Concrete is a versatile and inexpensive building material, but builders need formwork to hold its shape as it dries. Formwork can be made of wood or metal and is constructed by formwork carpenters. Permanent formwork made of galvanized steel can add strength to the structure and reduce the need for rebar.
Walking through any neighborhood or city, an observer is likely to notice that most of the structures are made at least in part of concrete. This building material is generally inexpensive, strong, and easy to mold into specific shapes, making it exceptionally versatile. To take advantage of this versatility, however, builders must build concrete formwork that helps the concrete hold its shape as it dries from its liquid form into a solid form. Concrete formwork can consist of wood or metal panels held in place with rods, connecting pins, and other hardware known as dummy.
The suspended ceiling is used to hold the tiles in place, preserving the shape of the concrete as it hardens. Smaller projects, as well as larger ones, will require the use of plywood concrete formwork; a special type of plywood is used because this type of wood will be resistant to water damage and inexpensive enough to use in large quantities. In some cases, the plywood will be reusable, so the carpenters will clean the panels after use. Metallic concrete formwork is often used for larger projects that require precision in terms of flat surfaces, as well as on projects that require support for exceptionally large and heavy quantities of concrete.
Specialty carpenters known as formwork carpenters are likely to be hired by a construction company to properly construct the concrete formwork. These carpenters will read from a blueprint to create a structure that will adequately support the concrete that needs to be poured. Once the formwork is in place, the carpenters are likely to monitor the concrete pouring process and make any necessary adjustments. As the concrete hardens, the formwork carpenter can monitor the concrete to make sure it fits properly. Once the concrete has cured, the carpenter will be responsible for taking the concrete formwork apart, cleaning it, transporting it and storing it properly. In some cases this is unnecessary, as some formwork is permanent and will not be removed after the process is complete.
Permanent formwork is often made of galvanized steel, which is a strong and durable material that is also resistant to water damage. This permanent concrete formwork will help add strength to the concrete structure and in some cases reduce the need for rebar within the concrete. Rebar is a steel bar that is placed inside the concrete structure to increase its tensile strength. While armor will still be needed if a permanent shape is used, less armor is likely to be needed.
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