In steel formwork systems, there exist various form ties that serve to establish a secure bond between the formwork panels and supporting structures.
1. Conventional Form Ties: The most commonly employed form ties are those comprised of a steel rod with cones or washers on both ends. These rods are inserted through the formwork panels and secured using nuts or wedges, resulting in a robust connection.
2. Coil Ties: These ties are constructed from a continuous loop of wire, often galvanized to resist corrosion. They are simple to install and remove, and can accommodate different concrete wall thicknesses by adjusting the loop length.
3. She-Bolts: Alternatively referred to as she-bolts or coil bolts, these form ties consist of a threaded rod embedded in the concrete wall, along with a plate and nut on the external side. They establish a sturdy connection and find common usage in scenarios where frequent formwork removal and repositioning is necessary.
4. Snap Ties: Equipped with a flat plate on one end and a snap-tie wedge on the other, these ties are easily and swiftly installed without any special tools. They offer a dependable connection and are suitable for light to medium-duty applications.
5. Plastic Cone Ties: Designed for use with reusable plastic formwork systems, these ties are made from plastic material. They possess a lightweight nature, are easy to handle, and exhibit excellent resistance to chemical corrosion.
6. Flat Ties: Strip or bar-shaped, flat ties are utilized to connect formwork panels. Typically crafted from steel, they can be readily bent or cut to the desired length. These ties are frequently employed in scenarios where the wall thickness is minimal.
7. Wedge Bolts: Comprising a threaded rod, a wedge-shaped plate, and a nut, these form ties are inserted into a hole in the formwork panel. Tightening the nut secures the connection. Wedge bolts are commonly employed in situations requiring high strength and rapid installation.
These aforementioned examples merely represent a selection of the various form ties adopted within steel formwork systems. The choice of form tie is contingent upon factors such as the application, concrete wall thickness, desired strength, and ease of installation and removal.
There are several different types of form ties used in steel formwork systems, each designed to provide a secure connection between the formwork panels and support structures.
1. Conventional Form Ties: These are the most commonly used form ties, consisting of a steel rod with cones or washers on both ends. The rod is inserted through the formwork panels and secured with nuts or wedges, providing a strong connection.
2. Coil Ties: These ties are made from a continuous loop of wire, often galvanized for corrosion resistance. They are easy to install and remove, and can be used for various concrete wall thicknesses by adjusting the length of the loop.
3. She-Bolts: Also known as she-bolts or coil bolts, these form ties consist of a threaded rod embedded in the concrete wall, with a plate and nut on the external side. They provide a solid connection and are commonly used in applications where the formwork needs to be removed and repositioned frequently.
4. Snap Ties: These ties feature a flat plate on one end and a snap-tie wedge on the other. They are quick and easy to install, requiring no special tools. Snap ties provide a reliable connection and are suitable for light to medium-duty applications.
5. Plastic Cone Ties: As the name suggests, these ties are made of plastic and are used with reusable plastic formwork systems. They are lightweight, easy to handle, and offer good resistance to chemical corrosion.
6. Flat Ties: Flat ties are flat strips or bars used to connect the formwork panels. They are typically made of steel and can be easily bent or cut to the desired length. Flat ties are often used in applications where the wall thickness is minimal.
7. Wedge Bolts: These form ties consist of a threaded rod with a wedge-shaped plate and nut. The wedge is inserted into a hole in the formwork panel, and tightening the nut secures the connection. Wedge bolts are commonly used in applications where high strength and quick installation are required.
These are just a few examples of the different types of form ties used in steel formwork systems. The choice of form tie depends on factors such as the application, concrete wall thickness, required strength, and ease of installation and removal.
There are several types of form ties used in steel formwork systems, including coil ties, flat ties, loop ties, snap ties, and wedge ties. These ties are used to hold the formwork together and maintain the desired shape and alignment during the concrete pouring process.
