A detailed technical drawing of a staircase with 4 steps, a starting platform, and two side ramps, created using a step-by-step operational procedure.
Extract
[...] 2-Realize on A3H format with pencil and instruments the technical drawing of this staircase: Scale 1:10. We will execute: The front view following the corresponding left view, the corresponding top view. (We will represent all hidden edges) 1-Operational procedure for the realization of the staircase drawing (sketches with perspective at each stage) We have two representations of the staircase. A first representation in isometric perspective and another in the form of a cutaway view that clearly shows that there is a structural void under the steps themselves. [...]
[...] -Length of the base of the ramp: 1200 mm (corresponding to the length of the ascending part of the steps). -Height of the upper horizontal part of the ramp: 70 mm. -Depth of the front chamfered part of the base: 150 mm. -Height of the front chamfered part of the top: 250 mm. 2-Draw on A3H format with pencil and instruments the technical drawing of this staircase: Scale 1:10. We will execute: The front view following the corresponding left view, the corresponding top view. [...]
[...] Without this void, I would have started by drawing the first platform. -Dimensioning of the rectangular parallelepiped : Length (depth) : 1200 mm; this is the total length of the rectangular parallelepiped at the base. Width : 1200 mm; this is the total width of the rectangular parallelepiped Height : 680 mm; this is the height of the rectangular parallelepiped Step marking the tread profile on the width On the width of the rectangular parallelepiped, I mark the steps of the staircase by creating a regular grid consisting of small rectangles with dimensions 300 and 170. [...]
