http://www.yde.co.il

Design of bridges, tunnels and civil engineering structures.

Structural design of long span structures, sport facilities, car parks, residential, industrial and commercial building.

Studies, reports and estimates for structural engineering projects.

Consultation to contractors and engineers for post-tensioned structures and unique structural design.

Value engineering - reviewing and optimization of existing design.

Specialty in post-tensioned structures. ]]> office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD) office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD) Copyright 2012, I. Stern - Y.D.E. Engineers, LTD civil engineers en-us 60 Thu, 26 Jan 2012 09:15:00 GMT Thu, 26 Jan 2012 09:15:00 GMT http://www.yde.co.il http://www.yde.co.il/images/yde-engineers-logo.jpg

The company has excellent capability and creativity to find the most economic solution, yet technically sound and safe structure.

Due to these qualities we became the most preferred consulting engineering company among the contractors competing on Design-Build bids projects.

The company is specialized in the spliced girders method.

This method is the way to maximize span/depth ratio for bridges composed of pre-cast girders.

Utilization of this method, combined with the company developed system for optimization of post-tensioned tendon profiles, enables reducing 20%-40% of the structures cost, compared to other alternative design methods.

Zohar Bridge is composed of standard precast AASHTO VI girders with 52 meter span. B9 Bridge on road 431 is composed of standard channel girders 1.80 meter deep with 54 meter span. The Histadrut Bridge is composed of channel precast girders 2.5 meter deep with 72 meters span: this is the largest span spliced girder bridge and among one of the largest bridges composed of precast elements with this span/depth ratio.

The company designs integral abutments bridges up to 80 meters long, including bridges with large diameter concrete piles. The integral abutments bridges avoid the need for bearings and expansion joints, reducing construction cost and dramatically minimizing the maintenance cost. The integral abutments bridges improve the riding quality of vehicles. Accurate analysis of the creep, shrinkage, temperature difference effects and the foundation soil interaction is accomplished, resulting in a very well performing bridge.

]]> http://www.yde.co.il/Bridges-and-Civil-Engineering-Structures.aspx http://www.yde.co.il/Bridges-and-Civil-Engineering-Structures.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD) Buildings with monostrand unbonded tendons post-tensioned slabs are becoming a widely used application of prestressed concrete. This method achieves performance and construction improvements over other construction methods. However, in order to reap the benefits of this method, proficiency is required in both structural design and construction.

Post-tensioned slabs is a preferred method for industrial, commercial and residential floor slab construction. The increasingly extensive use of this method is due to its advantages and its nature of easy application to a wide variety of structure geometry and design solutions.

Prestressed floor systems using monostrand tendons may be designed as either one or two way slab systems, and may be flat plate, flat slab waffle slab, or other slab sections. The prestressing is achieved by individually tensioning tendons, placed within internally greased protected plastic sleeves, arranged in the slab prior to casting. Compressive stresses are applied to the concrete via tendon anchors. Prestressing is performed within three to seven days of casting.

Unlike the multi-strand system (which is primarily suited for beams and girders) the monostrand method allows prestressing of slabs as thin as 15cm. while maintaining vertical optimal curvatures for the structure. The monostrand system is also simpler, requires less in site organization, and is more forgiving to construction variances.

Advantages afforded by unbonded slab prestressing as compared with alternative designs include:

• Increased speed of construction as prestressing allows for faster stripping and reuse of formwork.
• Thinner slabs resulting from post-tensioning by virtue of improved deflection behavior and improved section utilization.
• Improved economy due to reduced slab thickness and associated concrete costs, reducing building weight with the corresponding foundation reductions, reduced building height with the corresponding decrease in building skin area, and a reduced amount of mild reinforcing rebar.
• Large area slabs can be maintained with no control joints.
• Simpler coordination between consultants due to a flat slab underside, the design and installation of utilities systems is simpler (heating, air conditioning, sprinklers, etc.)
• Increased design flexibility allows simple solutions even for structures with irregular geometry, without the need for transverse or longitudinal beams.
• Longer spans can be achieved improving the architectural structure flexibility.
• Long-term deformations due to creep, which are usually significant in concrete slabs, are almost nonexistent in unbonded tendons prestressed slabs.
• Longer building life cycle due to the uncracked nature of the prestressed concrete. This advantage also creates slabs more resistant to water penetration, and the structure behaves monolithically.
• Post-tensioned slab on grade – by post-tensioning, large area of slab on grade for any propose, can be designed without any joint, improving performance of the slab, increasing life span and reducingmaintenance cost.

]]> http://www.yde.co.il/Post-Tensioned-Buildings.aspx http://www.yde.co.il/Post-Tensioned-Buildings.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD) http://www.yde.co.il/Steel-Structures.aspx http://www.yde.co.il/Steel-Structures.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD)

Founded in 1989.

Policy of high quality and economy design.

Application of modern structural systems.

Extensive use of advanced structural analysis and design software.

Professional staff well acquainted with American and international codes and standards, ACI, AISC, AASHTO codes, Eurocode, BSI requirements and fib recommendations.

Demonstrated capabilities for production under time constraints.

The company's quality management system is approved according to the requirements of ISO 9001, 2000.

Accurate analysis and design. Any structure from large bridges to culverts is analyzed by a computerized model of the entire structure as a whole including foundation/soil interaction.

Dynamic and second order analyses are performed where ever required.

This investment in any project ensures safe and economic design, long life, good performance and crack free structures. ]]> http://www.yde.co.il/Company.aspx http://www.yde.co.il/Company.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD) M.Sc. Civil Engineering 1988 - University of Maryland, U.S.A.
B.Sc. Civil Engineering 1977 - Technion - Haifa, Israel.

• Structural engineer since 1977 in Israel and in the U.S.A.
  
  
• Licensed engineer in Israel and the U.S.A. - P.E. No. 15234 MD., U.S.A.; License No. 23678, Israel.
  
  
• Member of the Specialists Committee of Pre-Stressed Concrete-Standards Institute of Israel.
  
  
• Consultant to the Israel Government Committee, preparing standard construction specifications for pre-stressed concrete.
  
  
• Member of fib - federation internationale du beton. Member of ACI - American Concrete Institute.
  
  
• Israel Organization of Consulting Engineers & Architects. Representative in FIDIC - International Federation of Consulting Engineers.

Izhak Z. Stern has published and presented many papers on bridges and post-tensioned structures at proffessional conferences around the world. ]]> http://www.yde.co.il/Management-Izhak-Z-Stern.aspx http://www.yde.co.il/Management-Izhak-Z-Stern.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD)

Any group of professional engineers, architects and contractors interested in a presentation are wellcome to contact us.

A short course on post-tensioned concrete basics, including some new approaches, may be presented per request to any group.

]]> http://www.yde.co.il/Papers-Research.aspx http://www.yde.co.il/Papers-Research.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD) Why Work for Us
I. Stern - Y.D.E. Engineers LTD is a privately-owned, structural engineering company with exciting plans for growth and expansion. These plans are already being realised and we are looking for people with the ambition to further their career and help drive the company forward.

We are an investor in human resources; people who will support you throughout your career with us, offering training and promotion opportunities at all levels. Our contracts are varied and our projects range from bridges, tunnels, long span structures, post-tensioned structures, steel structures and unique structural design.

You will be joining a company which strives to exceed clients' expectations through innovation and teamwork. You will be part of a team which interacts with communities affected by the works. You will be working in an environment where environmental awareness is high on the agenda.

We aim to be the best by employing the best.

If you are interested in working with us, please email us a copy of your CV to jobs@yde.co.il. ]]> http://www.yde.co.il/Structural-Engineering-Careers.aspx http://www.yde.co.il/Structural-Engineering-Careers.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD) Address:15 Gershon Street
Tel Aviv 67017
Israel Phone:(972) 3-561-1150 Fax:(972) 3-561-1087 Email:office@yde.co.il vCard:Download vCard ]]> http://www.yde.co.il/Contact.aspx http://www.yde.co.il/Contact.aspx office@yde.co.il (I. Stern - Y.D.E. Engineers, LTD)