Cleaning formwork: Instructions for calculation and manufacture

Formwork in construction is applied not only for the construction of the foundation, concrete walls or collectors. It is successfully used for reinforced concrete floors of various thicknesses and destination. Monolithic floors have proven themselves well in terms of strength, reliability and efficiency. In cases where it is impossible to install the finished slab overlapping on the capital wall box, the monolithic overlap is made at the place of the bulk method. The overlap for the lower room will be the base of the ceiling, and for the top base of the floor.

To create a solid reinforced monolithic overlap from reinforced concrete, a profile formwork will be required. Before starting work on the construction of floodbing, the calculations of the size and the preparation of materials are made. In the process of preparing the drawings, communication holes for plumbing and heating pipes and power supply trails are taken into account. Arrangement of the formwork of overlaps requires a scrupulous compliance with technology at all stages, from mounting formwork to fill and graze concrete. The final result and qualitative characteristics of the overlaps depend on this.

Tools and materials for arrangement of fire formwork

Formworks for monolithic floors are made collapsible or non-removable. For any of them, a certain set of materials will be required. The amount, dimensions and volumes are determined based on the drawing of the surface overlapped.

1. For the base of the overlap formwork, the waterproof plywood will be required with a thickness of at least 2 cm, professional flooring or OSB sheets with waterproof impregnation.
2. Telescopic support racks with a threaded or pneumatic lifting system. Sometimes conventional car jacks or deaf unregulated backups are used.
3. Metal, wooden or reinforced concrete beams overlap. Their parameters are determined by the area of \u200b\u200boverlapping space. The profile uses the beam formwork overlapping of the 2AVR, a chamberler or other configuration.
4. The reinforcement of concrete overlap is made by steel reinforcement with a diameter of 8 - 10 mm, a knitting wire or a weld is used for fastening.
5. Cement will need high-strength grade 400 or 500, sand, crushed stone and with large amounts of concrete mixer. During work, a conventional set of construction tools will be required: shovel, Kelm, Korchki, turbocurity machine, Waterpas, etc.

Calculation of installation racks for formwork of overlaps

The formwork calculation is made taking into account data on the height of the room and the thickness of the bulk reinforced concrete overlap. The exact dimensions of the placled area will make it possible to properly distribute loads on the plane and distribute the support elements in accordance with the technological requirements.

1. Racks of backups have standard dimensions from 1.7 to 4.5 meters. When setting at the rate of 1, a stand on 1 m.kv. - Loads are evenly distributed, and the required margin of safety is ensured. With 40 cm overlap thickness, the load on the rack will be 1500 - 2000 kg, which meets the technological requirements.
2. The stability of the racks for formworking overlap is provided by tripods, which is equipped with each rack individually. The upper part is equipped with solida, and jacks are provided for sliding telescopic racks.
3. The calculated length of the beams attached through the coordinating is 3.5 of the route for 1 m.kv. Plywood sheets, have a size of 1220x 2440 mm and to determine the required amount, the area of \u200b\u200boverlapping space is divided into plywood area.
4. When arranging monolithic overlap at a level of 4.5 meters, the racks are equipped with binding horizontal rigels. Two types of beelectric connections are a wedge or a cup / lock, provide stability of the structure.

Installation of non-removable formwork of monolithic floors

The optimal option for pouring concrete is the non-removable formwork of overlaps. This design is distinguished by reliable splicing of walls and overlap. The rods of reinforcement and overlap beams lie directly on the capital walls and provide the necessary stiffness of the structure.

1. The capital walls are stacked by plywood or other material, which will serve as the bottom of the formwork and beams. For beams used channel, 2-way, wooden logs or concrete poles and they are tightly tightly to the capital walls with bolts or brackets. The reference racks of the uniforms are installed below. On the perimeter of the capital walls laid out, for example, a side of three bricks will be built in Polkirpich.
2. The space overlaps the longitudinal and transverse reinforcement. At the points of intersection, the reinforcement is grabbed by welding or knitting wire. End of reinforcement should go to the plane of the capital wall and rest in the side. The following layer is then laid out in the Pollipich and is mixed with reinforcement from the reinforcement and so until the calculated thickness of the monolithic overlap is reached.

Concrete is poured at a time and aligns the rocket. Raklya is a fixture similar to Mop. Depending on the weather conditions, the concrete is covered with a film from the rain or moisturized in hot weather for uniform grazing. For the final breakage of the overlap will be required for at least a month.