How to design a stair for a exsisting site

It is a challenging thing that the actual site and drawings doesnt match.. so lets see the steps i follow in order to get a stair case right on spot to go to top floor.

first took the measurements of tge opening on the top floor.. length and width. Measured with a measuring tape on site ans drew on picture so that later when i go to office ill know what im doing.

too the slab thickness and floor height from top to top.. so that its easy to find no of steps required. 

Than took a pic from below floor so that i can visualize when i go back to office.

above is the desing whihc came best for the place, did some autocad drawing and this whats it looks like, than next is fabrication time at workshop

by using 100x50mm square hollow section made the main frame and steps with 50x50mm angle pcs.. step is 50mm thick solid wood.

 installed.. looks good   now its time to screw the wood steps and your all set to go uptge stairs.

time to deisng mezaarine to ground level as well

First we took a bench mark of 1m from the out side finishing level.. than marked it on the wall below the mezzanine floor. From that didba scale design.

fabricated it in our workshop.

Designing Automatic door opener without electric

 Above represents the mechanical door that open it self without power from any electric or disel motor... once the car gets on the platform the weight of the car lowers the ramp and which will pull the connection rod down which will make the cross door open.

below is cad drawing which illustrate the design.

white lines show how it will be open when the car go on top of the yellow lines, yellow lines represents the ramp which the car will pass over. the green line shows the tension rod which will pull the pink lines making it white lines. 

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