Foundation Design Resources
We offer these design resources to ensure that your foundation build and repairs go as smoothly as possible. This includes maximizing safety and efficiency. We take seriously the responsibility of passing on knowledge of our products and the foundation repair process.
We have put together a variety resources as a way to help ensure a knowledgeable journey through foundation repair. Our collection of design and inspection resources are available for download. All of this knowledge is at your fingertips.
In these documents you can find a variety of diagrams, illustrations, and vital information for the foundation repair process. We have literature that lays out some of the following:
- Moment design considerations
- Recommendations on geotechnical reports
- Corrosion and life expectancies
- Sizing guides for helical piles
- Information on capacities, lengths, and more
You can get all this information and so much more. Our design resources even include slideshow presentations, so you can stay involved and informed. A good starting place is our presentation on Reliability and Theory of Helical Pile Sizing. We have also put together a collection of safety guidelines and installation procedures available for download. Whether you want to know about the specifics of our Magnum Piering products or want to dive deeper into the foundations of foundation repair, this collection is there to assist.
Helical Pile Sizing Guides MH3521U > MH434U-6 in Cohesive Soils
Graph that shows helical pile mechanical limits in different cohesive soil densitites ranging from very soft to medium hard, measured by standard penetration resistance blow count by required ultimate helical pile capacity. Limits provided for the following piles: MH3521U, MH3530U, MH429U, MH429Y, MH434U & MH434U-6 SEE ALL SIZING GUIDES
Helical Pile Sizing Guide MS150 > MH3251 in Sedimentary Rock
Graph that shows helical pile mechanical limits in different cohesive soil densitites ranging from very soft to medium hard, measured by standard penetration resistance blow count by required ultimate helical pile capacity. Limits provided for the following piles: MS150B, MS175B, MH2325U, MH222U, MH227U(-6), MH313B MH313BR, MH325B, MH325BR(-6) SEE ALL SIZING GUIDES
Helical Pile Sizing Guide MS150 > MH3251 in NON Cohesive Soils
Graph that shows helical pile mechanical limits in different cohesive soil densitites ranging from very soft to medium hard, measured by standard penetration resistance blow count by required ultimate helical pile capacity. Limits provided for the following piles: MS150, MS175, MH2325U, MH222U, MH227U(-6), MH313B, MH3131BR, MH325B, MH325BR
Product Catalog
Rev. 11-4-2025
MAGNUM® Piering manufactures its helical pile and steel push pier products from new, high-quality, American made steel. This detail to quality extends to our entire product line from plate brackets to steel utility grillages. This 300 page interactive catalog will guide your our extensive line of steel foundation products. Printed copies are available, contact one or our team members to receive one or more for your team.
Reliability and Theory of Helical Pile Sizing
Presentation
Capacity to Torque Ratio
Presentation
Axial Capacity of Hydraulically Jacked Micropiles for Underpinning
by Howard A. Perko, Ph.D., P.E.
Director of Engineering for Magnum Piering
June 14, 2002
Push pier, push pile, and resistance pier are some of the trade names. They refer to hydraulically-jacked steel-pipe micropiles used for underpinning. The term steel push pier will be used herein. There are several different manufacturers of
steel push piers including Magnum Piering, RamJack, and Atlas Systems. Steel push piers can be installed using heavy machinery for construction of new structures This paper is focused on piers used exclusively for underpinning and repair of existing structures.
Corrosion and Life Expectancy
Structural capacities and section properties shown in this catalog are based on a design lifespan of 75 years. In most soil conditions. Epoxy powder coating can extend Corrosion and Life Expectancy time by 16 years. Hot-dip zinc galvanizing to ASTM A123/A153 can double the life.
*Design lifespan is determined by back calculating the time required for a corrosion loss thickness of 50 mils. This according to rates of corrosion per ICC-ES Document AC358 Guidelines for Design of Helical Foundation Systems and Devices for moderate to highly corrosive soil conditions. Corrosion and Life Expectancy is considerably shorter in conditions indicative of severe pile corrosion. Severe pile corrosion conditions are defined by soil resistivity less than 1,000 ohm-cm, soil pH less than 5.5. These are soils with high organic content, soils located in landfills, or soil containing mine waste. Exposure to atmosphere can shorten design life for helical piles, anchors, caps and brackets. Direct electrical contact with reinforcing steel or structural steel can have the same effect.
Alternative methods of corrosion loss calculation are available for varying soil conditions and with different building code authorities as shown in the table to the left from Perko (2009) Helical Piles: A Practical Guide to Design and Installation. Florida DOT and Canadian Building Codes provide other useful references.
MAGNUM® technical support personnel can provide assistance with regard to alternative corrosion loss calculation methods.
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