What exactly is formwork for? A formwork system is used in the building industry to envelope the concrete during casting and contribute to the grip and hardening, that is the two phases the material passes from the fluid to the solid state and develops the mechanical characteristics necessary to perform its function.
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The invention of formwork dates back to the early days of our civilization’s construction activities when building materials were much simpler, such as clay.
People have always used formwork to build more or less complex structures, but it is only in recent decades that studies, techniques and materials have enabled us to develop advanced tools.
Over the construction sector you may find a number of different systems designed to meet different market demands and specific needs: formworks for walls, floors, curved walls, pillars and special designs.
In turn, formworks can be categorized according to the materials they’re made of – wood, metals or plastic compounds – and the technology they use: frame, beam and modular.
Frame formworks are composed of a panel and a perimeter, aluminum or steel as it may be, which guards and protects the edges from mechanical stresses. They stand out for their robustness and consequently for their reusability and durability over time. However, they are also easy to assemble thanks to the predefined mounting diagrams.
Beam formworks are composed of planks that support the deck and are adaptable to any project and ideal for surfaces without imperfections when the surface finish of the concrete required is “fair-faced” (béton brut). The assembly is more complex than frames with longer times, but it is also an alternative characterized by higher load capacity and high flexural strength.
Circular formworks are a very versatile category of systems consisting of pre-assembled standard modules that allow you to quickly assemble circular walls with any radius of curvature as happens with ramps, silos, tanks and purification plants.
Special formworks are tools made according to a specific project, where the dimensions fit right in the construction site as needed and more formwork systems can be integrated with each other to enhance their functionality.
The formworks can also be classified for the main function they offer, generally in formworks for vertical structures and formworks for horizontal structures.
Formworks for vertical structures, often also called wall formworks, are solutions adaptable to every need, construction site condition and use to create walls, pillars, elevator shafts, batteries, pulvini, bridges and foundations.
Condor wall formworks are: Comax, large panel for any use, Optimo, practical and manageable formwork, Adatto ALU, modular and versatile formwork, Haliform, ideal for the casting of foundations, walls, pillars and beams, O-ROUND, formwork for curvilinear walls, circular metal formwork for the casting of pillars and columns, Beam Flex formwork, modular beam formwork that allows any type of configuration.
In addition to these solutions, the MF ramp system and the OMNI earth-retaining system must also be included to be combined with different types of formwork to meet more complex construction site needs. Earth-retaining systems can be assembled following different combinations and used with wall formworks in particular for the casting of single-sided walls.
The SRC-240 rampant support system is a quick and safe solution for casting on a higher level and when structure heights become challenging it can be an affordable alternative to propping towers.
Formwork for horizontal structures, or even slab formworks, are structures designed with the aim of supporting the concrete casting for the slab construction and generally consist of horizontal supporting structures, on which the cladding panels are placed in contact with the casting, which transfer the loads to an underlying support system.
Each formwork in the Condor range is absolutely safe, characterized by manageability, modularity and high quality finishes. Our slab formworks are expertly designed to offer greater safety on site and allow construction companies and designers to get excellent results, reduce costs and processing times.
Our slab formworks are Aludeck and Aluplus, modular aluminum formworks, manageable, and therefore transportable without the need for cranes, which allow early disassembly with consequent positive effects on processing times and costs.
For more information, please visit Formwork Material.
20 Flex is an affordable system consisting of props, fork heads and wooden beam frames on which panels are fixed. It requires few elements and, thanks to the free design, is adaptable to any shape, height and thickness.
The Eco System for free-designr slabs offers the possibility of early disassembly, drastically reducing time. It consists of a few elements, adaptable and can be integrated with different panels depending on the degree of finish of the concrete required.
Multiportal is a table system with a pre-assembled structure that is particularly affordable and ideal in the case of large slabs or for the realization of repetitive plans that require simplicity and functionality.
ECON, CEP 10, CEP20, CEP30, D55, ALU CP props complete the offer of Condor slab systems. Handy and versatile, they cover heights ranging from 1.80 to 6 meters and can be used in conjunction with the main systems in the range.
The choice of the most suitable formwork system for your business or single construction project is determined by a number of factors to be considered carefully and professionally: budget and costs, size of the company, number of uses expected, characteristics of the project, type of construction and conditions of the construction site, desired finish, experience of the workers, crane availability, time.
The following is something you should consider prior to commissioning any project:
It is best to always bear in mind every and all formwork types while in the design phase so that you can make the best and most valid decision.
Formwork is a temporary structure that supports part or the whole of a permanent structure until it is self-supporting. Once assembled the components form the temporary structure. The most common method of keeping the formwork in place during casting is to use a supporting scaffold system. When scaffolding cannot be used, lifting equipment can be used instead. Bygging-Uddemann has the most comprehensive systems in the business for this kind of works. Our systems are suitable for practically all kinds of heavy loads whose placing or removal require a high degree of precision.
As construction methods evolve, the use of lifted formwork / formwork for heavy lifting equipment has become common among the leading construction companies in the world. Generally, strand climbers and hydraulic steel rod climbers are used for lifting and lowering of formwork. Construction projects requiring formwork are lifting of roof and steel structures, cranes, bridges, bridge sections and more.
Let’s learn more about formwork for heavy lifting equipment, the material types and requirements for a good formwork.
Many different kinds of concrete formwork are used in construction. The type of formwork system used for construction largely depends on important factors such as the types of the structure to be built, as well as the material to be used. Some of the different types of well-known formwork are slab formwork, column formwork, beam formwork and more.
Timber and plywood are used in traditional timber formwork to form the pouring moulds. While this method is cheaper, it isn’t as effective because wood is not as strong and durable as metal or steel. The timber should be lightweight, well-seasoned, easily workable with nails, as well as free from loose knots. Still, complicated sections of buildings requiring great attention to detail, utilize timber formwork.
Generally, prefabricated moulds made from metal frames of steel or aluminium are used in engineered formwork systems. It is cheaper and quicker to use than traditional formwork. The added benefit is that these frames are extremely cost-effective, strong and durable, and rarely need replacement. The construction of engineered formwork is faster and requires less manpower, saving time and money. Simple structures can be built with reusable plastic formwork systems, consisting of interlocking, lightweight and strong systems.
Stay-in-place formwork is used for supporting parts of a structure. This type of formwork consists of insulating concrete forms that are filled with reinforced concrete and are left in place once they are set.
Last but not least, concrete formwork is what is mostly used in modern construction. Although there are different types of formwork available today, concrete is the preferred option. When reinforced, concrete is a virtually indestructible material, making it the perfect choice for major construction projects, as well as small, complex and detailed structures.
Formwork construction should be efficient enough to be able to retain its original shape. When it comes to formwork, construction businesses should be able to select the type most suited to the structure to be built. While there are many formwork systems available for use today such as beam, column, plastic, slip form, cassette, climbing, flexible and horizontal formwork, the last option is found to be the most widely used.
Good formwork should satisfy all the following requirements listed below:
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