- Type of stairs and formwork
- calculation ladders
- formwork assembly
During the construction of suburban homes often can not do without the construction of concrete stairs.No matter where it is located: in the home, in the basement or in the entrance to the house, you will need some knowledge - how to make the formwork for stairs.
Type of stairs and formwork
concrete spiral staircase
ladder - a very complex construction building, which has to be comfortable, beautifully trimmed, durable and reliable, and most importantly - absolutely safe.For all of these parameters, preferred concrete stairs.Her magnificent performance, aesthetic appearance.Concrete stairs easily decorated different facing materials.
Despite all this, it can make any handyman.The main thing to make all the calculations and know how to make the formwork for stairs.
complexity and the complexity of the construction of the formwork stairs depends on the shape and its type.
staircase, located between two walls, which is very lightweight construction - not to do the side formwork.The walls themselves perform the function of the carrier.They are fixed elements of the frame.
Nice and easy going formwork odnomarshevoy stairs.It is only necessary to mount one end formwork as well as stair supports.
Manufacturing stair formwork
more complicated formwork will require the construction of a staircase with several flights and landings in between.For additional details will need different elements of formwork, columns and supports.
Spiral concrete staircase is the most complex formwork.It is very difficult to manufacture, time consuming and require significant monetary investments.The formwork consists of many parts of curved shape, a plurality of supports.
Calculation of concrete staircase
when calculating the main staircase - is the angle of the climb.The most common is between 25 and 45 degrees.Stairs rise from an acute angle requires less concrete, but difficult for older people to use.
main slopes stairs
The second step is to calculate the width and height of the steps.
Do not forget about all the building regulations that must be adhered to when calculating the product of the stairs.
Building stair formwork
From the right of assembly and strength of the formwork - depends on the reliability and longevity and beauty for future concrete staircase.
Cutting board and waterproof plywood are the main elements of the formwork.
lower part of the stair formwork
It is made for the entire ladder, or separately for each stage.It depends on where in the future will be located staircase and what form it is.
To mount the formwork required:
- edged board (30 mm), plywood, water-resistant (20 mm);
- timber building (100x100).
Side formwork elements stairs
basic details of formwork:
- beam segments that connect the shuttering parts together.
- boards for the connection of elements forming stage, which serves as a barrier stretching sheets during concreting.
- Formwork end.It is made of plywood and to layout production.
going formwork using screws.Typically, professional masters use phosphated screws.They are black with a partially threaded.Use the nails are not recommended, they then pull hard when removing the formwork.To facilitate the connections between the components using metal corners and short bars.
Making forms for concrete staircase
To work on the assembly of the formwork will need the following tools:
- Plumb and level.
- hacksaw or jigsaw.
- Screwdrivers or screwdriver.
In establishing the backups should take into account a lot of weight concrete.Racks assembled formwork prior to pouring the concrete must stand on the ground or the floor, rather than suspended in the air.To avoid this you can put them under the lining, or to drive a wedge.The entire structure is bound together with boards - it increases its rigidity.
last phase of assembly formwork - reinforcement.This will give the strength and stiffness of the whole structure.Typically use a ribbed rebar with a wire diameter of 10 to 12 mm.The elements are connected to each other fittings soft wire.
Filling formwork concrete
Concreting of stairs is produced at a time.It starts pouring from the lower levels.In the concrete rubble is added, so it does not flow out of the formwork.Necessarily it is necessary to use an electric vibrator.This will seal the concrete and will prevent the formation of air pockets.After drying, the formwork dismantled and staircase railings are decorated with various decorative materials.
Good knowledge of the issue - how to make the formwork for stairs, allow you to quickly and easily do the job.