VT Presentation by Richard Chin 28-Feb-2011 (Full)

8/6/2019 VT Presentation by Richard Chin 28-Feb-2011 (Full)

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28-FEB-2011 1Eng. Richard Chin, Gulf Elevators & Escalators Co., Ltd.

Exclusive Presentation:

Gulf Elevators & Escalators

By

Eng. Richard Chin


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Understanding the safety rules

forHeadroom Top Clearance

&Pit Room Clearance

for Traction Drive Lift


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Objectives:

1. What are the safety conditions for Headroom

and lift pitbased on Safety Rules EN81-1

2. How to achieve minimum headroom and pit

room?



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Introduction:

1. Who am I?

2. What does GEEC (Gulf Elevators & Escalators Co. Ltd.) provide?

3. FUJI Elevators: 1.75m/s locally produced4. HITACHI Elevators: 2.00m/s fully imported



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JUBAIL

DAMMAN

JEDDAH

ABHA

AL HASA


GEEC Sales and Services Network in K.S.A.


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28-FEB-2011 6

Definition:

What is Headroom?

What is Overhead Height?

What is Pit Room?

What is Pit Depth?

Eng. Richard Chin, Gulf Elevators & Escalators Co., Ltd.


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28-FEB-2011 7

Determining the headroom top clearance

according to safety rules EN81-1

Counterweight rests on its fully compressed buffer.



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Rule No. 1 of 7

There shall be a sufficient space above the car roof to accommodate a rectangular

block with size of not less than 0.50m x 0.60m x 0.80m resting on one of its faces.

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(a)

(b)

(c)



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Rule No. 2 of 7

The Car guide rail lengths shall be able to accommodate a further guide travel of

at least 0.1m + 0.035 v2

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Example:Ifv = 1.0 m/s,

Then the length shall be

0.1 + 0.035 * 1.0 * 1.0

0.135 m


0.035 v2 represents half the gravity

stopping distance corresponding to 115%

of the rated speed:

* (1.15 v)2

2 gn= 0.0337 v2

Rounded to 0.035 v2


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Rule No. 3 of 7

The free vertical distance between the level of the highest clear area on the car

roof and the level of the lowest part of the ceiling at least 1.0m + 0.035 v2

What is Clear Area ?

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Example:

Ifv = 1.0 m/s,

Then the free distance shall be

1.0 + 0.035 * 1.0 * 1.0

1.035 mEng. Richard Chin, Gulf Elevators & Escalators Co., Ltd.

0.35m

0.35m

0.25m

0.48m

0.30m

0.40m

Area 0.12m2


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Rule No. 4(a) of 7The free vertical distance between the

lowest parts of the ceiling and the

highest pieces of equipment fixed on

the roof enclosure 0.3m + 0.035 v2

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Ifv = 1.0m/s, then free distance 0.335m Ifv = 1.0m/s, then free distance 0.135m


Rule No. 4(b) of 7The free vertical distance between the

lowest parts of the ceiling and the

highest part of the guide shoes or

rollers 0.1m + 0.035 v2


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28-FEB-2011 12

Car rests on its fully compressed buffer.

Determining the lift pit clearance according

to safety rules EN81-1



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Rule No. 5 of 7

There shall be a sufficient space in the pit to accommodate a rectangular block not

less than 0.50m x 0.60m x 1.00m resting on one of its faces.

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(a)

(b)

(c)



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Rule No. 6 of 7

The counterweight guide rail lengths shall be able to accommodate a further guide

travel of at least 0.1m + 0.035 v2.

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Example:

Ifv = 1.5 m/s,

Then the free distance shall be

0.1 + 0.035 * 1.5 * 1.5 0.179 m

Ifv = 1.75 m/s,

Then the free distance shall be 0.1 + 0.035 * 1.75 * 1.75

0.207 m



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Rule No. 7(a) of 7The free vertical distance between thebottom of the pit and the lowest parts

of the car, shall be at least 0.50m.

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Rule No. 7(b) of 7This distance may be reduced to aminimum of0.10m within a horizontal

distance of 0.15m between::-

(1) the apron and the adjacent wall;

(2) the lowest parts of the car and

the guide rails.



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28-FEB-2011 Eng. Richard Chin, Gulf Elevators & Escalators Co., Ltd. 16

Design Guidelines:-

Car height

Sling height (upper cross height)

Height below the car

Minimum counterweight height

Maximum counterweight width


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Design Guidelines:-

Traction machine position

Avoid overhead cross beam above the car roof


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28-FEB-2011 18

ElevMate S-Series MRL Elevator


CAB-EM800 CAB-EM810 CAB-EM820 CAB-EM830


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Discussion & Conclusion

Low overhead and pit depth designs lower cost of construction

What are the solutions if the overhead and pit were built not complying with the

requirement?


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THE END

Thank you

VT Presentation by Richard Chin 28-Feb-2011 (Full)

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