Ladder double frame: monolith design with their own hands

Step by step construction of a reinforced concrete staircase mirror - personal experience

There are lots of varieties of monolithic concrete stairs - just one march, a turntable, a zabezhnymi steps and even helical. But, regardless of the form, all of these ladders usually with a smooth bottom, while there is an interesting variant of execution - a double frame. These stairs are called mirror as stage they are projected on the bottom. This species occurs much less frequently than with a smooth bottom, but our craftsmen have mastered the production thereof. Their experience they share with those who are also interested in this original design.

Content

• Scheme mirror staircase
• Installing formwork under the staircase mirror
• Reinforcement mirrored staircase
• stairs concreting
• finishing stairs

Scheme mirror staircase

Andrej23

I want to share with the forum users their experience independent manufacturing monolithic stairs, where the bottom repeats the top, otherwise referred to as a double frame or mirror. Opening a ladder was small - the depth of 224 cm and a width of 197 cm, a height of the second floor to floors 315 cm. After viewing the pictures, and shoveling Forum, it was decided to do a double ladder frame, as the most suitable for design space.

Based on the input stages on graph paper drafted scheme, it - stair project.

Installing formwork

The embodiment of ideas began with the layout of the walls and the support device niches in the walls, and established a central support for the shuttering.

Formwork monolithic slabs remained plywood 20 mm thick, and it was used. After assembly, the inside shape coated with a thin layer working out to the shuttering could involve repeatedly. As craftsman notes for ladders of this kind could take the plywood and thinner, 18 or 16 mm, but 14 mm it is not advised.

ladder reinforcement

For this type of structural reinforcement of a mesh reinforcement diameter of 12 mm is not enough, we stopped on a double frame - lower reinforcement rod 10 mm in diameter, with repetition of steps profile, as already upper - just mesh twelfth fittings. Furthermore, through step in holes in the wall (70 × 100 mm) was brought transverse reinforcement upper mesh and the transverse rods are brought into abutment niche.

There is another scheme of reinforcement mirror ladders used when there is no possibility to use the wall as a support.

Reinforcement for Stroke stages Andrej23 He bent homemade device.

On top of the reinforcement cage mounted cross from the same plywood, made from scraps of reinforcement - lining in the middle screws, nedohodyaschie to the edge. A safety net, so that during vibration level is not squeezed. As mounting crossbars using metal corner on the press washer. The last stage of the spacer installed in the middle stages - without steps can happen with a curved profile.

Before the casting craftsman made secure again and strengthened the shuttering metal stands.

stairs concreting

Half a cube of concrete M350 ordered the factory, after pouring every three steps carefully vibrated concrete virtually squeezed out, due to its high density. On the whole casting it took about two and a half hours, by which time the lower level have already begun to set.

When filming the formwork, signed every detail to expedite reassembly by pouring the second ladder. It is identical to the first, only the rise in the clockwise direction. Even without finishing staircase looks interesting.

Andrej23

Step height 17.5 cm, "body plate" and 17.5 cm. It turns out that as the upper stage would lie on the bottom, and the ladder includes various configuration blocks height of 17.5 cm.

finishing stairs

Such ladders often plaster or wood veneer, but in this case the preferred ready stage with risers of Spanish granite with dimensions of 120 × 30 cm. Steps are cut at the desired size, modular stairs had to instruct the scraps, but thanks to the fine seam and grouting in a color that is almost imperceptible.

These ladders are doing and our other craftsmen, for example - the participant with the nickname of the portal Pozitivnyi.

Or Ax.

Mirror staircase will fit in every interior, but forum users professionally engaged in the manufacture of monolithic stairs, pointed out that the demand for them in recent years only grows. Perhaps it is this structure will be a highlight of your design.

About monolithic stairs of this and other types - the relevant section in the forumHow to save a solution for concreting - article about the rounded porch. An illustrative example of the original wooden staircase - video a house with a second light.

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