Croyden EFW — Temporary Roof Scaffold

At Croyden EFW the Principle Contractor asked our client if it would be possible to enclose an existing storage so that recycled waste could keep dry. We therefore came up with a solution of attaching a supporting scaffold to the existing concrete walls which we then covered with a HAKI Temporary Roof. As you can see from the photographs the temporary roof structure was extensive and therefore attracted high environmental loading. We took all of these elements into consideration and produced a design solution in order for our client to complete the works.

At Raptor we are proud to be able to offer bespoke design solutions for the most complex undertakings.

The Royal Hospital, Chelsea — Buttressed Access Scaffold

We were approached by our client to provide a scaffold design for roof repair work to part of the Royal Hospital in Chelsea. The design was made complex by the fact that we could not physically tie into the building, so we had to come up with an alternative solution. As you can see we designed a buttressed access scaffold which was completely independent of the building, but still allowed the contractors to complete their work safely.

At Raptor we are proud to be able to offer bespoke design solutions for the most complex undertakings.

Tamar Bridge — Hanging Scaffold for Bridge Repairs

The Tamar Bridge repair project presented us with its own set of unique design considerations to resolve. The initial discussions concentrated on suitable fixing locations for the scaffolding. However, these could not be extensive as the contact points also needed to be repaired/painted.

The next consideration was the buildability of the scaffold. The design had to enable the operatives to access all parts of the bridge trusses in the most practical manner for the scaffolders. As well as this consideration we had to be cautious not to exceed the allowable loading over each truss bay.

The solution, as you can see, was to utilise pre-fabricated 450mm Alloy Beams to span between hanging tube, which were secured to the underside of the carriageway girders. This allowed the operatives to access all areas of the bridge and carry out the necessary repair work from the safety of a solid scaffold structure.

At Raptor we are proud to be able to offer bespoke design solutions for the most complex undertakings.

Drawings (click to view full size)

Teignmouth — Temporary Pedestrian Footbridge and Staircase

Due to the poor condition of the existing footbridge, the decision was taken to commission a temporary footbridge in order to carry out the necessary works on the existing. The design of this temporary pedestrian footbridge, and staircase, presented us with many challenges to overcome.

Firstly, we had to establish how to fit such a structure in the confined space we had to work with. Secondly, we had to ensure that the structure could resist the applied loading and be built to the strict parameters stipulated by the client.

The solution, as you can see, was to build the footbridge and staircases out of Plettac Contur System Scaffolding. This ensured that the staircases and bridge satisfied the client's specifications, as well as providing a solid structure that the public would feel comfortable using. The bridge over the railway was created using four rows of the DESSA 1.3m HD Aluminium Beam with the Plettac Contur secured directly to them using right angled couplers. The Plettac Contur and the DESSA beams functioned well together, and allowed us to design the structure to the strict parameters stipulated by the client.

This is a further example of our ability to provide bespoke design solutions for the most complex undertakings.

Drawings (click to view full size)

Dawlish — Sea Wall Repair

During the turbulent winter of 2014 the Atlantic Ocean decimated part of the sea wall at Dawlish, severing the Rail link from Devon to Cornwall and therefore further isolating the South West of England from the rest of the country.

We were tasked with the design of a scaffold bridge to provide access from one side of the breach to the other, as well as providing a platform to lay the cables from the rail network, which were damaged as a result of the storms.

As you can see from the design and photographs below, we came up with a bespoke solution that satisfied both of these criteria and allowed the rail operatives to repair and re-build the sea-wall, often in extreme conditions.

At Raptor we are proud to be able to offer bespoke design solutions for the most complex undertakings.

Drawings (click to view full size)

Bristol — Harbourside Temporary Roof at Lloyds Bank

The design of this temporary roof scaffold at Lloyds bank in the heart of Bristol presented us with many challenges to overcome. Firstly, we had to establish how we could cover the triangular glazed structure, and ensure that the structure remained weather-tight.

To further complicate matters the roof had to be manoeuvrable in order to remove the existing glazing panels and replace them with new. The final complication was that the glazed roof sat on top of the roof of the bank which was 20m high and subject to high atmospheric loading. Therefore, considering all of the above, we came up with the solution that you see below; three separate rolling UBIX roofs that moved over one another, and were secured in place using buttress towers and several tonnes of kentledge.

Drawings (click to view full size)

South Crofty Mine

The South Crofty Mine project is an example of our design and build service.

We produced the scaffold design and calculations after an initial site visit, and were contracted in to oversee and manage the complete installation.

Drawings (click to view full size)

Lundy Lighthouse

The Lundy Island Lighthouse project presented its own set of design problems to overcome. Firstly we had to come up with a solution to raise the materials to the plinth level; secondly we had to establish how to cantilever the scaffold over the side of the side of the plinth, as it was not wide enough to support a full width scaffold; finally, we had to determine how to reach two lower sections where repairs to the Lighthouse were necessary.

As you can see from the design and photographs below this was achieved by using ready lock transom units turned upside down and bolted to the plinth in order to create a full width scaffold. The scaffold was then built from these, and secured around the light, as shown. This solution allowed the operatives full access to the glass sections, as well as access to the weather vane of the Lighthouse.

Drawings (click to view full size)