Elena is coming

Posted on: 09 April 2020

Elena is coming! Blackburn and Roberts have always been innovators. The Rowsander Path Pipe was a product for the 1980s The Kingshurst Bypass kerb for the 1990s The Nib Nobbler tool the 2000s by storm and the Servisafe Data Duct caused waves in the 2010s Now Elena is coming. A unit to collect water which has percolated though permeable drainage. Embedded in an impermeable coating it is completely covered by the permeable surface – except for access and rodding points. Water enters through openings in the side walls and travels along the duct to be discharged into drains.  

Galvanise Or Paint

Posted on: 02 April 2020

At some point the finish on the steelwork arises on every project. The choice is between painting or galvanising. Our clients favour galvanising. This is a process which offers the best long term protection. Painting is less resistant to vandalism and when it is vandalised it looks worse than a galvanised finish. Both finishes look good with wooden deck and parapet When we make trusses the galvanising gets inside the sections and stops them rusting from the inside out. Installers also prefer the galvanised finish as it is less prone to damage during delivery and installation. When used by Utility Companies they prefer the galvanised effect. Future Maintenance costs are a major issue. It is difficult and expensive to repaint a bridge in position. Preventing pollution of the river/reservoir is costly. A painted bridge will need a re-paint every 15/20 years but galvanised steelwork will last for up to 70 years before it needs attention.

Why is drainage of Cattle Grids important?

Posted on: 11 March 2020

Cattle Grids drainage is often neglected. Huge amounts of silt and other debris can be quickly washed into and remain in the pit. Filled pits are the most common reason for the escape of stock.   In winter frozen water can bridge the grid and lead to dramatic stock escapes. From a road safety point of view this is an ice hazzard. Car drivers don’t mind flooded grids but cyclists have their reservations.    

Secure ducting for sensitive cables

Posted on: 04 March 2020

Routing data cables across existing concrete structures is a challenge. Due to the structural constraints digging into the surface is very constrained. Shallow excavation leaves the cable vulnerable to damage. Increasingly Telecom Engineers are using our Servicesafe Data Duct. With strength we get weight issues and we supply units in lengths which do not create difficulties with Manual Handling Regulations This incredibly robust enclosure has socketed ends. These are sealed with mastic providing a degree of flexibility in the event of ground movement. Obstacles can be bypassed with a range of standard units and we are always pleased to make non standard units in the event of Client Need. The adaptable system copes with changes in gradient. It can also handle curves and all with a weather proof permanently sealed joint The wide range of joints meets most needs and our Designers quickly develop solutions to new requirements (on the fly) and working...

Vandal Resistance of bridges

Posted on: 26 February 2020

Sadly some bridges suffer from vandalism. It is not as common as people believe. It takes many forms. Graffiti is the most common. There are paints from which graffiti can be wiped off.   Fire can be a local problem and once it starts it is hard to prevent repetition. We recommend the prevention of a build up of debris under the bridge. Not all fires are deliberate. Attempts to remove parts or even dismantle sections have been known but the use of anti-vandal fixings on sites with a known problem can manage this. We also combat this by recessing fixings in the deck and parapet whenever possible. We have to be careful that our efforts to make bridges vandal resistant don’t prevent inspection and maintenance. some bridges appear to be more vulnerable. Softwood obviously burns more easily. Suspension bridges can be wrecked if the cables are compromised. It is not always the “roughest” sites which suffer most. A couple of years a...

Kinghurst Bypass kerb saves the day during floods

Posted on: 21 February 2020

Historically when breaking waves deposited water on the promenade at Trearddur Bay in Anglesey the water ran down the road and flooded the town centre   Working the Atkins we developed a solution. By providing an exceptionally large road hump with a huge Kinghurst Bypass Kern along its edge. We tamed the beast. The water runs down the road and is stopped by the road hump. The camber guides the flood water to the Kinghurst. The Kinghurst collects it and channels it past the hump and sends it back onto the beach. The above image shows the unit performing perfectly in the recent Storm Denis            

Why use Cambered Bridges?

Posted on: 19 February 2020

Cambering bridges improves their appearance. By being less straight they fit better into rural environments where there are very few straight lines. The particularly attractive bridge above in Orston was supplied to a Local Community Group. They raised funds by selling a parapet spindle to each villager which had their names burned into them. The timber was Oak. Many Clients like the “feel” of oak. Designers love cambering bridges. It has no impact on the installation   Cambering bridges also makes them marginally stiffer. This is partly by stressing the steel and partly due to the virtual increase in the effective depth of the beams It can disguise differences in levels between banks. A lot of people find them more attractive The beams are rolled under immense pressure by specialists.  Sadly, the cost of transport and the rolling costs, when cambering bridges add a significant sum to the project cost. Beams can be formed f...