Construction of concrete stairs includes steps for example designing, preparing foundation, building formwork, keeping of reinforcement steel bars, concreting, finishing and curing. Construction of concrete stairs is a trial that will need an engineer to review all the aspects and design it as well as a skilled labour to create it.
Steps for Construction of Concrete Stairs
The followings are the steps involved with construction of concrete stairs,
1. Designing of Concrete Stairs
Designing of stairs requires through information about design aspects and site study. The standards that influence the design of stairs are height with the floor, width with the stairs, risers depth, thread width, thickness of the stairs, angle with the stairs, load placed onto the stairs and many other aspects which uses a qualified engineer to style the perfect stairs.
2. Foundation and Support for Concrete Stairs
The inspiration on which the concrete stairs rest is to be properly constructed in order that the plenty of the stairs are transferred directly into ground successfully and resist the movement of stairs.
In the event the plinth beam to build exists at the start of the steps, then a reinforcement steels bars might be linked to them that will transfer the hundreds. If no plinth beam is found, a small concrete foundation or size stone masonry is constructed.
To compliment the steps at the very top which restricts the movement of stairs is generally implemented to the roof beam or slab.
3. Building the Form-work for Concrete Stairs
The most crucial step when building concrete stairs is to use a proper formwork. The angle of flight, size of thread and riser are to be properly checked. Usually while constructing a stairs attached with wall, the fishing line of flight , thread and risers are marked on the wall for proper fixing of shuttering or formwork.
The boards have to be at the very least 2” thick, about secure the weight with the concrete. The entire structure in the form, has to be backed up by 4?4 posts. The wooden boards are employed to build the steps and so are fastened with several screws on the lateral structure with the formwork.
Make use of a spirit level, as to guarantee the form is level and plumb, if you wish to get a neat look. The type of the concrete stairs should be connected to the ceiling.These steel reinforcement bars are placed in the formwork with at least 25 mm spacing and is also tied together.
5. Pouring of Concrete for Concrete Stairs
Pouring of concrete into the formworks is started through the below part to above. The concrete mix plays a vital role in durability and strength of stairs. Standard mix utilized for stairs are 3 parts cement, 2 parts sand, 4 parts gravel and water.
It is recommended to make use of a concrete vibrator while pouring the concrete absolutely fill the gaps of the stairs and also to avoid the honeycomb formation.
4. Steel Reinforcement for Concrete Stairs
The concrete steps should be reinforced with steel bars in order it carries the hundreds coming upon the steps and transfer these phones the floor. The quantity of steel bars and sized the bars will be calculated by the structural engineers based upon the masses starting the steps.
These steel reinforcement bars are placed inside the formwork with the least 25 mm spacing which is tied together.
5. Pouring of Concrete for Concrete Stairs
Pouring of concrete in the formworks commences through the below part to above. The concrete mix plays a huge role in strength and durability of stairs. Standard mix used for stairs are 3 parts cement, 2 parts sand, 4 parts gravel and water.
It is recommended utilize a concrete vibrator while pouring the concrete to completely fill the gaps in the stairs and steer clear of the honeycomb formation.
The project shall be through with great care and patience , because sudden movements can disturb the alignment in the formworks or perhaps collapse the formwork. It is always recommended to pour the concrete ceiling and stairs in the 24 hour, regarding develop a strong bond between these elements.
6. Eliminating Formwork
The stairs requires at least A 3 week period to dry completely, so the elimination of formwork is usually to done only after 21days. Of these A 3 week period proper curing is usually to done to prevents the cracks in stairs as a result of thermal expansion.
As soon as the 21 days, the formwork is removed with a hammer along with a crowbar. Use patience, concerning avoid damaging the concrete or perhaps the edges from the stairs.
7. Finishing of Concrete Stairs
After the formwork is taken off, the steps can be carried out in a number of ways as reported by the requirement of the utilization. It may you need to be finished using trowel or float to provide concrete finish, cement tiles, granite may be installed for much better appearance. Even carpet or wood could also be used to finish the steps.
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