Step-by-step guide “Installing formwork for floor slabs”
Installing formwork for floor slabs is an important stage in construction that provides shape and support for concrete structures during pouring. Proper installation of formwork guarantees the strength and durability of monolithic or slab floors. This guide will help you step by step correctly install formwork while complying with all necessary building codes and standards. By following these recommendations, you will ensure high-quality work execution and safety on the construction site.
Preparation for formwork installation
Calculation of material quantities. Before starting the installation of formwork, it is important to accurately calculate the required amount of materials. To do this, consider the dimensions of the floor slab (length, width, and height), as well as the type of formwork (wooden or metal). Based on these data, determine the number of boards or metal profiles (profiled metal elements used to form the formwork frame). Also consider possible material losses during cutting or damage.
Tool preparation. Prepare all necessary tools for installing the formwork. These may include hammers (for driving nails), nails or self-tapping screws (for fastening elements), a level (for checking the horizontality and verticality of the formwork), as well as other tools such as a saw for cutting boards or a screwdriver. Make sure all tools are in working condition and suitable for performing formwork installation tasks.
Formwork installation
Installation of support props. Begin by installing support props along the perimeter and in the middle of the floor slab. These props will provide reliable support for the entire formwork structure and prevent its deformation under the weight of concrete. Make sure the props are securely fixed and installed on a level surface to avoid displacement or sagging of the formwork.
Laying horizontal elements. After installing the support props, proceed to laying horizontal beams or boards that will support the shape of the floor slab. These elements must be fixed between the support props, providing the necessary rigidity and shape for the future slab. It is important that the horizontal elements are leveled so that the slab has the correct shape and does not develop defects.
Checking and reinforcing the formwork
Checking horizontality. Use a level to check the horizontality (horizontal position relative to the ground) of the horizontal formwork elements. This is necessary to prevent misalignment during concrete pouring. When placing concrete, it is important that the formwork remains stable and does not change shape. In Italy, for example, according to building standards such as UNI EN 13670, such checks are mandatory to ensure the safety and durability of structures.
Reinforcing the formwork. To prevent deformation of the formwork under the weight of concrete, secure it with additional braces (metal or wooden elements that increase structural rigidity). This is important to ensure that the formwork does not bend or collapse during pouring. It is essential to comply with building regulations such as the Italian standard UNI 10816, which governs structural strength and formwork stability to avoid risks on the construction site.
Proper installation and reinforcement of formwork is a key stage for the successful creation of monolithic or slab floors. By following this guide, you will ensure structural reliability and prevent possible deformations during concrete pouring. Make sure that all stages are carried out in accordance with building codes and standards to guarantee the safety and durability of your project.
Instructions for using the guide “Installing formwork for floor slabs”
- Preparation: Calculate the required formwork materials and prepare all tools such as hammers, nails, screws, and a level.
- Formwork installation: Install support props along the perimeter and in the center of the slab for reliable support. Then lay horizontal beams or boards to form the formwork.
- Checking and reinforcement: Check the horizontality of the formwork elements using a level. Secure the formwork with additional braces to strengthen the structure.
By following this checklist, you will be able to install formwork correctly and safely, ensuring the strength and stability of the floor slab.
