Calculation of straight stairs on broken strings – Online calculator with the drawings

Calculation of straight stairs on broken strings – Online calculator with the drawings

The most accurate and reliable calculation of straight stairs on polyline kosoura online using a 3D calculator – professional calculation of metal stairs with drawings.

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the Calculator will be available after changes in the relevant parameters.
Click "Calculate" to open the options window.
Choose Drawing:
Distance: 0
Calculation resultsStairs
  • The angle of the stairs: 32.44 °
  • The height of the steps: 17.65 mm
  • The depth of the steps: 27.76 mm
  • Number of steps: 16 pcs.
  • Width of stairs: 100 mm
Materials for constructionStringers
  • The height of the cross section of the pipe: 6 mm
  • The width of the cross section of the pipe: 4 mm
  • The total estimated length of the pipe for making Kosourov: 1813.11 mm
  • The total number of elements for the manufacture of the stringers: 64 pcs.
The jumpers connecting the stringers
  • The height of the cross section of the pipe: 4 mm
  • The width of the cross section of the pipe: 4 mm
  • Length of one jumper: 92 mm
  • Number of jumpers: 16 pcs.
  • The estimated total length for the manufacture of bridges: 1472 mm
Degrees
  • Width: 33.56 mm
  • Length: 100 mm
  • Thickness: 4 mm
  • Quantity: 16 pcs.
  • Volume: 0.215 m3
Risers
  • Width: 13.65 mm
  • Length: 100 mm
  • Thickness: 1.8 mm
  • Quantity: 16 pcs.
  • Volume: 0.039 m3
The fence of stairs
  • The width of the handrail: 8 mm
  • The thickness of the handrail: 4 mm
  • The length of the fence: 542.32 mm
  • Volume: 0.017 m3
Balusters
  • Section side: 5 mm
  • Length: 86.85 mm
  • Quantity: _ pcs.
  • Volume: _ m3
Initial parametersType of stairs
  • Left-side:  selected
Opening
  • The height of the opening: 300 mm
  • The length of the opening: 450 mm
  • Width of stairs: 100 mm
Degrees
  • Total number: 16 pcs.
  • Thickness: 4 mm
  • Step edge protrusion: 4 mm
  • Top step below 2nd floor level: 1 mm
Stringers
  • The height of the cross section of the pipe: 6 mm
  • The width of the cross section of the pipe: 4 mm
The jumpers connecting the stringers
  • The height of the cross section of the pipe: 4 mm
  • The width of the cross section of the pipe: 4 mm
Risers
  • Thickness: 1.8 mm
Floor slab
  • Protrusion over the opening: 100 mm
  • The thickness of the opening: 20 mm
The fence of stairs
  • Handrail height: 90 mm
  • Cross-section side of the balusters: 5 mm
  • The thickness of the handrail: 4 mm
  • The width of the handrail: 8 mm
Wall
  • Thickness: 20 mm
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How to save the calculation results on your computer?
  1. Pick up the necessary parameters for the calculation.
  2. Select the appropriate "Method of preservation".
  3. Select "payment Option" for granting access to:
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    • Subscription Pro allows you to set the drawings of your logo or off are available. Enables access to detailed drawings and calculations, provides the ability to save and download any of the calculations ofunlimited the number of times for the duration of your subscription.
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Help

Straight welded ladder calculator with zigzag bowstring

Stairs on a broken kosour are one of the most common and easy-to-manufacture structures on a metal frame, since they are a simple welded structure in the form of a zigzag made of profile pipes and do not require additional installation of supports (fillies) to fix the steps. Also, all other things being equal, they are the cheapest structures among traditional materials (wood, concrete...), have increased maintainability, are durable, strong and do not contribute to the occurrence of creaks.

The online calculator for calculating a straight metal staircase on polyline slits allows you to create a ready-made design project that contains a comprehensive estimate for manufacturing with optimal material consumption, a set of highly detailed drawings of the main elements, an interactive 3D model to assess the shortcomings of the proposed object and recommendations for assembling the most comfortable structure for operation. All calculations are saved in your personal account and are available for download.

 

Procedure of settlements

  • Step 1. Choose the most acceptable units of measurement – mm, cm, m, inches, feet.
  • Step 2. Select the drawing method: monochrome or color.
  • Step 3. Determining the configuration of the stairs – right-hand (with a left turn), left-hand (with a right turn).
  • Step 4. Sizing ladders – length, width, height of the opening (if the top step at the level of the 2nd floor, the height of the opening = height of the stairs).
  • Step 5. Selection of stages and related variables – number of steps, the thickness of the steps, the protruding edge of the steps, the upper level below level 2 on floor or level (optional).
  • Step 6. Defining the parameters of a polyline skew – the height of the pipe section, the width of the pipe section.
  • Step 7. Installation of additional jumpers between skewers (optional item) – the height of the pipe section, the width of the pipe section.
  • Step 8. Risers (optional item) – the ability to account for the risers of the stairs based on the thickness of the Board.
  • Step 8. Characteristics of the elements of fence – the height of the handrail, the baluster section, the thickness of handrail width of handrail.
  • Step 9. Overlap and walls – must be filled in for correct visualization (does not affect the parameters of the stairs).
  • Step 10. Confirm the entered parameters and start calculating the straight staircase on the polyline after clicking the button "Calculate".

 

Design features / designations in drawings

Drawing straight stair on broken strings
Drawing of a straight staircase

Recommendations

Creating an effective and reliable welded frame staircase is possible only if the calculations are performed correctly – the calculator fields must be filled in in accordance with the actual size of the opening, and the parameters of the main elements are made taking into account the basic rules of ergonomics of the design, which we suggest using. The image below shows the values that were obtained in a practical way based on the formula "convenient stairs" by the French architect Francois Blondel. Other characteristics can be found on the page "Calculation of stairs".

Blondel formula: 2 × h + s = 60/65 cm

  • h – the height of the steps;
  • s – tread width;
  • 60/65 cm – the average length of a person's step.
Size of stair steps

However, our calculator does not take into account compliance with construction regulations and state standards, but at the same time does not allow entering critically unacceptable values. Therefore, in order for the ladder on the zigzag string to turn out not only comfortable and practical, but also safe, you need to familiarize yourself with the provisions of the technical documentation. The most informative are:

GOST 23120-78 "marching stairs, platforms and steel fences", GOST 25772-83 steel fences for stairs, balconies and roofs, SNiP 21-01-97 (SP 112.13330.2011) "Fire safety of buildings and structures", SNiP 31-02-2001 (SP 55.13330.2010) "single-family residential houses", SNiP 2.08.01-89 "Residential buildings", SNiP 2.08.02-89 (SP 118.13330.2011) "Public buildings and structures", SNIP 2.01.07-85 (SP 20.13330.2010) "loads and impacts».

If you still have questions, we recommend reading our review articles – installing stairs and the optimal angle of the stairs. They contain a lot of useful information that will undoubtedly be useful when calculating on a calculator, as well as during the manufacture and installation of the structure.

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Specify dimensions
Display
DU
CL
Type of stairs
LF
RG
Opening
Y
X
Z
Degrees
QS
18
SW
SF
SP
Stringers
STH
STW
The jumpers connecting the stringers
BTH
BTW
BAD
Risers
H
HT
Floor slab
SX
ST
The fence of stairs
RH
BA
RT
RW
Wall
ST