Offshore Bi-Directional Testing
Is Now Possible

by Syarmine


 March 01, 2021

Ever wonder how pile load tests can be performed on offshore or marine environment? 

In recent years, a large number of offshore structures have been under construction worldwide. Driven piles have been generally used as the underlying supporting structures of these structures because of their satisfactory bearing capacity, lightweight and workability.

YJACK Technology and their distributor partners are the specialists to propose, supply, install, test and analyze bi-directional pile load tests. This type of Maintained Load Test (MLT) has been successfully done on driven piles in a marine environment. 

Among the most difficult to perform this test, is on an offshore or open ended steel pipe pile. This is now possible with YJACK’s newest and latest development into this area. Dubbed the Type O , it carries the same concepts and engineering as the Type C (Bi-Directional YJACK for driven piles) to bring this testing methodology to steel pipe piles to reduce costs, but maintain quality and accuracy. 

The YJACK assembly location will ideally be located at the middle of total pile capacity. The main aim of positioning the assembly will be to “equalize” the bi-directional forces in the pile so that failure in one direction does not occur prematurely. For measurement of YJACK pressure, the loading is derived by applying the calibration factor of the hydraulic jack to the pressure. This is possible with our testing and calibration being done in house.

The concepts and execution of Bi-Directional Testing on steel pipe piles are the same as on other types of piles, such as Bored Piles or Driven Piles and merely needed to be adapted for use in Pipe Piles. In terms of quality aspect, YJACK conform all the driven piles to ASTM standards. The quality is consistent from the first pile to the last and can be seen and verified prior to installation.

Why People Choose YJACK?

30 years of Experience

Those that spearhead YJACK have 30 years experience in managing as well as developing a business suited to the pile testing industry


We have operations in multiple countries that give us a wide scope of experience in different geotechnical environments and regions

Proprietary Technology

Our world patents allow us to maintain technology that is unique to us and is able to solve problems that the bi-directional testing industry encounters through our own jack technology

No Steel

The exclusion of the steel plates allow the YJACK to significantly reduce the risk of soft layers forming around the jack and create an overall more reliable and accurate system

Business Opportunities

We are looking for distributors and markets in many other countries to continue making a difference in the pile testing world and continue the dream of being the world's best pile test


We employ a young and dynamic team that is willing to go the distance for the company and contribute ideas as well as time to make sure the company is able to achieve our sustainability goals

How to reach YJACK?

YJACK Contacts 

KL Office
20, Jalan PP 11/5, Alam Perdana Industrial Park, 47130 Puchong, Selangor, Malaysia

Tel: +6016 - 2158 129

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