In any multi-storey building, floor slabs cannot be dispensed with. Most of them are reinforced, since such products have increased strength. Although in exactly the same way today blocks are made for stairs, as well as door and window jumpers. So how is reinforcing a monolithic slab ?
First of all, you have to correctly calculate all the indicators for such an operation. Firstly, it is strongly recommended to use only reinforcing elements of class A3 for this purpose. Their diameter varies between 8-14 mm and depends on the design load on the structure.
As a rule, reinforcement of a monolithic floor slab is made in two layers. Simply put, the reinforcement is located at the top and bottom of the plate. Note that the concrete layer on top of the reinforcement metal must be at least 20 mm. If there are no ready-made nets, the elements are connected using a special knitting wire.
Attention!
The use of welding is not permitted for this purpose!
All elements must be superimposed in a continuous layer, overlap connection is not allowed. Only in case of shortage of length can it be increased with the help of connecting rods, but at the same time their diameter should be 40 times greater than that for the reinforcement you use. So, if a grid with a rod diameter of 10 mm was used in the plate, then the connecting unit should be at least 400 mm. Note that the reinforcement of a monolithic floor slab must be carried out so that the joints are staggered. The upper and lower layers must be strengthened by applying a U-shaped connection.
You should be aware that the calculation of a monolithic floor slab should imply a uniform distribution of loads in its thickness. That is, the lower layer, which undergoes continuous tensile action, receives the main load. The reinforcing base will be compressed from above. In general terms, when making calculations, you should always keep in mind the insertion of amplifying elements at especially problematic points, but there are still general patterns.
So, the reinforcement scheme of a monolithic plate in the lower middle part necessarily provides for the laying of additional rods. Be sure to strengthen the plates lying in the joints of the ceilings and load-bearing walls. Of course, in places of holes or other positions subject to additional load, there should be similar inserts. For example, those must be provided for in door and window openings.
In places above the load-bearing walls, on the contrary, the upper mesh is reinforced. If you intend to use columns, then in this case you can not do without the use of complex architectural programs for calculations, since such situations are not included in the standard ones.
It is important to note that concrete pouring must be carried out using a concrete pump. It is very important to use vibration seals. Do not forget that in order to avoid cracking of concrete on the surface of the slab, it must be periodically moistened with water for two to three days after pouring.
Thus, the reinforcement of a monolithic floor slab is carried out in strict accordance with building codes and standards.