What is the formula for calculating the dimensions of the railing of a spiral staircase?

If the platform section is designed, the horizontal projection of the handrail is the distance from the edge of the resting platform e=b 2.

When designing the handrail, the horizontal projection distance from the edge of the resting platform. When it is less than half of the width of the step, that is, B 2, the handrails of the upper and lower stairs should be connected diagonally in the platform section. If the horizontal projection of the handrail of the platform section is designed and the distance from the edge of the rest platform is e=b 2, the handrails of the upper and lower stairs should be connected horizontally in the rest platform section, and the height of the handrail is equal to h.

When the width of the platform is large, when the horizontal projection of the stair handrail of the platform section is e>b 2 from the edge of the rest platform, the platform handrail of the part exceeding b 2 should be horizontally connected, and the height of the handrail is equal to h.

The size of the spiral staircase saves space, if the space is relatively small, generally speaking, the minimum opening of the indoor staircase size can be opened to 1300 * 1300mm, or 1400 * 1100mm, the current spiral staircase is the middle column rotary staircase, it has only one stress point, that is, the center force. This staircase size structure causes the tread board to wobbly up and down if you walk on the outside of the staircase. This is a common disadvantage of all center-column spiral staircases, and the larger the radius of the staircase, the more it will shake.

The load-bearing capacity of spiral staircases is generally 150kg to 200kg, compared to the load-bearing capacity of other finished steel and wood staircases is generally about 400kg.

There are also spiral staircases without central columns, which mainly rely on double spiral beams under the treads to support the load, or the railings of the staircase to support the load. Relatively speaking, the size of the spiral staircase with a central column without a central column is more complex, and the staircase is subjected to the action of a variety of combined forces such as bending, torsion, shearing, and compression, and the force is complex and difficult to calculate. In staircases without columns, the stress of the railing is more complicated, because the railing is generally narrow, and the out-of-plane stability of the beam is not easy to control.

Things to pay attention to when designing the size of the spiral staircase in the home room:

Clause. 1. In order to avoid the illusion of going up and down the stairs, the height of the first step and the last step of the staircase should be the same as that of the other steps. If you need to change, the size of the spiral staircase should be controlled within 4 cm, preferably no more than 2 cm to 3 cm.

Clause. 2. The height of the highest step to the ceiling of the indoor staircase size needs to have a clearance of more than two meters, and the minimum is not less than one meter, otherwise there will be a sense of oppression.

Clause. 3. Railing spacing: The distance between the center of the two railings should be 8 cm, not more than cm, so as not to let children stick their heads out of the gap.

Clause. Fourth, the height of the handrail of the staircase size: to the waist position, 85 90 cm, the diameter of the handrail is better in centimeters.

Clause. 5. Step height and depth: The step height should be 15 18 cm, and the step depth should be 22 27 cm. The number of steps is about 15 steps, and if it is too high, you may need to set up a stair rest platform.

Clause. 6. Safety: The staircase parts should be smooth and rounded, without protruding and sharp parts. For families with children and the elderly, the slope of the stairs should be gentle, and the rotation angle of the indoor staircase size should not be too large; Stair treads should be anti-slip measures, such as anti-slip strips, anti-slip mats, anti-slip grooves, etc.

Clause. 7. Staircase width: when one side is empty, the net width is not less than 75 cm; When there are walls on both sides, the net width shall not be less than 90 cm.

Clause. 8. Staircase style: The size of the spiral staircase should be consistent with the decoration style when designing the staircase.

Clause. 9. Staircase lighting: the light is too dark is not conducive to walking safety, and the light is too bright and prone to glare. Therefore, the staircase light should be soft and clear.

Clause. 10. Staircase noise problem: related to the connection of various parts of the pedal, it can not produce excessive noise when used, so as not to affect the rest of family members.

According to 180 degrees, the height of the finished surface is 160mm, 9 degrees, and 20 steps can be made; However, in terms of space saving, you can reach the second floor at 135 degrees, and the height of the finished surface of the steps is about 214mm, 9 degrees, and 15 steps.

The opening size of the spiral staircase can be as small as 1300x1300mm, or 1400x1100mm.

The current spiral staircase is basically a central column spiral staircase, and it has only one stress point, that is, the center force. To prevent illusions when going up and down stairs, the height of the first step and the last step of the spiral staircase should be the same as the other steps. If you need to adjust, it should be controlled within 4cm, and it is best not to exceed 2 3cm.

The highest step of the spiral staircase is at least two meters away from the ceiling level, and the minimum is m, otherwise it will cause a sense of oppression for users. The distance between the two railings should be kept at 8cm, and the farthest distance should not exceed cm, so as to prevent children from sticking their heads out of the gap.

Summary. Kiss, calculation rule (1) The railing (board) is calculated in square meters according to the horizontal projection length of the center line of the handrail multiplied by the height. The height of the railing is calculated from the bottom surface of the handrail to the upper surface of the stair structure.

2) Handrails (including elbows) are calculated in meters according to the horizontal projection length of the center line of the handrail. (3) The railing of the spiral staircase shall be calculated in square meters according to the horizontal projection length of the centerline of the handrail shown in the figure multiplied by the height. (4) The length of the handrail of the spiral staircase is calculated in meters according to the centerline of the handrail shown in the figure.

5) Barrier-free railings, calculated in meters according to the size shown in the figure. (6) Stair iron railings are calculated in tons. Outdoor fire ladders and steel stairs are calculated in tons.

Kiss, calculation rules (1) railing (board) finch resistance according to the handrail centerline horizontal projection length multiplied by the height in square meters. The height of the balustrade is calculated from the bottom surface of the handrail to the upper surface of the staircase structure. (2) Handrails (including elbows) with age are calculated in meters according to the horizontal projection length of the center line of the handrail.

(3) The railing of the spiral staircase shall be calculated in square meters according to the horizontal projection length of the centerline of the handrail shown in the figure multiplied by the height. (4) The length of the handrail of the spiral staircase is calculated in meters according to the centerline of the handrail shown in the figure. 5) Barrier-free railings, calculated in meters according to the size shown in the figure.

(6) Stair iron railings are calculated in tons. Outdoor fire ladders and steel stairs are calculated in tons.

How to calculate the height of the stair handrailThe height calculation of the stair handrail is actually very simple, as long as the vertical distance from the center of the stair tread to the top of the handrail is measured. Precautions for installation of stair railings Handrails The selection of handrail materials should consider the overall decoration style of the stairs, such as wrought iron stair railings, which can be matched with solid wood handrails; Solid wood railings with solid wood handrails, marble railings with solid wood handrails, etc.; The clearance between the vertical bars of the railing should not be greater than 11cm, and when there are old people and children at home, it is necessary to ensure that the children cannot climb through the middle of the railing; The railing should not be left empty within 10cm from the floor or roof; The railing should be made of strong and durable materials, and can withstand the horizontal load specified in the load code, the height of the railing should not be less, and the height of the railing of high-rise buildings should be appropriately increased, but it should not exceed 1.20m, and the clearance between the vertical railings should not be greater than 11cm in the height of the railing from the ground or the roof. The railing should not be left empty within 10cm from the floor or roof;

What is the formula for calculating the size of a spiral staircase? Hello Length of spiral staircase = x diameter x angle of rotation) 180) When the steps reach the center column, there may be irregular shapes, and the need to file the ballast rock should be taken into account in the calculation. Using the Pythagorean theorem, the horizontal distance between abs is 36*10=360, and the vertical distance between abs is 9*30=270, so the distance between abs = (360 +270 Xingyu)=450 (cm).

According to the formula multiplied by the diameter by the rotation angle of the staircase and then divided by 180, the length of the staircase is calculated, and then the number of steps of the spiral staircase is calculated by dividing the height of the floor by the formula by the tread height; Generally, the tread height of stairs is 170 to 210 mm, and the tread width of stairs is about 280 to 300 mm.