Technical Expertise

Multidisciplinary teams comprising of specialists across ten industry sectors, we have the expertise necessary to grapple with challenging assignments.

View all sectors


Commitment to Clients

Our business is built on relationships, and our clients will always be our top priority.

View all Projects

Featured Project

Silvertown Tunnel London UK

Silvertown Tunnel
One of the largest engineering projects in the world.

learn more

Who We Are

International Award-Winning Engineering Consultants who deliver ground breaking solutions at the forefront of industry best practice.

learn more

Our Regions

Carbon Reduction Plan

About - office locations image

Our Commitment to Net Zero
Ayesa is committed to becoming a net zero engineering consultancy by 2040

learn more

Stay Up-to-date

Stay on top of the latest developments, appointments, awards and more across all our offices.

View all News

Featured News

MicrosoftTeams-image (76)

On 19th October 2023, ByrneLooby will rebrand to Ayesa

ByrneLooby will officially adopt the name of its parent company, Ayesa, a global engineering and technology services provider.

Learn more

Investing In Our People

Cultivating a culture in which individual differences and the contributions of our staff are recognised and valued.

meet our people

Our EDI Policy

Careers - Image

Celebrating People
Fostering a culture where you are encouraged to be yourself.

learn more

International Presence

Multidisciplinary team comprising of specialists across Ireland, UK and the Middle East.

Follow us:

  • LinkedIn - blue70px
  • Twitter - blue70px
  • Facebook - blue70px
  • Instagram - blue70px
  • Vimeo - blue70px
  • Issuu - blue70px


Contact Us

We would love to hear from you. Please fill in the quick contact form below.

Send a message

Royal Commission Bridges

Royal Commission Bridges

The Royal Commission in Jubail (RCJ) plans to construct two new bridges: one from Jalmudah to Al-Batinah Island (Battinah)and the other from Dareen to a nearby unnamed island (Dareen). Batinah is a 4-lane bridge proposed to replace an existing causeway to allow increased access to Abu Ali Island. Darren is a 2-lane bridge designed to replace a smaller existing bridge to lined the mainland to an island with oil production facilities. Both bridges have been designed with a 60m main span to clear a 40m navigational channel to allow safe navigation of vessels up to 15m in length.

Royal Commission Bridges

Our Role

Ayesa in association with FAEC was commissioned by the RCJ to undertake the detailed design of both bridges, the approach causeways, the marine works including lining the channel, protection for the piers and navigation aids. Detailed assessments included carrying out a detailed study for the form, shape and location of both bridges. The location and height of each bridge were determined considering the existing causeway and bridge remaining in operation until each was opened.

Extensive geotechnical investigations were carried out to ensure the optimum piling solution was found for all piers in varying ground conditions. The long-term settlements of the approach embankments were also taken into consideration. Extensive studies were also done on the possible construction methods for constructing the pile caps and piers in the marine environment. Both bridges were designed using post-tensioned concrete box girders of uniform depth – each carrying 2 lanes of traffic, with inclined piers supporting the spans over water and vertical piers for spans over mudflats.

Royal Commission Bridges 2


We provided a range of consulting advisory services and design services, including bridge structures, causeways, embankments, shoreline protection, roads, deep foundations, subgrade improvements, design vessels and collision loading. With our in-house multidisciplinary team, we also supervised the ground investigation works. The bridges were designed around a principle of ‘balanced aesthetics”, combining striking design that blends seamlessly with surroundings and delivers constructability and cost-efficiency.

Cost efficiencies and value were further enhanced by our in-house collaboration across multiple disciplines and phases from the initial concept studies to the detailed design, integrating architectural and engineering design, structural, geotechnical and marine and coastal expertise.

Royal Commission Bridges 3

We support your projects

Our goal is to provide you with the best services for your needs