Another 4 km of CC-GRP BridgeLine® DN 300-400 and fittings were installed for the drainage of the Homeland Bridge. The third and final section of the line View on the completed Homeland Bridge in Zagreb leads from New Zagreb to the Homeland Bridge. This 3 km long section runs through a water protection area with Zagreb’s springs which meant that the high-quality pipes needed to be protected in a watertight concrete channel. Concrete supports hold the line every 5.8 m where it is fixed with stainless steel straps. An 8 mm thin EPDM layer was applied between supports, straps and the pipe to allow for small longitudinal movement due to temperature variations and to evenly distribute the pipe weight over the supporting areas. HOBAS CC-GRP SewerLine® running through a water protection area by the cohesive elements approach in a DCB had to withstand 477 kN (equivalent to 48 tonnes). Pressure tests on the pipeline inside the bridge were also hard to conduct because the bridge temperature kept changing, thus causing the length of bridge to vary constantly. The project was highly demanding for all parties involved. However, HOBAS specialists were present at all stages, providing support to the design engineers on a number of details. Site advisors helped the contractor during pipe installation, deliveries were made on time, and on-site changes were implemented with flexibility to successfully complete the project. More information: www.hobas.com HOBAS CC-GRP SewerLine® installed inside the bridge Main characteristics The longitudinal stiffness of CC-GRP pipes both saves time and money as it minimizes the number of necessary supports. The easily jointed push-to-fit couplings contributed to the savings since no welding is required for HOBAS products. All sections of the pipeline were tested with up to 9 bar of pressure. This was quite demanding for the manholes because the DN 800 blank flanges fixed to the tees with no additional support No43 September 2008 / JEC Composites Magazinehttp://www.hobas.com http://www.selcom-srl.com http://www.selcom-srl.com