BIG BLUE trading & contracting

POST BOX 200147



+974 5532 5075

+974 3372 8945

architectural expansion joints

Steel Grade: ASTM A615/A615M, Gr40, Gr60, Gr75
Coating: Fusion-bonded epoxy
Coating Standard: ASTM A775/A775M, ASTM A934/A934M
Normal : upto 40 mm dia

Project Approvals: Ashghal, Hamad International Airport



Customized & ready made uPVC End Caps and sleeves are provided to suit the dowel bars

stainless steel Dowels & REBARS

Modular Expansion Joint Systems

We stock large quantities of stainless steel dowels on 20, 25, and 32 mm dia in Alloy 1.4436, 1.4362, 1.4404 etc Grade 500 Mpa. Our product is used in many major projects in Qatar. Our warehouse stocks various sizes of stainless steel rebars. We offer sizes from 12 to 25 mm dia mm. 

​Project Approvals: Qatar Rail, Ashghal, Kahramaa

​​​Big Blue located in Doha – Qatar is one of the leading suppliers specialized in promoting structural engineering products under the management of highly qualified, experienced and trained professionals. Big Blue prides itself on implementing engineering solutions that achieves our client’s objectives, and is environmentally sustainable to wider domains, including oil & gas, buildings, infrastructure sectors. Our business is founded on the principles of completing customer service and quickening the delivery of products. Big Blue has collaborated with world’s best manufactures, for all complex solutions for infrastructure and real estate projects. Whether hospitals, tunnels or bridges, stadiums, metro projects or event buildings, airports, high-rise buildings or shopping malls, express ways, power plants or wastewater treatment plants – Big Blue shall provide solutions for building the Qatar of tomorrow. Our products are widely used in Tunnels, Roads & bridges, High Rise Buildings, Stadiums, Car Parks etc. Few of our products, includes, but not limited to are: SS dowels, SS rebars, SS mesh & SS couplers, SS pipes, Bearings & Expansion Joints etc. Big Blue develops a close working relationship with each client, fully understanding their needs and employing innovative, cost effective, and practical solutions. Very often our team works as an integral part of the client/project team. We are committed to delivering the right solution to meet each client’s individual needs, Big Blue is the right partner for all your structural engineering requirements. 


We provide optimal design solutions for cover plates, expansion joints and movement solutions for construction. We have supplied our products for Doha Metro and work closely with architects and specifiers to continuously improve our products and customise solutions for your situation.

The Modular Expansion Joint System (MEJS) is a mechanical device installed in bridge expansion joint openings. The primary function of the MEJS is to permit vehicle traffic to travel smoothly across large expansion joint openings. It does this by dividing the large expansion joint openings into a series of smaller openings called cells. 

Bridge bearings are devices for transferring loads and movements from the deck to the substructure and foundations. In highway bridge bearings movements are accommodated by the basic mechanisms of internal deformation (elastomeric), sliding (PTFE), or rolling. A large variety of bearings have evolved using various combinations of these mechanisms.


dowel bar end caps & sleeves