Types of valves;which valves are best suited for the foundation

Dear readers Stroy-shkola.ru, Good day.In this article we will examine what kind of reinforcement used for the foundation, as well as find out what kinds of valves and fittings are best suited for different types of foundation and concrete.

What rebar used for the foundation

Concrete is fairly old invention and its variants were used in the ancient world.However, casting concrete, despite the good performance of the compressive stress resistance has insufficient resistance to acceptable values ​​at loads in other directions.

Meanwhile, concrete structures, particularly concrete casting, the underlying foundation of different structures may be exposed in other areas.On the tape a concrete foundation, on a concrete foundation in the form of a monolithic slab on precast pile or bored pile affects not only the structure of the weight, but also the efforts of the soil, changes in volume due to seasonal changes.In most parts of the country the ground freezes in winter and the moisture contained in it expands the volume of the soil.The expansion takes place in all directions, and the foundation base may be subjected to horizontal loads.Also, the soil on your construction site may consist of several layers of different densities, which can be moved relative to each other.

To improve the strength of concrete castings in all areas of power frame is embedded in the body of the concrete casting, which becomes a kind of "skeleton" of your foundation.As the "bones" of the "skeleton" used metal fittings.

Reinforcement foundation

reinforcement types for foundations

1. Metal fittings to create a power skeleton of concrete foundations is made of steel bars.The most common are metal rods having a circular shape in cross section.To improve the strength characteristics of the surface of the metal rod is provided with a ribbed spiral surface.
2. In addition, the recent reinforcement for concrete castings can be made of durable fiberglass.Manufacturers indicate that FRP reinforcement may be greater than the density of metal rods.
   

   Fiberglass fittings - photo

main characteristic is its reinforcement section or diameter.Construction industry produces metal fittings with a diameter from 5 to 32 millimeters.Thus, when designing a metal frame, you can choose the steel bars with a cross section that provides the necessary strength of the assembly.

With individual construction, to create the foundation bases commonly used valves and sectional diameter of 8 to 16 millimeters.

For each type of bases: the belt, in the form of a monolithic slab or bored pile diameter of the valve is adjusted individually.

Further, metal fittings, regardless of its cross-section can be divided into two basic types:

• C ribbed surface.This reinforcement should be used in areas that will receive the tensile load.The ribbed surface of the reinforcing rod shows a higher degree of engagement with the cured concrete solution as it enters a larger surface for contact.

• Rods with a smooth surface.Such valves generally used as the connecting webs.Thus it should not be heavily loaded, and the smooth metal fittings can connect the longitudinal lines of force are made of ribbed metal reinforcement.

How to connect the valve to

foundation in the construction industry, metal reinforcement bars are usually joined into a single frame by spot welding electric.This makes it possible to fix the intersection of the rods at high speed.However, this method has its limitations:

• Firstly, you can not connect welding all types of metal fittings, and the only one that has in its labeling beech "C" - "welding".
• Furthermore, welding of metal reinforcement bars is rigid fixing means, but should frame structure at the intersections of the bars must have a small degree of freedom.Meanwhile welding rods fix without backlash.
• Another disadvantages is the loss of reinforcement welding strength properties of the metal bar at the weld.

also a popular way of joining metal reinforcement rods at the point of intersection in the frame is mated.It is carried out using binding wire, from which formed and twisted loops in each the intersection of the metal frame bars.

fresh way of fixing the intersection of metal bars is the use of plastic building clamps.This is a very fast way of fixing, and relatively cheap.

mating fittings - photo

When connecting rods frame in the corners of the foundation they need to connect overlapping with bending the rods, without a simple crossing.Read the article - how to tie rebar for the foundation.

Use reinforcement in the construction of strip foundation

When you create a monolithic concrete foundation bases recommended to create at least two horizontal reinforcing levels.In this case, none of the reinforcing belt should not touch the surface of the formwork, and accordingly the surface of the concrete casting of the future.

for strip foundation in the individual dispensation recommended to use rods with a diameter of 10 to 14 millimeters .The higher the weight of your future building - the greater the cross-section used in the foundation reinforcement.

in each of the horizontal reinforcing belts strip foundation must be at least two longitudinal lines of force, made up of ribbed rebar.Between a longitudinal and horizontal line layers are connected respectively horizontal and vertical force webs, which can be used for less expensive and less smooth fitting in cross section.

to frame strip foundation under the private home pitch between the connecting bridges may be about 50 centimeters.

Fittings for strip foundation

On all sides the power strip foundation frame must be surrounded by concrete.Barrier layer should be at least 5 centimeters.But do not bury and strong horizontal belt force in the concrete casting - he plays the role of metal beams and concrete casting protects against damage during its bending.

At the bottom of the concrete ribbon away from the power zone to the outer edge of the casting can be 3 centimeters.

Create a reinforcing frame in the bored piles for reinforcement

bored piles used a metal rod with a ribbed cross-section of about a centimeter.For reinforcement of the pile can be used from 2 to 4 or more vertical lines of force.The final amount of vertical rods in the casting depends on the diameter of the piles of the future.

scheme reinforcement bored piles

diameter bored piles regulated formwork.It can be used as a pipe sections of virtually any material.So when used as shuttering asbestos-cement pipes with a diameter of 20 centimeters, you can use 4 cm rod section.

also as tape concrete foundation metal rebars must be completely covered with concrete solutions and not to touch the walls of the formwork.

Armiruem concrete foundation in the form of a monolithic plate

create a monolithic concrete foundation in the form of a plate is one of the most expensive, but at the same time one of the most reliable solutions.In this case, such a foundation will be used and a large number of valves.

Armiruem concrete foundation in the form of a monolithic plate

For this foundation using fittings with a cross section of 10 to 16 millimeters.When viewed from above the two horizontal reinforcing belt power cells should form with the dimensions of 20 by 20 centimeters.