In this project we are aimed at making an automatic stair climbing wheelchair with bed. A concept for a stair climbing wheelchair capable of moving in structured and unstructured environment…Full description
Full description
The project deals with the designing and manufacturing of a tri wheeler stair climber, which can climb stairs with less effort as compared to manual work. The technical issues in designing of this vehicle are the stability and speed of the vehicle wh
Simply supported stair Design a straight flight stair in a residential building supported on reinforced i f d concrete t wallll 1.5 1 5 m )(center )( t to t center) t ) L.L = 3kN/m2 Covering Material = 0.5kN/m The riser are 16cm and goings are 30 cm
Loads and Analysis l 150 7.5cm 20 20 7 .5 7 .5 8 8 16 cos 2
Design for moment M u 1kN .m d 16.5 2 0.6 13.9cm 139mm bw 30cm 300mm assume lim 0.9 0.8525 2 106 1 0.0005 min 1 1 2 420 0.85 0.9 25 300 139 As min 0.0018 * 300 *165 89.1mm 2 0.9cm 2 use 112 for each step
Design for shear VC 0.75
25 139 300 / 1000 26kN Vu 6
Longitudinal – Supported stairs
Longitudinal g d – Supported pp d stairs ((Example) p ) Design a U- stair in a residential building L.L = 3 kN/m2 Covering Material = 2 kN/m2 The riser are 16 cm and goings are 30 cm
Design for moment M u 52.2kN .m d 22 2 0.6 19.4cm 194mm bw 105cm 1050mm assume lim 0.9 2 10 6 52.2 0.8525 0.0036 1 1 2 420 0.85 0.9 251050 194 As min 0.0036 *1050 *194 733.32mm 2 7.33cm 2 use 812
Design for shear VC 0.75
25 194 1050 / 1000 127.3kN Vu 6
Reinforcement Notes
Cantilever Stair
Cantilever stairs (Example) ( p ) Design a cantilever straight flight stair in a residential building L L = 3kN/m2 L.L 3kN/ 2 Covering Material = 0.5kN/m The riser are 16cm and goings are 30 cm