DFI publishes new white paper on Crosshole Sonic Logging (CSL)

DFI announces the release of a new white paper, “Terminology and Evaluation Criteria of Crosshole Sonic Logging (CSL) as applied to Deep Foundations.”

The paper was produced by a CSL Task Force comprised of members of the DFI Codes and Standards Committee, Drilled Shaft Committee and Testing and Evaluation Committee. The CSL Task Force was chaired by E. Anna Sellountou, PhD, PE, Pile Dynamics.

The white paper reviews the state of practice (including experience gained over the past 20 years), proposes improved CSL rating criteria and makes recommendations for additional assessment, as well as educates the industry on the proper interpretation of CSL testing.

Non-destructive testing of drilled shaft foundations via CSL is often performed as part of the quality assurance process to assess the soundness of concrete. The intent of CSL testing is to identify irregularities such as soil intrusion, necking, soft bottom, segregation, voids and other defects that could result in poor structural performance of the foundation. Over time, CSL rating criteria based on first arrival time and relative energy have often incorrectly evolved to be the sole means of determining the acceptability of a shaft. Some of these criteria have found their way into regulatory agency specifications, with acceptance values often differing from agency to agency. The 17-page paper is available at no cost at www.dfi.org/publications.asp?goto=1058#P1058.


Steel Piling USA, a new competitive supplier of cold rolled steel piling

Based in Erie, Mich., Steel Piling USA combines the decades of knowledge and experience of world leading manufacturers to offer its customers a complete spread of cold formed steel piling products. Steel Piling USA products include steel spiral welded pipe piles, steel sheet piles and heavy wide flange beams, which can currently be produced in lengths up to 130 feet, as well as sealants and coatings.

Production lengths are expected to increase when Steel Piling USA’s permanent facility is built; construction on the 375,000 square foot facility will begin in 2020. The manufacturing facility will be built at the Port of Monroe in Monroe, Mich., about 10 miles from the current facility. The location at the Port is expected to provide approximately 110 local jobs. Additionally, the proximity to Lake Erie and its shipping routes offers Steel Piling USA superior distribution capabilities throughout North America to fully meet its customers’ needs.

Exclusive mill technology and capacity allow Steel Piling USA to duplicate or improve on the shape of any hot rolled or cold formed steel sheet piles with thicknesses up to 0.65 inches and the highest section modulus properties in the industry. The steel spiral welded pipes, which are double submerged arc welded, can be produced in diameters ranging from 16 inches to 120 inches, and up to one-inch thick.

Steel Piling USA is ready for your orders today! For more information, please visit www.steelpilingusa.com.


Innovative QA solutions driven by Pile Dynamics, Inc.

As the use of drilled foundations continues to increase, innovative manufacturers look for ways to optimize these foundation elements. Coming from a strong background in deep foundations, Pile Dynamics, Inc. (PDI) can offer the competency and expertise to develop solutions for testing drilled shafts. The research and development team at PDI recognizes areas of concern in drilled shaft practice that can impact the structure’s performance. The team has determined several quality control methods that could be greatly improved.

One of the desired improvements in shaft quality control is the verticality measurement of the excavation. With no testing method or data to reassure the verticality, the performance of the structure could be compromised. Looking for a way to collect and assess data from the excavation, PDI created the Shaft Area Profile Evaluator (SHAPE). This QA technology offers measured views of the shaft, with a 3D visualization. The SHAPE is lowered into the slurry-filled shaft via attachment to the Kelly bar, identifying irregularities that affect shaft performance. Built with ultrasonic scanning capabilities, the SHAPE scans up to eight channels simultaneously, while advancing in the excavation at a rate of one foot per second. The built-in wireless capability allows the SHAPE data to be quickly sent to the field tablet immediately upon exiting the excavation.

Additional improvement needed for improved quality control of drilled shaft construction was the cleanliness at the base of the shaft. If the base of the drilled shaft isn’t properly cleaned, the shaft may not perform as designed. Verifying the conditions at the base of a drilled shaft can be challenging, but PDI created the Shaft Quantitative Inspection Device (SQUID) to help verify these measurements. To improve the inspection method, SQUID takes accurate measurements of force versus displacement at the base of the shaft, providing an objective, quantitative assessment. The SQUID is lowered into the excavation via attachment to the Kelly bar and provides an accurate measurement of debris at the base as well as resistance to penetration in the bearing material. These results can be sent wirelessly from the drilled location to the SQUID tablet, which allows for quick and effective testing.

These innovations offer quantitative data that can improve the quality of drilled shafts in an efficient manner. With wired and wireless options, the SQUID and the SHAPE are versatile systems with quality results.

“We felt the market needed a modern and rugged device where we eliminate common points of failure such as electronic cables running from the surface to the device to provide increased accuracy and performance,” said George Piscsalko, president of PDI. “Both SHAPE and SQUID’s wireless capabilities allow shaft integrity discussions to happen in real time, at the jobsite or remotely via PDI’s SiteLink® technology, saving time and money.”

SHAPE and SQUID are the latest additions to PDI’s extensive line of quality assurance and quality control systems for the deep foundations industry. The company is located in Cleveland, Ohio, with offices and representatives worldwide. For more information visit www.pile.com or contact This email address is being protected from spambots. You need JavaScript enabled to view it. today.


Pile Master air hammers hit the pile driving market

Foundation Hammers, LLC, has breathed new life into the Pile Master Air Hammer line. Originally designed for the dock building industry, the product line has been expanded to suit the entire pile driving industry.

“Many air hammers are very heavy, require a lot of air to operate and are not efficient,” said Mike Roberts of Foundation Hammers. “We designed the Pile Master hammer to be lightweight, require less air and [be] able to produce up to 90 per cent impact energy transfer with an air compressor as small as 185 CFM.”

Roberts was named director of Pile Master Products in early 2019. His duties include overseeing manufacturing; setting up a national dealer network for distribution, sales and rental; and developing training programs for sales, service and repair. Roberts is a pile driving equipment veteran who started his career in 1999, as parts manager for Florida-based Pile Equipment.

Pile Master hammers can be guided with 21- or 26-inch (53- or 66-centimetre) leads, or freely suspended with an extended base to drive timber piles, H-piles, steel pipe and pre-stressed concrete piles. An optional sheet pile adapter makes the hammers ideal for driving sheet piles in soil conditions where a vibratory hammer cannot achieve the required depth. Pile Master hammers are also environmentally friendly, using a biodegradable anti-freeze as the only lubricant.

There are currently four Pile Master models available. The 24-900 offers an adjustable stroke from six to 24 inches and 450 to 1,800 foot-pounds of energy; the 24-2500 offers 1,250 to 5,000 foot-pounds of energy; the 36-3000 offers six to 36 inches and 1,500 to 9,000 foot-pounds of energy; and the 36-5000 offers 2,500 to 15,000 foot-pounds of energy. The 24-900 and 24-2500 models require a 185-CFM air compressor, while the 36-3000 and 36-5000 models require only 375 CFM.

Contact Mike at This email address is being protected from spambots. You need JavaScript enabled to view it. to inquire about becoming a Pile Master distributor.


Revolutionary new side gripper offers higher reliability

Dieseko Group B.V. has recently launched a revolutionary new side gripper: the 2308SG.

“Dieseko is using over 45 years of experience in vibratory hammers to be applied in their new side gripper, making it a unique and reliable machine. Unique in the side clamp-principle and in elastomer geometry and reliably applied by proven vibratory technology,” said Dirk Smulders, CEO of Dieseko Group.

“During the development phase of our Side Gripper, Dieseko’s R&D engineers focused on providing a concept which improves the challenges experienced with side grippers currently available, without neglecting Dieseko’s design philosophy (limited number of moving parts, protected hoses; both resulting in a high reliability, only three hoses for connection).”

Four major differences compared to existing systems are:

  1. Unique linear side-clamping system results in a more efficient clamping load transfer.
  2. Modular side-grip clamping system results in less downtime during exchange of the side-grip inserts for various profiles.
  3. Clamp opens up to 330 millimetres for sheet piles and H-beams, and 550 millimetres for casings.
  4. Unique multi-directional elastomers create a more stable and predictable movement of the dynamic part of the side gripper.


The exchangeable excavator connection adapter allows the side gripper to fit onto any excavator adapter type, and the unlimited 360-degree rotary head with +/- 35-degree tilting adapter makes it possible to operate the side gripper in any position while handling a profile. Its distinct design is easily accessible for maintenance.

After extensive testing, partly by experienced side gripper operators, the results and experiences are promising. The 2308SG uses an oilflow of 214 litres per minute at 350 bar. A 35 tonne excavator is required for best performance. Operating the side gripper can be done by a remote control joystick or excavator controls.

More information at www.diesekogroup.com.



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Piling Canada is the premier national voice for the Canadian deep foundation construction industry. Each issue is dedicated to providing readers with current and informative editorial, including project updates, company profiles, technological advancements, safety news, environmental information, HR advice, pertinent legal issues and more.