T)

- Kip

- Live Load

- Load

- Load Test

- Mechanical Allowable Load

- Mechanical Dial Torque Indicator

- Proof Load

- Proof Test

- Rated Pile Capacity

- Safety Factor

- Shear Pin Torque Indicator

- Tendon

- Tension

- Torque Relation

- Torque Strength Rating

- Ultimate Load

- Ultimate Pile Capacity

- Ultimate Pullout Load Resistance

Structural

- Bearing Plate

- Bulkhead

- Caisson

- Deep Foundation

- Effective Torsional Resistance

- Foundation

- Helical Anchor

- Helical Pier Spacing

- Helical Pile

- Helical Pulldown Micropile

- Helices

- Mechanical Safety Factor

- Micropile / minipile

- Resistance Pier

- Reveal

- Round Shaft (RS)

- Screw Pile

- Shallow Foundation

- Shoring

- Soil Nail

- Soil Screw®

- Specified Installation Torque

- Square Shaft (SS)

- Tieback Anchors

- Ultimate Mechanical Capacity

- Ultimate Torsional Strength

- Underpinning

Knowledge Base

Anchors » Plain Extension

A central shaft (with no helices) that is attached directly above the helical lead section. Extensions are coupled together and are used to extend the helical lead section to a required depth and into a soil stratum of suitable strength.