How to Install Formwork for Reserved Openings Above Slab Panels Before starting the installation of formwork for reserved openings above slab panels, it is important to ensure that you have all the necessary tools and materials. This includes formwork panels, scaffoldings, tie rods, nuts, and washers. Additionally, make sure to have a clear plan and design for the openings, as this will guide you throughout the installation process. 1. Mark the Opening Locations: Begin by marking the exact locations of the reserved openings on the slab panels. Use a measuring tape and a marker to accurately mark the dimensions and positions of the openings. This will help you determine the size and shape of the formwork panels required for each opening. 2. Install the Scaffoldings: To ensure a safe working environment, install scaffoldings around the areas where the openings will be installed. These scaffoldings will provide necessary support during the installation process and allow easier access to the work area. Ensure that the scaffoldings are sturdy and securely anchored to the ground or the building structure. 3. Assemble the Formwork Panels: Start by assembling the formwork panels for each reserved opening. Lay them out on a flat surface and connect them using tie rods, nuts, and washers. Make sure to align the panels properly and tighten the nuts securely. The formwork panels should be strong enough to hold the concrete during pouring. 4. Lift the Formwork Panels: Using a crane or other lifting equipment, carefully lift the assembled formwork panels and position them over the marked opening locations. Ensure that the panels are level and properly aligned with the edges of the openings. If necessary, use leveling devices to adjust the position of the formwork panels. 5. Secure the Formwork Panels: Once the formwork panels are in position, secure them to the slab panels using tie rods, nuts, and washers. Insert the tie rods through pre-drilled holes in the formwork panels and tighten them securely using the nuts and washers. This will ensure that the formwork panels are held firmly in place and will not shift during concrete pouring. 6. Reinforce the Formwork: To further strengthen the formwork for reserved openings above slab panels, you can add additional supports such as wooden or steel beams. These supports should be placed across the top of the formwork panels, providing additional stability and preventing any sagging or buckling during the concrete pouring process. 7. Pour the Concrete: Once the formwork is securely in place and reinforced, you can proceed with pouring the concrete into the reserved openings. Ensure that the concrete is poured evenly and fills the entire opening. Use vibration tools to remove any air bubbles and ensure proper compaction of the concrete. 8. Remove the Formwork: After the concrete has cured and hardened sufficiently, you can remove the formwork. Start by loosening the nuts on the tie rods and carefully removing them. Then, gently pry the formwork panels away from the slab panels. Take care not to damage the concrete or the formwork panels during this process. In conclusion, installing formwork for reserved openings above slab panels requires careful planning and execution. By following the steps outlined above, you can ensure a successful installation that provides strong and durable openings for your project. Remember to always prioritize safety and consult with professionals if needed.