Luas Line B1 (Green Line)

Steconfer participated in the construction of 17 km of a single track of light rail line system with 1435 mm gauge including: 

• 3500 linear meters of single ballast track - built with the supply of 10.100 tons of calibrated ballast, 4.000 monobloc sleepers with 8.000 Vossloh fastening system type Skl 14, 343 tons of vignole S49E1 rails, 12 turnouts with point heating system and special track equipment including twist rails, normal and isolated rail joints and transition rails to allow a perfect transition between the vignole and grooved sections; 
• 8400 linear meters of single embedded track - built with the supply of 11.000 cubic meters of C40/50 concrete, 1. 175 tons of rebar, 118 tons of rubber encapsulated grooved Ri54 rails and 865 tons of encapsulated grooved Ri59 rails, one encapsulated Ri54 grooved rail diamond crossover with point heating system, special track equipment, complete rubber encapsulation of all the system, 12 pairs of encapsulated grooved Ri54 expansion joints, embedded transversal and longitudinal drainage and a system for derailment prevention on the structures (bridges and tunnels) - tram arresting devices. All the embedded system was assembled and applied in panels put together with steel sleepers;
• 3200 linear meters of single plinth track - built with the supply of 1.200 cubic meters of concrete, 91 tons of rebar, 314 tons of vignole S49E1 rails, 12 pairs of vignole rail bridge expansion joints, 10.000 Vossloh fastening systems type 336 and special track equipment including twist rails, normal and isolated rail joints and transition rails to allow a perfect transition between the vignole and grooved sections;
• 1800 linear meters of single ballast track inside the Sandyford Depot to increase the number of stabling lines - built with the supply of 7.000 tons of calibrated ballast, 2.000 monobloc sleepers with 4.000 Vossloh fastening system type Skl 14, 177 tons of vignole S49E1 rails, 10 turnouts with point heating system and special track equipment including twist rails, expansion joints and normal and isolated rail joints;
• Overhead Conductor System to be operated at a nominal tension of 750 Vcc on the complete 17 Km of single-track including OCS poles (lateral & axis), bracket arms, cross span & stitches, pole tensioning equipment mechanism, wall fixings & building anchors, overhead line equipment including conductor and feeder system including the connection to the OCS;
• Overhead Conductor System sectioning on the Sandyford Depot including splitting the OCS power feeding the PIT and SLAB lanes into two separate sections per lane and all associated works ;
• Modification to the existing track system (and tram stop) at the Sandyford terminus. This work included the extension of the existing Sandyford stop embedded track in more 16 meters made of special panels with a special composite finish to meet the existing surface. Once there was a loop located on the extended area, the rebar on the panels was replaced by glass fibre cables to ensure the same strength and durability without compromising the loop operation;
• In the vicinity of the Sandyford Stop, installation of one trailing non-motorized switch, three sets of motorized facing switches and four sets of non-motorized points, set for spring operation to facilitate normal reversing operations at the stop;
• On the Sandyford Depot, installation of one trailing non-motorized switch and nine sets of motorized facing switches operated by the tram drivers;
• Installation of two trailing non-motorized switches and a track crossover located between the running lines in the vicinity of the Gallops tram stop for emergency and occasional operational use;
• Installation of two trailing non-motorized switches and a track crossover located between the running lines in the vicinity of the Carrickmines tram stop for emergency and occasional operational use;
• Installation of a set of scissor points in advance of the Brides Glen terminus comprising one set of motorized facing switches and three sets of non-motorized points set for spring operation to facilitate normal reversing operations at the stop;
• Additional sidings and turnouts to stable 23 n° 53-meter-long tramcars including all necessary works to support their operation at the existing Sandyford depot;
• New OCS inside Sandyford Depot and do all necessary changes do integrate including poles, suspensions (GRP bracket arms), anchoring, section insulators and contact wire; 
• Feeder cables and return traction along 7.5 km of double track, including trackside distribution cabinets and track disconnector switches besides this, it was a requirement of the contract that these new works ensured a perfect interface with the existing Luas system; 
• Compatibility, interoperability and tram services with existing Luas infrastructure.
• Assurance of maintenance requirements;
• Assurance of noise and vibration requirements throughout the installation of encapsulation on all the embedded systems and rubber mats in critical locations;
• Assurance of an adequate electrical insulation system to minimize the leakage of electrical currents to earth in accordance with the stray current earthing and bonding requirements.