BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN August 2015 Summer Feature Project:

PLEASE VISIT US: Atlanta Hub

ADSC AMPIS Sept. 13 - 18 Shoring in Dunwoody, GA Project Park, NJ * ADSC/DFI Micropile and AER seminar Sept. 15 - 18 Saddlebrook, NJ * 40th Annual DFI Conference October 12 - 15 Oakland, CA * Central PA Geotech Conference Nov. 4 - 6 Hershey, PA * For more info please visit our website under “Meet Us”: www.contechsystems.com

Exclusive North American Supplier of:

Geo-Support Systems No problem! This 3.8-acre site, located in Dunwoody, DeKalb County, Georgia was a pleasure to work on thanks to great on We are a member of: and off-site team work by everyone involved. Even with one-way in and out traffic, plus increased site traffic congestion, it proved to be smooth operations to deliver our CTS® Class II Strand Anchors to this job; which is always a welcome treat!

Philip Manavi Project Engineer/Manager of ABE Enterprises writes: “Construction includes a high rise office building of 14 to 15 levels. The structures will have 4 levels of below grade parking with excavations on the order of 30 feet to the north and 50 feet to the south which will be required to construct the deck. The structure’s footprint will ex- tend across most of the site requiring excavation bracing (shoring) around all four sides of the parking structure. The total permanent wall area is approximately 55,000 SF which adds up to approximately 700 temporary tiebacks.” continued next page... 1/4

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Atlanta Hub Shoring Project continued ... “A dewatering system was installed here which had to draw the water table down 20 +/- feet. The central portion of the excavation consisted of hard intact bedrock that required blasting (upwards of 20+ feet of rock to reach the final subgrade). The rock required our shoring design to consist of several different methods including soil nailing, rock bolts, and beam and lagging with temporary tiebacks. The MARTA rail ran parallel to the site in the north south direction on the east side and we were challenged with shoring directly adjacent to some of the exist- ing bents. The logistics were definitely difficult as there is only one way in and out of the excavation on the high side of the site. So trying to work in conjunction with the grader and blasters while installing the shor- ing and then drilled pier foundations at the bottom was difficult. Once we got to the bottom they started the structure so it just got more con- gested with all the other trades com- ing in. Fortunately we were working with a great team and everyone did a great job coordinating efforts to make things run as smoothly as possible.” Project at a Glance: CTS® Product: CTS® Class II Strand Anchors (7, 6, 5 and 4) and components Owner: State Farm Sub Contractor: ABE Enterprises Location: Dunwoody, GA, USA Project Start Date: Fall of 2014 Project Completion Date: Fall of 2015 for shoring scope; (building completion slated for Fall 2016)

It was a pleasure to work with ABE Enterprises on this significant project! Special Thanks to: Phillip Manavi of ABE Enterprises For any further information on this project please contact Chris Love at [email protected] 2/4

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CTS’s New and Patented Application for Hollow Reinforcing Bar in CSL Testing

Crosshole Sonic Logging (CSL) of drilled shafts requires 1.1/2” (38mm) or 2” (51mm) I.D. sonic access tubes to be installed inside the steel reinforcement cage. The sonic access tubes made from PVC or smooth steel pipes, do not contribute to the structural capacity of the drilled shaft. The use of Ischebeck TITAN T73/56 CSL/Hollow Threaded Rebar for Cross Hole Sonic Logging Access Tubes combined with Longitudinal Concrete Reinforcing in Drilled Shafts (patent) is an alternative method of constructing drilled shafts and CSL probe access. The T73/56 hollow threaded rebar/sonic access tube per- forms as a high strength rebar while at the same time creates a 2.2” (56mm) I.D. sonic access tube. The deformed high strength hollow bar provides better bond to the concrete, thus reducing the problem of debonding associated with smooth PVC and steel pipe. A cost comparison has shown an advantage over conventional rebar with added sonic ac- cess tubes. The use of T73/56 CSL/Hollow Threaded Rebar as an alternative, can reduce both material and labor costs for drilled shaft construction and can provide an advantage where longitudinal reinforcing bars plus smooth tubes create congestion.

Photo Courtesy of: Oregon State University

Photo Courtesy of: Oregon State University

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Recent test results:

During a recent drilled shaft test program where our Hollow Rebar was installed, not only as a high strength rebar but also as access tubes for CSL, results showed bet- ter readout data as compared to that of the smooth pipe data.

Photo “A”: Three of the four test piles had a smooth steel and PVC- Photo Courtesy of: Oregon State University CSL excess tubes installed. Photo “A”

Photo “B”: One pile was equipped with the TITAN T73/56 CSL Hollow Photo Courtesy of: Oregon State University Rebar. Photo “B”

For further information on CTS’s new and patented application for Hollow Reinforcing Bar in CSL testing please contact: Horst Aschenbroich at [email protected]

Next scheduled Innovations Con-Tech For Your Advantage Systems ... Newsletter: September 2015