STUDYING THE ELEVATOR DRAWING

The elevator drawings are easy to read.

They will be a little confusing at the first.

But if you once get a hold on it then its fine.

To read the elevator drawing, you must know the parts of an elevator.

I mean the common parts of an elevator.

The elevators have different kinds of drawings.

Both  image show the top view of SHAFT in other words its is also known as SHAFT  PLAN & HOIST WAY.

This drawing shows the main bone positions of elevator guide rails, distance between rails,

Cabin size, shaft size, entrance size, entrance position, running clearance, counter weight position.,

Counter weight size, etc.

The above drawing shows the typical elevator shaft plan.

I hope you know about the below terms already

1. Elevator car

2. Rail

3. Sill

4. Entrance

5. Counter weight

6. Shaft / hoist way

Now you can see the shaft. The inside dimensions of the shaft is the one we need to take care of. Here you can see the shaft depth and width which are the main dimensions from which we will be deriving another measurement.Now the actual purpose of the drawing is to give the exact guidance for shaft/ hoist-way construction and elevator/lift installation. The shaft plan is used to make the template for the lift installation. You can always refer the elevator tree in menu bar for knowing more about shaft plan.

Car DBG - The measurement is the distance between two guide rails that guide the elevator cabin, other vise called elevator car or lift car. This is an important measurement because guide rails should be completely perpendicular and parallel without any twist.

The DBG (DISTANCE BETWEEN GUIDE RAILS) must be exactly the value given in the drawing in all along the elevator shaft.This will determine the quality of the elevator ride in the mechanical manner.

Counter Weight DBG - As in the case of CAR DBG this is the displacement between two guide rails which are guiding the counter rails. As in the case of CAR DBG  this measurement also will affect the quality of the elevator ride.

Landing clearance / Running clearance -

This is the distance between landing sill and car sill. This measurement is universal. it will be always 30mm. Usually this will not be included in the drawing but we have to include this in our calculations. This measurement is so important because this small gap should be maintained all along the lift travel. Passenger safety and door coupling are depending up on it. The huge moving elevator car is moving in this clearance with the stationary lading entrance.

Car rail center line & Entrance center line

In the drawing you can see there is two car rail center line.

1. Horizontal

2. Vertical

Both are important lines.

Entrance center line is also shown in the drawing. The important of this is in some drawing the vertical car center line and the entrance center line (clear opening center line) may not be aligned. There may be an offset between these two. The offset is a very important measurement need to be considered during the installation. In the below drawing you can see the entrance offset explained.