Post on 05-Apr-2018
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RECO2006 Construction IV
Transportation System Lifts and Escalators
Edward CY YIU
Department of Real Estate and Construction
January 2007
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Learning Objectives Concepts of Barrier Free Access Design of Vertical Transportation System
Lifts Escalators Stairs (see course materials on fire safety)
Design of Horizontal Transportation System Conveyors Ramps
Maintenance of Transportation System
Links Lift Hong Kong at www.lift.hk EMSD at www.info.gov.hk/emsd
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Authority
Part VII, Building (Planning) Regulations
Design Manual Barrier Free Access 1997
Lifts and Escalators (Safety) Ordinance,Cap. 327
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Building Services Framework
Water in Plumbing System Water out Drainage System
Energy out - OTTV
Waste out Waste Disposal System
Air in MVAC System
Energy in Electricity Supply Systems
People / Goods in Transportation System
Air Out MVAC System
Fire in Gas Supply System Fire out Fire Safety System
People out Transportation
System
Light in Lighting System
Sound in Acoustics System
Light out Lighting System (blinds)
Sound out Acoustics System
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Barrier Free Access
Ramps
Drop kerbs
Handrail
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BFA - Stairs
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What is a lift?
Source: BD(1993)
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Types of Lifts
Electric Traction (Cable) Lift
Hydraulic Lift
Rack and Pinion Lift
Firemans Lift (See CourseMaterials on Fire ServicesInstallations or MOA code)
Dump-waiter (Service Lift)
Observation Lift
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Dimensions of Lift
E.g. Rated Load = 800
No. of passengers = 10 Rated speed = 1.0 2.5 m/s
Car width x depth = 1400 x 1350mm Pit depth = 1700 2800mm (why pit?)
Machine room = 15 sm (why machine room?)
Source: BD(1993)
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Sections of aLift Well Which process first
and how long? Building works of lift
well
Building works ofmachine room
buying a lift
Installation of lift car
Installation of landing
door Installation of machine
and control
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Lift Machine Room
Motor for a Traction Lift
Knowles Building, HKU
motor generator
geared machine
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Source: - (www.howstuffworks.com)
A Traction Lift
A Hydraulic Lift
1-car controland selectorpanel
2-motorgenerator
3-gearedmachine
4-counterweight
5-loadcompensatingcables
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An Escalator
Source: - (www.howstuffworks.com)
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The machine roomless elevator
Application Scope of V8-M Target market: Medium-and-low
residential building and businessbuildingStandard Load(kg): 550,750,1000Speed(m/s): 1.0,1.5,1.75Max. travel: 60 mMax. landings: 20Group-control quantity: 8 setsControl system: Modularmicroprocessor full-collective controlType of traction machine: Permanent
magnet synchronous gearless drive.
http://listing.hk.business.yahoo.com/en/11474/product_details_130270.html
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Traffic Design - Nos. and Size of Lifts
Estimation of population Quality of service required
The up-peak interval of an office tower: 20s or less excellent system 30s satisfactory system
Quantity of service required The handling capacity within 5 minutes
Estimation of arrival rate
Handling capacity = (5minx60x0.8xLift Car Capacity in nos. ofpersons)/(up peak interval x population above terminal floor of
zone)
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Traffic Design (contd)
Round Trip Time (RTT) by up peak model
( ) psv PttSHtRTT 212 +++=Where
RTT = round trip time in seconds
H=highest call reversal floor
S=average no. of stops
tv=time to transit 2 adjacent floors at rated speed in
seconds
ts=time consumed when making a stop in seconds
tp=passenger transfer time for entering or exiting thelift car in seconds
P=0.8xlift car capacity in person
Details refer to EMSD (2000)
S
RTT
tp
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An Example of Lift Traffic Design
An office building of 10 floors above the main terminal is to be built, each floor of 1200 sm of netspace. The interfloor distance is 3.3m.
The required up peak interval is 30s (i.e. satisfactory grade) Estimation of population: assume 12sm per person per floor, i.e. Pop=1200/12=100 persons per
floor Assume 12.5% peak arrival rate, i.e. 0.125x0.8x100x10flr=100 persons Qty of service: Nos of trip in 5 minutes = 5minx60/30s=10 Nos. of person per trip = 100/10 = 10 The required car size is 10/0.8 = 13-person car Total travel distance = 3.3x10=33m Assumed rated speed = 1.6m/s tv=3.3/1.6=2.1s ts=7.7s (from code) tp=1.2s (assumed) P=13x0.8=10.4 persons H=9.5, S=6.7 (from code) RTT=(2x9.5x2.1)+(6.7+1)7.7+(2x10.4x1.2)=124.2s
Since up peak interval required is 30s, i.e. 4 cars are required The up peak interval is 124.2/4 = 31.1s The up peak handling capacity is (300/124.2)x10.4x4 = 100.5 persons / 5min
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DisabledLift
BD (1997)
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Maintenance
S.27C(b) of L&E(S)O, proper maintenance is required tobe carried out by a registered lift contractor to a servicelift at intervals not exceeding 5 weeks.
Detailed requirements on L&E Maintenance, see EMSD(1996)
Safety Precautionary Measures for L&E Maintenanceand Repairs Garley Fire (see Garley Fire Report)
PNAP 209 Maintenance and Replacement Works of LiftInstallations
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References British Standards Institution ( ) BS5655 (EN81) Lifts and Service
Lifts, BS5656 (EN115) Safety rules for the construction andinstallation of escalators and passenger conveyors, BSI, UK.
Buildings Department (1997) Design Manual Barrier Free Access,HK Govt, HK.
Buildings Department (1993) Code of Practice on the BuildingWorks for Lifts and Escalators, HK Govt, HK.
EMSD (1993, Reprint 1997) Code of Practice on the Design andConstruction of Lifts and Escalators, HK Govt, HK.
EMSD (1996) Code of Practice on the Examination, Testing andMaintenance of Lifts and Escalators, HK Govt, HK.
EMSD (2000) Code of Practice for Energy Efficiency of Lift andEscalator Installations, HK Govt, HK.
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The End
For enquiries, please send email to
Edward CY YIUDepartment of Real Estate and Construction
The University of Hong Kong
ecyyiu@hkucc.hku.hk