Building Services
Frequent Problems encountered by QS
in Building Services Works
a) prior knowledge on understanding MEP systems
b) prior knowledge on understanding engineering language
c) prior knowledge on understanding interfacing and/or
interdependency relationship between different MEP systems
d) prior knowledge on the installation sequencing and methods of MEP
systems
e) prior knowledge on the statutory requirements on MEP systems
f) prior knowledge on the SMM for MEP systems
g) prior knowledge on the market intelligence of MEP works for
contractual packaging
h) understanding on how to read the MEP drawings
i) how to extract the information given by the engineers for the pricing
of the MEP works
What is MEP Works – Electrical Works
1.0 Electrical Installations
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
incoming power supply
mains and sub-mains installations
lighting installation
power installation
cable containment installation
emergency generator installation
lightning protection installation
earthing and bonding installation
miscellaneous works (general works)
2.0 Mechanical Ventilation & Air Conditioning Installation
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Condenser water system
Chilled water system
Condensate drainage system
Air conditioning system
Mechanical ventilation system
Smoke extraction system
Automatic temperature control system
Electrical power and control system
Miscellaneous works (general works)
3.0 Fire Services Installation
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Incoming water supply
Fire hydrant and hosereel installation
Sprinkler installation
Drencher installation
FM200 installation
Automatic fire alarm detection installation
Electrical power and control installation
Portable fire extinguishers
Miscellaneous works (general works)
4.0
ELV Works
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
CCTV System
CABD System
PABX System
Security and Access Control System
Telephone System
Satellite TV System
Broadband installation
Carparking system
BGM System
Patrol Guard System
1.0
2.0
3.0
4.0
5.0
units (e.g. tonnes, kVA, ampere, kW, lux, etc.)
schematic design, line diagram
equipment / materials (e.g. chillers, LV switchboard,
MCCB / MCB, busbar, fused connection unit, fast
response sprinkler head, 2 way motorized control
valve, addressable type detector, axial fan,
centrifugal fan, isolating switch, etc.)
trade (e.g. final circuits, loop, air purging of
pipework, ductwork dropper, drain and refill, pump
head, etc.)
testing and commissioning, point schedule, O&M
manual, preventive maintenance, corrective
maintenance
HVAC
Main Contract
Works
Builder’s
Works
FS
ELEC
P&D
Materials and equipment submission
Builder’s works drawings submission
Shop drawings submission
Coordinated services drawings submission
1st fixing
2nd fixing
Final fixing
FAT / SAT
Testing and commissioning
Fire services regulations
Smoke extraction
Fire retardant system
2 layers of sprinkler heads
Fire alarm detection (hotel)
Interlock with air ventilation
EPD sound emission requirement
EPD – chimney installation
EPD – sewage water discharge (treatment)
Energy Assessment Ordinance
Measurement of Building Services Installations
1. Hong Kong Standard Method of Measurement for
Building Services Works (First Edition May 1993 / Forth Edition
2005)
2. - Electrical Installations
- Mechanical Installations
- Building Management, Security and Communication
Installations
2.1 system classification
2.2 works coverage (e.g. FE, cladding to air duct)
2.3 application (final circuit / wiring & conduits)
3. Things to note:
3.1 interfacing related with building works
3.2 phasing of works
3.3 packaging of works
Market Intelligence on Contractual Packaging
1. Works packaging – separate packages or allin-one package
1.1 technical complexity
1.2 specialization
1.3 value of works
1.4 coordination complexity
1.5 programming of works
2. Lump Sum or Re-measurement
2.1 nature of the works
2.2 basis of tender information
2.3 basis of final approved information
2.4 basis of measurement
Things to note in preparing the Building Services
Tender / Contract Document
1. commencement of works - conditions
2. completion of works - criteria
3. phase completion may affect
- programming of works
- system handover
- defects liability period
- release of retention money
- temporary installations prior to full completion
of a particular system
- maintenance works for partial running prior to
the full completion of a particular system
Payment for Building Services Works
1.
2.
3.
4.
Progress / Stage / Milestone interim payment
Payment for engineering works
Payment for materials on site and off site
Payment assessment
- 1st fix
- 2nd fix
- final fix
- T&C
5. Payment withheld for submission of T&C records,
as-built drawings / records, O&M manual
6. Payment for maintenance works / miscellaneous works
Variation Works for Building Services
Works
1. Entitlements
1.1 change in builder’s works
1.2 change in level of suspended ceiling
1.3 change in door opening direction
1.4 re-partitioning
1.5 change in room function (e.g. from pantry to
kitchen)
1.6 addition of metal framework at external wall
1.7 revision in fire compartmentation
1.8 as required in statutory inspections
Variation Works for M&E Works (Cont’d)
2. Quantum Assessment
- basis of measurement
- change in one item may lead to corresponding
changes in other items (e.g. addition of lighting circuits
will lead to addition of lighting switches; omission of
false ceiling may lead to addition of slim duct to
insulated refrigerant pipe work or cladding to chilled
water pipe work)
3. Rates Assessment
- contract rates
- pro-rata rates
- star rates
Variation Works for M&E Works (Cont’d)
4. Abortive Works
- entitlement
- evaluation
5. Miscellaneous Works
- draining and refilling
- testing and commissioning
- cleaning of works (e.g. air purging, chemical
treatment)
- refueling works
- spare parts and tools