lift & fire safety case study -of a 10 yr old elevator- ahmedabad-cept university

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SUBMITTED BY:

RAHUL N.SOMPURA (

ARTH

SCHOOL OF BUILDING SCIENCE &TECHNOLOGY,

CEPT UNIVERSITY

SUBMITTED BY:

N.SOMPURA (2905)

ARTH J.VIN (3105)

SCHOOL OF BUILDING SCIENCE &TECHNOLOGY,

CEPT UNIVERSITY

RAHUL N.SOMPURA (2905) ARTH J.VIN (3105)

2 LIFT & FIRE SAFETY: CASE STUDY: OLD PASSENGER LIFT

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TABLE OF CONTENTS

INTRODUCTION ..................................................................................................................... 3

TECHNICAL DETAILS ............................................................................................................... 4

QUANTITY OF SERVICE: ...................................................................................................... 4

QUALITY OF LIFT .................................................................................................................. 12

QUALITY OF SERVICE ........................................................................................................ 12

INSIDE THE CAR ............................................................................................................... 12

OUTSIDE HOISTWAY ........................................................................................................ 13

MACHINE ROOM ............................................................................................................. 14

TOP OF CAR ..................................................................................................................... 15

PIT ................................................................................................................................... 18

FREQUENTLY ASKED QUESTIONS ......................................................................................... 21

CONCLUSION ....................................................................................................................... 22



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INTRODUCTION

NAME OF THE SITE SHAKAMBA TOWERS,GURUKUL,MEMNAGAR

DATE OF LIFT INSTALLATION 14/03/1992

TYPE OF LIFT PASSENGER LIFT

NO.OF LIFT PER TOWER 1

SPEED: 0.8 m/s

LIFT CAPACITY 272 KG(4 PASSENGERS)

CONTROL TWO SPEED AC

POWER: 3 PHASE POWER SUPPLY

TRAVEL 30 meters

TOTAL FLOORS 10 FLOORS

MACHINE ROOM LOCATION AT TERRACE

OPERATION TYPE MANUAL OPERATION

HOIST WAY 1300x1400 mm PER LIFT,2 HOISTWAY SEPARATED BY

ISMB500

CAR INSIDE 900x900 mm

LIFT WELL 1400x1500 mm

ENTRANCE 700 mm

CLEAR OPENING FOR DOOR

FRAME 1175 mm

DOOR FRAME HEIGHT 2350 mm

CAR ENTRANCE DOOR TYPE COLLAPSIBLE STEEL DOORS

COUNTERWEIGHT POSITION BEHIND THE CAR MADE OF WROUGHT IRON BLOCKS

SUSPENSION ROPE 3-16 mm ø ,3-10 mm ø & 2-8 mm ø ROPES USED

OVERSPEED GOVERNER TRIPPING SPEED :1.2 m/s, ROPE DIA-8mm

SIGNALS INSIDE CAR Up Indication

Down Indication

Digital car position

Push button for each floor (BECALITE)

Auto/Attendant key switch.

Car ventilation

Car light

Alarm Switch

Stop Switch

Switches for up and down run of car

ON TOP OF CAR Up push button

Down push button

IN THE MACHINE ROOM Up push button

Down push button

Inspection switch

ON EACH LANDING Up Indication

Down indication

Digital car position

RAHUL N.SOMPURA (2905)

TECHNICAL DETAILS

QUANTITY OF SERVICE:

HANDLING CAPACITY OF LIFT (FROM MORNING 6:00 AM TO NIGHT 9:00 PM)

TIME 6:00 6:05 6:10

ARRIVAL 2 2 3

TIME 7:00 7:05 7:10

ARRIVAL 8 9 9

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HANDLING CAPACITY 7:00

2905) ARTH

LIFT & FIRE SAFETY: CASE STUDY: OLD PASSENGER LIFT

FROM MORNING 6:00 AM TO NIGHT 9:00 PM)

6:15 6:20 6:25 6:30 6:35 6:40 6:45 6:50

3 4 4 5 5 6 6 7

7:15 7:20 7:25 7:30 7:35 7:40 7:45 7:50

10 10 11 11 13 14 11 10

6:00 6:05 6:10 6:15 6:20 6:25 6:30 6:35 6:40 6:45 6:50

1 HOUR HANDLING CAPACITY

HANDLING CAPACITY 6:00-7:00

7:10 7:15 7:20 7:25 7:30 7:35 7:40 7:45 7:50 7:55 8:00



ARTH J.VIN (3105)

4 STUDY: OLD PASSENGER LIFT

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6:50 6:55 7:00

7 8 8

7:50 7:55 8:00

10 9 9

6:55 7:00

8:00


TIME 8:00 8:05 8:10

ARRIVAL 9 10 11

TIME 9:00 9:05 9:10

ARRIVAL 9 8 7

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0123456789

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2905) ARTH


8:15 8:20 8:25 8:30 8:35 8:40 8:45 8:50

12 13 14 16 16 17 14 11

9:15 9:20 9:25 9:30 9:35 9:40 9:45 9:50

6 6 6 5 6 5 7 6

8:10 8:15 8:20 8:25 8:30 8:35 8:40 8:45 8:50 8:55 9:00





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8:50 8:55 9:00

11 10 9

9:50 9:55 10:00

6 6 8

9:00


TIME 10:00 10:05 10:10

ARRIVAL 8 7 6

TIME 11:00 11:05 11:10

ARRIVAL 11 13 14

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10:15 10:20 10:25 10:30 10:35 10:40 10:45 10:50

5 6 7 8 10 11 12 11

11:15 11:20 11:25 11:30 11:35 11:40 11:45 11:50

15 16 15 14 13 12 12 11





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10:50 10:55 11:00

11 10 11

1:50 11:55 12:00

11 11 11


TIME 12:00 12:05 12:10

ARRIVAL 11 12 12

TIME 13:00 13:05 13:10

ARRIVAL 6 5 4

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2905) ARTH


12:15 12:20 12:25 12:30 12:35 12:40 12:45 12:50

11 10 9 9 8 7 7 6

13:15 13:20 13:25 13:30 13:35 13:40 13:45 13:50

5 5 4 6 6 7 6 5





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12:50 12:55 13:00

6 7 6

13:50 13:55 14:00

5 5 4


TIME 14:00 14:05 14:10

ARRIVAL 4 4 4

TIME 15:00 15:05 15:10

ARRIVAL 4 4 4

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14:15 14:20 14:25 14:30 14:35 14:40 14:45 14:50

5 5 4 4 4 4 4 4

15:15 15:20 15:25 15:30 15:35 15:40 15:45 15:50

4 4 3 3 3 4 4 4





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14:50 14:55 15:00

4 4 4

15:50 15:55 16:00

4 5 5


TIME 16:00 16:05 16:10

ARRIVAL 5 5 6

TIME 17:00 17:05 17:10

ARRIVAL 6 6 7

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16:15 16:20 16:25 16:30 16:35 16:40 16:45 16:50

6 6 6 6 6 5 5 5

17:15 17:20 17:25 17:30 17:35 17:40 17:45 17:50

7 7 7 7 7 7 8 8





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16:50 16:55 17:00

5 5 6

17:50 17:55 18:00

8 8 8


TIME 18:00 18:05 18:10

ARRIVAL 8 9 9

TIME 19:00 19:05 19:10

ARRIVAL 13 14 15

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18:15 18:20 18:25 18:30 18:35 18:40 18:45 18:50

10 10 10 11 11 12 12 13

19:15 19:20 19:25 19:30 19:35 19:40 19:45 19:50

15 14 13 12 11 10 10 10





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18:50 18:55 19:00

13 13 13

19:50 19:55 20:00

10 11 10


TIME 20:00 20:05 20:10

ARRIVAL 10 9 8

• HENCE FROM THE STUDY THE PEAK PERIOD IS IN THE MORNING TIME FROM 8:30 TO

8:50 AM

• THE MAXIMUM POPULATION HANDLED DURING PEAK PERIOD=17

• HENCE HANDLING CAPACITY (H) OF THE LIFT IS CALCULATED BY THE FOLLOWING

FORMULA

•

• Q=80% OF MAX CAR CAPACITY =

• T=WAITING INTERVAL IN SECONDS=

FROM GROUND FLOOR TO TOP FLOOR)

• P=TOTAL POPULATION TO BE HANDLED DURING PEAK PERIOD=

• THEREFORE H=300x3x100/(

= 90000/6075

= 14.81 %

• HENCE THE HANDLING CAPACITY OF THE LIFT IS QUITE SUFFICIENT AS COMPARED

TO THE PRESCRIBED HANDLING CAPACITY OF 5%

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20:15 20:20 20:25 20:30 20:35 20:40 20:45 20:50

8 7 8 7 8 8 7 7

HENCE FROM THE STUDY THE PEAK PERIOD IS IN THE MORNING TIME FROM 8:30 TO

THE MAXIMUM POPULATION HANDLED DURING PEAK PERIOD=17

HENCE HANDLING CAPACITY (H) OF THE LIFT IS CALCULATED BY THE FOLLOWING

80% OF MAX CAR CAPACITY =AVERAGE NO. OF PASSENGERS CARRIED BY CAR =

T=WAITING INTERVAL IN SECONDS= 37.5 seconds(CONSIDERING LIFT MOVING

FROM GROUND FLOOR TO TOP FLOOR)

P=TOTAL POPULATION TO BE HANDLED DURING PEAK PERIOD=162

300x3x100/(37.5x162)

6075

HENCE THE HANDLING CAPACITY OF THE LIFT IS QUITE SUFFICIENT AS COMPARED

TO THE PRESCRIBED HANDLING CAPACITY OF 5%



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20:50 20:55 21:00

7 7 7

HENCE FROM THE STUDY THE PEAK PERIOD IS IN THE MORNING TIME FROM 8:30 TO

HENCE HANDLING CAPACITY (H) OF THE LIFT IS CALCULATED BY THE FOLLOWING

CARRIED BY CAR = 3

(CONSIDERING LIFT MOVING

HENCE THE HANDLING CAPACITY OF THE LIFT IS QUITE SUFFICIENT AS COMPARED



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QUALITY OF LIFT

QUALITY OF SERVICE

• The average waiting interval of the lift is 37.5 seconds hence it is satisfactory

• The quality of the lifts is sufficient enough with regular monthly maintenance

provided for which each resident has to pay Rs.400 extra for lift maintenance. The

maintenance procedure for these lifts is provided as follows:

INSIDE THE CAR

1.1 CAR INTERIOR

Examine the car interior for damage including ceiling, handrails, door panels, door astragals,

lighting, and floor. Tighten all fasteners in the car panel and replace as needed. Check

operation of ventilation fan and clean as needed.

1.2 CAR CONTROLS & PANEL

Examine the car control panels and position indicators for condition and operation of all

lamps. Replace all burned out lamps. Check operation of key operated stop switch with the

car stopped near/at the top terminal. Use key to check operation on independent service.

1.3 LEVELING, STOPPING, ACCELERATION AND DECELERATION

Operate to each floor in both directions and observe the leveling accuracy, Stopping,

acceleration and deceleration. Then make several multi-floor runs and check leveling

accuracy. This elevator should level within ½ inch of landing at each stop. Observe

acceleration and deceleration for smooth transition. Adjust as needed.

1.4 CAR DOOR OPERATION

Observe the door for proper operation including speed, smooth movement, starts and stops

without slamming and bouncing. Check the door closing time; it should be between 2.5 and

2.8 seconds and opening time should be 2.1 seconds and the door dwell time for car calls

should be at between three and five seconds. Note any roughness or noise to be checked

from the car top. Test the door closing force and adjust to between 20 and 25 Ibf. If

necessary, examine operation of the mechanical door reopening device. It should operate

with a gentle touch and movement of ½ inch or less, check the lens and reflectors on the

photo devices located at five and 29 inches from the floor. Verify that they will hold to door

open for at least 20 seconds before it goes into nudging.



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1.5 RIDE TERMINAL TO TERMINAL

Run the car from terminal to terminal and observe for smooth travel and unusual noises.

Listen for the door hitting sills or fascias. Note any vibration as car approaches the terminal

landings. Observe operation of position indicator lights and audible signal when passing

floors. Make all needed repairs or adjustments. Note any noise or roughness to be checked

from the car top.

1.6 CAR LIGHTS & VENTILATION

Observe car lighting and ventilation openings. Report any need for maintenance or repairs

to the building manager and your supervisor. Check operation of ventilation fan, clean and

repair as needed. Also Verify proper operation of the car emergency light and repair as

needed.

1.7 RESTRICTED OPENING DEVICE MECHANISM

Examine the restricted opening device mechanism for proper operation. Adjust so that it

will not allow the car door to be opened more than four inches if the car is 18 inches or

more from the landing.

OUTSIDE HOISTWAY

2.1 HALL CALL STATION AND LANTERNS

Examine hall stations and directional lanterns for condition. Replace all burned out lamps in

buttons and lanterns. Note operation of audible signal of car arrival (once for up and twice

for down). Make any needed repairs. Verify that the door dwell time for hall calls is at least

five seconds and not more than eight se6onds.

2.2 HOISTWAY DOORS

Examine door panel and clearance between panels and entrance frame. This clearance must

be less than 3/8 inch. This should be measured with a light force on the door panel to

include bottom sill gib wear.

2.3 HOISTWAY DOOR UNLOCKING DEVICE ACCESS

Examine the hoistway door unlocking device access escutcheon for damage that could allow

the door to be opened with ordinary tools.



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MACHINE ROOM

3.1 HOUSEKEEPING

Clean the machine room floor to prevent slipping and tripping hazards, fire hazards and

contamination of the equipment. All drip pans should be emptied and the oil discarded in

the waste oil contained Log the quantity of oil discarded and compare to the quantity of oil

added to detect underground oil leaks. Always open lock out and tag-out the mainline

disconnect, when cleaning under motors, pumps and belts. Also note temperature in the

machine room.

3.3 PUMPING UNIT INCLUDING MOTOR

Before removing cover allow the unit to run and examine for:

• Noise such as belts slipping or loose pump or motor mountings

• Excessive or unusual vibration

• Hammering or heavy vibration as the car approaches the top floor may be caused by

cavitation due to low oil level or restriction in the pump intake,

• Excess contact noise or other evidence of improper starter operation

Remove the cover or guard and examine the pump unit with power off for:

• Excess oil leaking around pump shaft seals and pipe connections. Empty all oil drip

pan containers and record the quantity of oil discarded.

• Condition of belts including tightness and fit in sheave groove. If belts are worn,

make a note to obtain a new matched set for replacement.

• Excessive motor temperature /

• Motor lubrication. This hydraulic pump motor has sealed bearings and does not

require lubrication.

3.4 CONTROL VALVE

Examine the control valve for

• Leaks around the control body and pipe connections.

• Relief valve seal is in place to prevent changing the adjustment without breaking the

seal

• Wiring and solenoid covers in place

3.5 TANKS

Examine tank for:

• Leak

• Cover is in place

• Adequate oil level. Run car to top landing and use the dip stick to gauge adequate oil

level discarded from leak drip pans. If more oil is added than is discarded, a possible

underground leak is indicated.



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• Condition of oil indicating excess foaming and contamination

• Burning odor and report/if found

• Excessive oil temperature

• Replace the tank covered vent opening

3.6 PIPING, MUFFLER AND MANUAL VALVE

Examine for:

• Leaks and loose connections

• Adequate support, especially note any movement when the elevator is operating

• Grooved pipe fittings for secure bolting of housing segments and pad to pad

connection. If a grooved pipefitting is leaking, replacement is required.

3.7 CONTROLLER AND MOTOR STARTER

Examine the controller and motor starter for:

• With the mainline disconnect opened locked-out and tagged-out clean the controller

with a vacuum.

• Contacts for condition and remaining contact material

• Especially examine the motor starter contacts for pitting (welding) and condition of

the arc quenchers and terminal tightness.

• Examine compression springs for condition. c. Fuses for correct size and fit in

holders and corrosion in fuse holder. Fuse size and type are marked adjacent to each

fuse clip.

• Relays for worn shunts and sign of overheating.

• Lubricate the pivots of the power contactors with one or two small drops of machine

oil (low viscosity like used in a sewing machine).

• Examine all connections for evidence of overheating.

TOP OF CAR

4.1 STOP SWITCH

Before entering the top-of-car, place the stop switch in the stop position. Then allow the

doors to close and verify that the car will not run.

4.2 TOP-OF-CAR OPERATING DEVICE AND LIGHT

Examine the top of car operating device and test for proper operation. Any needed repairs

must be made to the top-of-car operating device, stop switch and light before proceeding

with other maintenance. Always maintain the guard on the top car light. If the guard is

missing must be replaced. Make any needed repairs.



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4.3 CLEANLINESS

Clean all debris and any oil stains or puddles from the car top. Never store anything,

including tools, parts or lubricants, on the car top. Verify that the top car exit is secured so

that it cannot be opened from inside the car.

4.4 TOP CAR GUIDE

Examine roller guide tire conditions as well as fit and alignment with the rail. Examine and

adjust rollers for firm contact with the rails so that they can be just barely turned by hand.

Lubrication the pivot bushing with a couple of drops of (3 in 1) machine oil through the hole

in the housing.

4.5 GUIDE RAILS

Examine the guide rails for loose fastenings and fit at the joints.

4.6 SELECTOR TAPE

Examine the stationary selector tape by shining a flashlight beam parallel with the tape and

sighting to detect any bends or cracks. Examine the sensor guides on stationary tape for

wear. If the guide groove is twice the width of the tape thickness, it should be replaced.

Examine the magnets on tape for grime buildtip0or materials that may interfere with their

operation.

4.7 TRAVELING CABLES

Examine the traveling cables for wear, chafing, kinking and aliment. Examine attachment

points for secure fastening and looseness. Examine for chafing points, i.e. beams, bolts,

rough wall etc. If found, protect as necessary. Examine the automatic tightening means for

slippage of the cable through the grips.

4.8 DOOR OPERATOR

Examine door operator for:

• Loose parts including all fastening.

• Lubrication in gear reducer and shaft bearings.

• Condition and tightness of V belts.

• Set screws, keys and pulleys are moved out of position

• Clean the drive chain with brush to remove dust accumulation. If necessary, lubricate

lightly at the sprocket with special chain lubricant (White Lightening). Wipe off

excess.

• Condition of cam and switches

• Clean control boards, cams, etc with brush and vacuum

• Door operator motor brushes and condition of commutator

• Sound isolation mounting for damage, if used



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4.9 DOOR HANGERS, LOCKS, ETC.

• Attempt to open the hoistway door without unlocking to verify that the interlock is

functioning properly.

• Move the interlock pickup and manually open the door. Then verify that it will close

when released at any position.

• With the door open attempt to move the car using the top-of-car operating device.

• Manually open the door and allow it to close to observe any roughness in the roller

bearings, tires or track. Also, listen for noise that may indicate dragging or

• binding.

• Check the upthrust clearance and adjust for 0.008 inches clearance,

• Visually examine the upthrust, hanger and relating cables for damage and need for

adjustment.

• Note the overlap of door panel and door frame and multiple speed panels when the

door is closed. It should be atleast 5/8 inch. Worn or missing resilient stops,

adjustment or relating devices can affect the overlap. Adjust and/or replace resilient

stops as needed. Move the car down and examine the sill guides for wear, looseness

and damage. Tighten the mounting brackets when necessary. Verify that the guides

and

• metal parts engage the sill track at least ½ inch. Also, verify the clearance between

the bottom of the door panel and sill is less than 3/8 inch and the panels are not

dragging on the sill.

• Examine the astragals for wear and damage

• Examine the sight guards for damage and secure fastening to the door panels.

• Examine the fascia plate fastenings for tightness. Examine door closing device

including, air cord and attachments for fraying and damage.

• Attempt to move the bottom of the panel open. It should move no more than one

inch per panel with 30 Ibf. If it moves more, the upthrust roller probably needs to be

adjusted to run closer to the track. The clearance between the upthrust roller and

track should be adjusted to 0.008 inch.

• Examine the hoistway door unlocking device brackets and tabs for proper position.

4.10 CAR FAN

• Clean car ventilation and fan opening. If necessary, remove the fan and clean the

blades or squirrel cage. At six months, place one drop of oil (3 in 1) on each end of

fan motor shaft.



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4.11 HOISTWAY CLEANING

• Clean dirt and trash from all horizontal surfaces including car and entrance sills. Pick

up large pieces with a dustpan and brush. Use a shop vacuum to remove small items

and dirt when necessary. Do not clean by blowing the trash. Be on the lookout for

any hazardous object or material in the trash. Dispose of the trash in the dumpster

by the rear dock.

4.12 OTHER

Note and report any problems in or within the hoistway that should be addressed such as:

• Unauthorized equipment installed in the hoistway such as electrical wiring,

telephone wiring, grounding from roof antennas, antenna wiring, water piping.

• Damage to the hoistway enclosure that would affect its fire resistance rating.

• Evidence of intentional acts such as pouring or sweeping liquids and trash over the

entrance sills into the hoistway

• Any evidence of unauthorized people entering the hoistway

4.13 LEAVING CAR TOP

• When leaving the car top, remove all tools and supplies (i.e. Car top stop switch to

stop position, return to normal operation, Turn off the light, step off and return stop

switch to run position.)

• Never store lubricants, tools, supplies or anything on the car top. Do not leave the

car top on the third or fourth floor where the light colored carpet is in the halls.

• Always clean your shoes to prevent tracking oil or dirt on the building floor. Allow

the door to close, place a call and verify that the car operates correctly before

removing out of service signs.

PIT

5.1 STOP SWITCH AND LIGHT

• Examine operation and condition of the stop switch before entering the pit. Place

the top switch in the stop position and close the doors to verify that it will prevent

operation of the elevator.

• If the stop switch does not function properly, it must be repaired before and other

work is done. Also, make any needed repairs to the pit light.

5.2 CLEANING

• The pit should be cleaned using a dustpan and broom. Never pick up trash with your

bare hand. Also, examine the bottom level landing sills and clean as needed.

Return any valuable, keys or other items to the building management. Examine the

fascia below the lower landing for secure fastening.



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5.3 BOTTOM CAR GUIDES

• Examine lower roller guides for:

• Condition of the tires and fit on the rail. If needed adjust for firm fit against the rail,

so that they can be just barely turned by hand.

• Alignment with the rail

• Evidence of wear of support pivots

• Lubrication the pivot bushing with a couple of drops of (3 in 1) machine oil through

the hole in the housing



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MAINTENANCE CHECK CHART FOR YEAR 2007

Building Address: Shakamba Towers, Opp. Sterling Hospital, Gurukul rd,Memnagar-380052

Elevator ID #1 Location in Blocks ‘A’ 'B' & ‘C’

INSIDE CAR Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec

1.1 Car interior * * * * * * * * * * * *

1.2 Car controls & Panel * * * * * * * * * * * *

1.3 Leveling, Stop, Accel & Decel

* * * * * * * * * * * *

1.4 Car doors operation *

*

*

*

*

*

1.5 Ride Terminal /Terminal * * * * * * * * * * * *

1.6 Car lights & Ventilation * * * * * * * * * * * *

1.7 Door Restrictors * * * * * * * * * * * *

OUTSIDE HOISTWAY

2.1 Hall call station/lanterns * * * * * * * * * * * *

2.2 Hoistway doors *

*

*

*

*

*

2.3 Unlocking device access * * * * * * * * * * * *

2.4 Firefighters Service tests * * * * * * * * * * * *

MACHINE ROOM

3.1 Housekeeping * * * * * * * * * * * *

3.2 Trash & used parts & oil * * * * * * * * * * * *

3.3 Pumping Unit & motor * * * * * * * * * * * *

3.4 Control valve * * * * * * * * * * * *

3.5 Tank * * * * * * * * * * * *

3.6 Piping, Muffler & Valves * * * * * * * * * * * *

3.7 Controller and Starter * * * * * * * * * * * *

TOP OF CAR

4.1 Top car Stop Switch * * * * * * * * * * * *

4.2 Operator & light * * * * * * * * * * * *

4.3 Cleanliness * * * * * * * * * * * *

4.4 Top Guides * * * * * * * * * * * *

4.5 Guide Rails * * * * * * * * * * * *

4.6 Selector Tape * * * * * * * * * * * *

4.7 Traveling Cables * * * * * * * * * * * *

4.8 Door Operator * * * * * * * * * * * *

4.9 Doors, Hangers, Locks

*

*

*

*

*

*

4. 10 Car Fan

*

*

4.11 Hoistway Cleaning

*

*

4. 12 Other * * * * * * * * * * * *

4.13 Leaving Car Top * * * * * * * * * * * *

PIT

5.1 General and Safety * * * * * * * * * * * *

5.2 Stop Switch & Light * * * * * * * * * * * *

5.3 Cleaning * * * * * * * * * * * *

5.4 Bottom Car Guides * * * * * * * * * * * *



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FREQUENTLY ASKED QUESTIONS

Q1. Is the License of the Lift available or not? If not, why?

Ans. Yes the License for the lift is available and it’s been renewed time and again.

Q2. What are the problems in relation to maintenance?

Ans. The lift is adequately maintained with regular monthly inspection and there no

bothersome problems which can affect the smooth working of the lift.

Q3. Is the system installed properly working or not?

Ans. Yes the lift is properly working for 24 hours every day.

Q4. What is the opinion of the user?

Ans. The user is satisfied with the lift’s working and feels even more satisfied since the

money they are spending in its maintenance is adequately utilized.

Q5. Can the lift be updated?

Ans. Yes it can be updated to increase its efficiency.

Q5. What are the possible solutions?

Ans. The waiting interval of the lift can be improved from 37.5 seconds to 34 seconds if the

collapsible doors can be replaced with hydraulic doors or with Centre opening doors.

Q6. Does it fulfill the requirement of user?

Ans. With reference to handling capacity it is quite sufficient and plus the user’s opinion is

also optimistic thereby proving it the fulfill the user’s requirement

Q7. Is the frequency to call the maintenance people sufficient?

Ans. Yes the frequency to call the maintenance people is sufficient since the lift is serviced on

a monthly basis.

Q8. Is there any problem like too much waiting interval etc. faced by the user? Did the

user fix the problem? Was that solution satisfactory enough?

Ans. Few years ago there were complaints that the lift had too much waiting interval which

was around 45 seconds due to poor maintenance of doors which was the main reason. So all

the doors were replaced by newer ones which improved the waiting interval to 37.5 seconds.

The solution did satisfy the user.

Q9. Has there been any accident reported uptil now?

Ans. No there are no reports of any accident happening in the lift from the time since the lift

was installed



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CONCLUSION

From the case study of we come to the following conclusions, they are as follows:

• QUANTITY OF LIFT:

o The lift has adequate handling capacity of 14.81% which is quite sufficient for

residential buildings. Hence it is very efficient in terms of quantity.

• QUALITY OF LIFT:

o The lift has a fair amount of waiting interval of 37.5 seconds which can be

improved further

o However the lift is adequately maintained, hence satisfying its users. Its

monthly maintenance is quite sufficient to maintain the lift’s quality

Hence the lift that we studied is sufficient both in terms of QUANTITY & QUALITY. However

with certain modifications the lift would be even better

lift & fire safety case study -of a 10 yr old elevator- ahmedabad-cept university

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