CAS Tower
A temporary, multi-purpose structure tied to a high-rise building during construction, CAS Towers enable all hoisting facilities to be arranged around and tied to it.
We design and supply custom-engineered CAS Towers for projects of any level of complexity. Large-scale, high-rise projects require substantial hoisting facilities to provide an adequate flow of personnel and materials to the various work faces. In traditional configurations, hoists that are directly attached to the building can require several metres of cladding to be left off the façade during its construction.
THE DIFFERENCE - With a CAS Tower, only small areas need to be allowed for where it's tied in to the main structure façade, with all hoisting attached to it rather than the building under construction.
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One of the possible applications of the CAS system is high-rise construction. Providing efficient access, the CAS Tower is a temporary structure tied to the building under construction - 70+ storeys or in excess of 500m high - that ascends jointly with the main structure as works progress. This enables all hoisting facilities to be arranged around and tied to the temporary access system, whilst only the system itself is tied into the main building.
It provides a common access area for all trades and goods, whilst reducing the need to leave openings for access into the building, thus reducing time for façade work to be completed. Hoists of varying sizes can be attached to all three of the open sides of the tower (up to 6 in total) and many also incorporate an escape staircase as well.
CAS Towers can also provide temporary access to existing buildings. This is particularly useful for refurbishment works, where hoisting tie in options are limited and ground space is tight.
Benefits of working with a CAS Tower
- Modular - can be configured to any size or shape of building, and heights in excess of 500m
- Can be used for heavy-duty loading and transport of goods + personnel
- Less disruption to façade works - a standard size CAS Tower formation has three open elevations that can accommodate up to six hoists and requires only a two to three-metre-wide opening for tie-ins to the main building
- Accelerated build programmes:
- The concentration of hoist access in only one area allows for cladding around the whole façade of the building to be completed faster, leaving only the small access points for the CAS Tower ties
- Allows for fit out of the lower floors to be completed as construction proceeds at the upper levels. This results in earlier handover of completed sections of the building.
Future-Forward
With the number of new skyscrapers and tower developments set to climb in coming years, contractors need multi-functional access solutions more than ever before. CAS Towers and hoist schemes make the construction or refurbishment of high-rise, inner-city structures more efficient in terms of cost and build time as the combination greatly improves construction logistics due to minimum interference to the programme of works.
As we manufacture the CAS Tower using alloy, it is lightweight and easy to pre-construct floors at ground level before lifting into position. Alternatively, it can be constructed using manual handling where cranage isn’t possible. Despite its light weight however, its inherent load-bearing capacity is one of the main features.
FAQS
How safe is the CAS tower?
The entire CAS System has undergone extensive development and testing to ensure it is safe and compliant for European and World markets. The System is manufactured with a rigorous quality manufacturing process and is extremely strong and safe. CAS worked with the University of Southampton Research Institute for Industry (RIFI) conducting several destructive tests to determine the buckling load of the leg stanchions of the CAS Tower System. These tests used the University’s column testing machine in the Heavy Structures Laboratory to determine its robust safety profile.
Our unique system has a rigorous quality manufacturing process, full ‘Technical File’ and ‘Declaration of Conformity’ certification. In addition to providing bespoke design and configuration for each project, we also offer an independent Category 3 design check from an experienced consulting engineering company.
How does the CAS tower work with hoists?
It is used in conjunction with rack and pinion construction hoists of varying cage sizes and load bearings to provide access from the hoist cars into the building under construction. The hoists also provide a means of transmitting the tie forces from multiple hoists to common tie points on the building structure.
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What Codes and Standards Apply to Use of the CAS Tower Temporary structure?
The CAS system is designed as a temporary structure using the principles of BS5975:2008 “Code of Practice for Temporary Works Procedures and the Permissible Stress Design of Falsework”. To achieve the low component weights required for manual handling, extensive use is made of aluminium components and these are designed in accordance with BS 8118: Part 1:1991 “Structural Use of Aluminium”.
What are the main features of a CAS Tower?
- Accommodates conventional twin-car, single mast hoists or large twin-mast, single car hoists on any of its faces
- Modular design, capable of adaption to different sizes and shapes to suit various site conditions and to accommodate twin hoists with cars up to two metres wide
- Erection and dismantling either by manual handling of all components or by crane handling of large sub-assemblies
- Particularly useful in high-rise builds, can be used on buildings of 70+ storeys and height in excess of 500 metres.
Request our CAS Brochure here