Post on 20-Jul-2018
Er Joseph Toh, IES Head (MEP), MOHH
Design for Manufacturing and Assembly (DfMA)
Prefabricated Mechanical Electrical and Plumbing (MEP) Systems
What are Prefabricated MEP Systems?Prefab Components Sub-assemblies
Integrated Assemblies
MEP PPVC
45% 60% 70%30%
Pre-insulated plastic piping
Prefab horizontal services / vertical riser modules
Prefab vertical riser module with catwalk
Prefab horizontal module with ceiling board
Prefab plant room
Include MEP services onlyIntegrated with architectural/
structural componentsComplete assembly
Plug-and-play cables
1. Labour-intensive
2. Shortage of skilled workforce
3. Poor coordination
4. Compromised workmanship due to compressed timeline
5. Maintenance issues due to poor workmanship and limited access to services
Installation on-site by individual
trade workers
Design Stage
Construction Stage
Installation Stage
Development of Coordinated
Services Drawings (CSD) by
main contractors
M&E consultants develop overall
design
Difficulty in maintenance
due to congested MEP
services
Challenges faced
Duplication of effort in
mounting individual
supports for individual
trades
Clashes on site
Development of individual MEP trades throughout the project cycle
Common MEP Practices in Singapore
Up to 60%* Manpower Savings at Trade Level
Up to 45%* Manpower Savings at Trade Level
Up to 30%* Manpower Savings at Trade Level
Prefab Components Sub-assemblies
Flexible water pipe Prefab air-con metal duct
Flexible Sprinkler dropper Prefab pump module
Ceiling services module
Plug & play cable* Manpower data based on information from
UK, Japan and Korea project data
Prefab MEP Systems Save Time and Manpower
Vertical riser module integrated with platform/ catwalk
Better Health and Safety
Neat and tidy factory
Improved Quality and Productivity
Detailed design is done in advance
Easy to install (lifting one subassembly instead of
multiple ducts, pipes, etc.)
Working in a factory environment and at ground
level will help improve productivity
Benefits of Prefab MEP Systems
Objectives of Guidebook
1. Raise awareness among industry stakeholders;
2. Equip stakeholders with fundamental knowledge in prefab MEP
design, procurement practices, construction and maintenance, etc.
Technical Committee (TC)
Special advisor:
Private SectorPublic Sector
Comments sought from industry and technical agencies
Contents – Prefab MEP Guidebook
Chapter 2 Good industry practices - Procurement
Meetings with contractors and MEP specialists
Early involvement of contractors and MEP specialists
Tender requirements – How to facilitating the adoption of prefab MEP systems
Chapter 3 Good industry practices - Design
Key considerations for design
Guidelines for designing various prefabricated MEP modules
Transportation Ease of MaintenanceLifting & Handling
Chapter 4 Good industry practices - Fabrication
Areas to look out for during fabrication
Quality assurance Ensuring alignment of modules
Protection of modules
Chapter 5 Good industry practices – Installation
Logistics planning
Positioning modules
Connecting modules
Chapter 6 Roles of Different Project Parties
Design of MEP Services
• Consultants
• Main Contractor
• MEP Prefabricator
• MEP Sub-Contractors
Shop Drawings preparation
• Main Contractor
• MEP Sub-Contractors
• MEP Prefabricator
Fabrication, Testing and Commissioning (T&C) in Factory
• MEP Prefabricator
• MEP Sub-Contractors
Coordinating with Site from Factory
• Main Contractor
• MEP Prefabricator
Installation of MEP Modules, on-site T&C
• Main Contractor
• MEP Sub-Contractors
Project work flow and parties involved
Chapter 7 Project showcase
Crossrail Tottenham Court Road MRT Station,
United Kingdom
Riser modules
Horizontal modules
Chapter 7 Project showcase
Global Switch Data Centre, a 6-storey project in Singapore
Plant integrated withchiller water pipe modules
Riser modules c/w platform
Horizontal modules
The first prefab MEP guidebook
The Prefabricated MEP Systems electronic
Guidebook is now officially launched
Download a copy at
https://www.bca.gov.sg/cpc/others/MEP_Guidebook
_final.pdf
Thank you