We still see projects where the architect freezes the shaft from a brochure table, then asks the factory to “make it fit.” That almost never ends well. Good elevator shaft design starts with load, speed, door type, and whether you are running MRL or a conventional machine room — then the numbers follow.

For most commercial passenger cars, the conversation around elevator shaft dimensions is really three conversations: clear width/depth (including plumb tolerance), elevator pit depth for buffers and inspection space, and elevator overhead clearance for the selected drive. Change the door from center-opening 800 mm to a wider hospital opening, and the shaft envelope moves. Change from geared machine-room to gearless MRL, and overhead becomes the tight constraint.

On export jobs we ask for a simple freeze list before rebar: rated load and speed, number of stops, door clear opening, power supply, and any fire or seismic extras. With that, RITECH issues a GA drawing the structural engineer can actually use — reaction loads included, not just a pretty cabin render.

Common overseas traps: copying a China domestic shaft chart into a market with different buffer rules; forgetting bracket space for seismic rails; shrinking the pit after the freight sill was already approved. If the shaft is already cast, say so early. Sometimes we can still help with a different model; sometimes the honest answer is a civil modification.

If you are mid-design in Suzhou or abroad, send the preliminary section to SUZHOU RITECH ELEVATOR CO., LTD. We would rather argue about 50 mm of pit now than about a delayed façade later.