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steel formwork

steel formwork

● what is steel formwork

Steel formwork is a commonly used construction formwork made of steel. It is typically utilized for the construction of concrete structures, such as walls, beams, and slabs.

The steel formwork system is composed of multiple steel panels, providing high stability and rigidity. Compared to other types of formwork, it is more durable and capable of withstanding higher loads and pressures. This makes the steel formwork system widely employed in large-scale, high-rise buildings, as well as projects with higher load requirements

Steel formwork installation and dismantling are relatively simple, and they can be reused multiple times. This reduces the construction period, improves construction efficiency, and saves costs. Moreover, Steel formwork offers high flatness and accuracy, enabling concrete structures to achieve the desired shape and dimensions as per design requirements.

Furthermore, Steel formwork can be combined with other formwork systems such as wooden or aluminium formwork to meet various architectural forms and structural requirements.

Steel formwork components consist of Wall Panel, Rocker, Kicker, Stub pin, External corner, internal corner, Beam side, Beam bottom, Prop head, slab, Mid-beam, Soffit length, and slab prop head. They are suitable for load-bearing walls, columns, beams, stairs, balconies, etc., that can be completed with one concrete pouring.

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● Steel formwork components

The steel formwork system comprises of a panel system, support system, fastening system, and accessory systems. This formwork system exhibits high hardness, long service life, excellent performance, and low usage costs, thereby significantly enhancing construction efficiency and quality.

1. panel system
The panel system forms the enclosed surface required for concrete structure construction.

steel formwork Bunnings

2. fastening systems
The fastening system enables adjustment and securing of the entire steel formwork system, thereby enhancing construction efficiency and accuracy. It ensures that the steel formwork remains free from deformation, swelling, or bursting during the pouring process. Additionally, the fastening system should possess reliable safety and wind resistance capabilities to ensure stability and durability of the steel formwork in construction during its usage.

steel tie rod formwork

3. support systems
The support system plays a crucial role during the construction process of steel formwork, ensuring stable support for floor slabs, beam bottoms, and cantilever structures.

steel props formwork

4. accessory systems
The accessory systems include formwork steel cone, steel pegs for formwork, steel formwork clamp, steel formwork ties, etc., which can integrate individual steel formwork into a cohesive whole. The accessory systems ensure a strong and reliable connection between steel formwork, creating a harmonized structure during the construction process. This method of connection not only enhances the stability and rigidity of the steel formwork system, but also improves the load-bearing capacity and safety of the overall structure.

steel pegs for formwork

steel formwork advantages:

1. High Strength: Steel formwork for concrete is made of high-strength steel, providing excellent load-bearing capacity and deformation resistance. Compared to formwork made of other materials, steel formwork for concrete is more capable of withstanding the self-weight and construction loads of large-scale concrete structures, ensuring structural stability during the construction process.

2. Good Durability: Steel formwork for concrete exhibits properties such as durability, and corrosion resistance, enabling it to withstand prolonged usage and meet construction requirements under various environmental conditions.

3. Excellent Adjustability: Steel formwork for concrete employs a detachable structure, allowing for adjustments and combinations based on specific construction needs. The dimensions, shapes, and heights of the formwork can be flexibly adjusted to accommodate the requirements of different building structures.

4. Excellent Concrete Surface Quality: Steel formwork for concrete features a smooth and even surface, eliminating issues such as mortar leakage during concrete pouring. It allows for the attainment of high-quality concrete surfaces, enhancing the appearance and quality of buildings.

5. Steel formwork for concrete possesses high stability and safety, capable of withstanding vibrations and loads during construction. Its connection methods are reliable, minimizing the risk of detachment or collapse, thus ensuring the safety of the construction site.

steel formwork for concrete
reinforced steel formwork

● Why use steel formwork?

1. technical aspects:3D technology can convert traditional 2D plan drawings of buildings and structures into 3D models, allowing for visual expression and communication. This helps to identify design errors in advance and reduces unnecessary changes and rework.

2. terms of progress: using steel formwork panels can greatly increase installation speed, with approximately 4 days per floor compared to 8-9 days per floor using wooden formwork. This faster pace helps to control costs effectively.

3. management perspective: steel formwork panels reduces the number of management personnel required by half compared to traditional formwork.The management process is also simplified, promoting the scientific construction and precise management of the building project.

4. Regarding quality:steel formwork panels ensures that the roof is level, the corners are square, the walls are vertical, and the beams are straight. The visual appearance meets relevant quality standards and there will be no formwork bursting phenomenon.

5.Regarding safety: the use of transfer boxes reduces the need for tower cranes to transport materials and avoids safety risks associated with the use of unloading platforms.

6.In terms of civilized construction: after dismantling steel formwork panels, the amount of building waste is reduced and floor cleaning is easier. The project meets environmental protection requirements, promoting resource conservation.

7.indirect costs: the rental and management costs of auxiliary materials and machinery are correspondingly reduced, thereby improving economic efficiency.

steel formwork concrete slab
steel formwork for concrete walls

● Knowledge

★Is steel formwork better than wood formwork?
In timber formwork construction, disposable materials are commonly used, which is not in line with the modern concept of resource conservation and leads to increased cost expenditure. Steel formwork vs timber formwork, formwork of steel can be reused, which fundamentally achieves resource conservation. It can effectively leverage its advantages in high-rise buildings and complex construction environments, improving construction efficiency, ensuring construction quality, enhancing construction precision, and exhibiting environmental characteristics. The use of formwork of steel can guarantee the standards and quality of construction projects.

1. Formwork of steel can be reused and has a long lifespan.
2. Steel precast formwork provides a stable structure. Once assembled, it forms a solid framework with excellent stability and high load-bearing capacity.
3. Formwork of steel requires fewer supporting rods, allowing for a larger on-site working space, smooth movement of personnel, convenient material handling, and significantly enhancing on-site management efficiency.
4. After demoulding, the concrete surface achieves a smooth and even finish, eliminating the need for secondary plastering.
5. Formwork of steel has a wide range of applications and can be designed as circular steel formwork, steel formwork for column, suspended slab steel formwork, steel formwork stairs, steel formwork shutters, etc. It is suitable for various construction projects such as residential buildings, infrastructure, waterways, and tunnels.

steel formwork details
steel section formwork

● How is steel formwork supported?

Steel formwork for concrete is supported in various ways to ensure stability during concrete pouring and curing processes. Here are some commonly used steel ply formwork support methods:

Vertical Support: Adjustable shoring props are commonly used to support horizontal formwork, such as steel formwork for slab or steel waler formwork. These shoring props are placed at specified intervals beneath the formwork to provide vertical support and prevent sagging.

Horizontal Support: Push-pull props or horizontal tie rods are commonly used to support vertical formwork, such as steel wall formwork or steel edge formwork, to enhance the stability of the vertical formwork. They play a role in reinforcing the formwork, preventing lateral displacement, and providing additional rigidity.

Anchoring System: Steel circular column formwork is anchored to the existing structure or foundation using an anchoring system to maintain its stable position during the concrete pouring process. The anchoring system generally comprises essential components, including anchoring bolts and wall ties. These components are firmly fastened to the existing structure or foundation, establishing a secure connection with the steel circular column formwork.

It is important to note that the specific methods of support for steel formwork may vary depending on design requirements, site conditions, and the dimensions of the structure being constructed. Professional engineering guidance and calculations are necessary to determine the suitable support system for each individual project.

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