Staircase Load Calculation

A fraction to decimal conversion table for common fractions used in measurements is also provided at the bottom of the page. The imposed load is 2 5 kn m2and finishes is 0 5 n m2. Estimation of stairway treads depends on the height between storeys and height of treads.

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For stairs serving multiple floors multiply the occupant load of the floor that serves the most people by 0 3.

Staircase load calculation. L 0 15 1 2 3 21 1 2 0 15 2x9x0 010 2 0 025. Iii top bars 10mm dia in middle and first floor landing. The optimal rise is from 30 to 40. Calculate the number of steps that will be needed considering an ideal riser of 18 cm the height of the space is divided by the.

Depth of a tread 2 heights of a tread 63 3 cm. The optimal height of treads is 20 25 cm. Refer to the figure adjacent to the calculator as a reference. The treads depth should be not less than 28 30 cm.

The dead load includes own weight of the step own weight of the waist slab and surface finishes on the steps and on the soffit. These calculations give you the required combined width of all exit stairs serving that floor. However the minimum clear width between handrails is 44. While planning any stair important dimension to find out first that is rise and tread of stair and their numbers.

For stairs serving one floor multiply the floor s occupant load by 0 3. Live load in staircase 3 kn m2 loading on spans l1 and or l3 per metre run landing portion. Sample calculation of a staircase that should be 2 60 meters high 1. The formula defining the level of convenience is as follows.

Factored wl1 wl3 1 5 dead load live load 11 67 kn m loading on span l2 per metre run flight portion. Live load is taken as building design live load plus 150 kg m2 with a maximum value of 500 kg m2. Design the staircase by using concrete grade 25 and strength of reinforcement of 500 n mm2. Waist t of 7 5 cm is reasonable for this type of stair.

Before finding out rise and thread fix following points total clear distance between two floor a 10 6 3 20m total width of one flight or distance between the first riser to last riser b 1 80m. The stair calculator is an online tool for calculating various parameters involved in the construction of stairs.