MACSTEEL Trading entered into an agreement with Europe’s leading supplier, inventor and patent holder of cellular beams, ASDWestok (Ltd). Cellular beams have proved to be one of the most significant developments in steel construction since their introduction in 1987. They have been used in over 6000 projects in over twenty countries. Cellular beams can be used in a variety of applications. Their primary use is as secondary floor beams to achieve long spans and service integration.
They are used as roof beams beyond the range of portal-frame construction, and are the perfect solution for curved roof applications, combining weight savings with a low-cost manufacturing process. Cellular beams provide a very economical method of producing tapered members, which have been used extensively in sports stadiums. They can also be used as gable columns and wind-posts. They are available in Africa and the Indian Ocean Islands through Macsteel Service Centres S.A.
- Clear Longer spans (column-free)
- Faster fabrication and erection
- Easier servicing
- Service Integration
- Reduced number of foundations
- Curved beams
- Shallower construction
- Good dynamic performance
- Flexibility for the client
- Floor Beams
Cellular Beams are most commonly used as floor beams; this enables the designer to achieve long clear spans, service integration and a shallower overall floor depth. With cellular beams clear spans varying from 12m to 20m can now be easily achieved at the same depth and cost as short spans. Long spans often require the specification of costly pre-cambers but cellular beams can easily be pre-cambered as part of the manufacturing process without any additional costs.
- Roof Beams
Most applications of cellular beams in South Africa are as roof beams. This has been influenced by the demand within the commercial sector for shopping malls, motor dealerships and sports facilities. Cellular beams are a perfect solution for curved roof applications, combining a considerable weight saving and a low cost curving process which eliminates the need for a specialist section bending company. In projects where cost and speed of erection have been the deciding factors, without exception cellular beams have been used in preference to traditional clear span solutions; such as lattice trusses, stub girders and tapered plate girders. This is simply due to the fact that cellular beams require much less fabrication time, their lightweight and also much shallower than the traditional clear span solutions.
- Curved Roofs
The relative economy of cellular beams is greatly enhanced in curved roof applications. The structural efficiency and economy of curved cellular roof beams in clear span structures makes them eminently suitable for use in many applications. Curved cellular beams combine a considerable weight saving compared to plain sections and a low-cost curving process as most beams are curved in-house at little or no extra cost.
- Tapered Beams & Cantilevers
Cellular beams provide the most economical method of producing tapered steel members. Tapered beams are produced by profiling the web along the diagonal, then swinging the tees around to produce a tapered beam with uniform cells or cells with diameters varying according to the degree of the taper. Tapering the ends of a cellular beam also creates an attractive feature to the exposed overhanging ends.
As building height increases cellular columns become increasingly more economical as compared to universal columns.
- Parallel Flange Columns
High-bay columns in today's 'super-sheds' are a particular suitable application, where the increased inertia of cellular beams will minimize the deflection of the tall column. Cellular columns are most efficient in cases where the axial loads are small, such as gable columns, portal legs, wind posts and valley columns.
- Tapered Flange Columns
The initial decision to use any form of tapered column is most likely to be influenced by aesthetics. But once a decision has been made to use tapered columns, a cellular column would be the most economical solution. There are no restrictions on the shape of the taper and cell diameters can be uniform or can vary in proportion with the degree of the taper.
- Car Parks
In car parks the long spanning ability of cellular beams help create a building with minimal internal columns. This enhances the feeling of security as the area is more open and will have few barriers to sight lines. In addition, cellular beams can also be pre-cambered at no extra cost during production in order to offset the proportion of the dead-load deflection. Large pre-cambers allow for natural drainage of surface water, eliminating the need for additional screed. The large circular openings accelerate smoke dispersion as compared to solid-web beams and also make provision for service integration.
- Sports Stadiums
The clear long spanning ability of cellular beams provide a structurally efficient and economical solution to stadium roofs. Cellular beams are much lighter and shallower than other clear span solutions, making them eminently suitable for use in many sporting facilities. Through tapering the beams an attractive feature can be created, which is not only aesthetic but structurally efficient as well.
- Transport Facilities
- Bridges, Scrapers & Conveyor Gantries
- Advertising Posts
Design Guides and Software
Office Based Design Services
Macsteel Trading has an office based design service to provide advice and full design assistance. To help optimize the designs on specific projects and to assist the engineers to gain familiarity and expertise in cellular beam design, Macsteel Trading's engineers will attend to project design meetings.
In-house technical seminars can be arranged to promote the efficient design of cellular beams and proficiency with the associated design software, CELLBEAM.
All cellular beam designs are carried out using analysis program, CELLBEAM, written by the Steel Construction Institute (SCI) in the UK. The structural integrity and design criteria have been verified following full scale destructive tests under the supervision of the SCI. The program is available free of charge and is enhanced on a regular basis. As part of the through-life quality management of the software, CELLBEAM will automatically check itself using internet communications to see if a new version is available, and warn the engineer accordingly, offering an automated update.
Our design service and technical support is offered without charge or obligation. Please do not hesitate to contact us.
Macsteel Trading has an office based design service to provide advice and design assistance. To help optimize the designs on specific projects and to assist the engineers to gain familiarity and expertise in cellular beam design, Macsteel Trading's engineers will attend to project design meetings. All cellular beam designs are carried out using the analysis program, CELLBEAM, written by the SCI in the UK. The structural integrity and design criteria have been verified following full scale destructive testing at Bradford University in 1988, Leeds University in 1995 and the University of Manchester Institute of Science and Technology (U.M.I.S.T) in 2000. Tests have also been conducted locally as well; one at the University of Natal in 2001 and the other at the University of Pretoria.