ICT in Prefabrication & Precast Housing An SE CAD Case Study 7 th Industrialized Building System (IBS) Roundtable Workshop LIEW YONG SEONG B.Eng. (Hons.),

INNOVATIVE DESIGN AND PROCESS

ICT in Prefabrication & Precast Housing

An SE CAD Case Study

7th Industrialized Building System (IBS) Roundtable Workshop

LIEW YONG SEONGB.Eng. (Hons.), M.Eng., MIES, MSSSS

Advance Contech (Singapore) Pte. Ltd.

Outline

What is SE CAD? It’s been a long way – the SE CAD story To maximize repetition through

standardization & serialization What’s ahead?

SE CAD is one of the key enablers for precast/prefabricated housing projects like these…

Pinnacle @ Duxton 55-storey interlinked towers with prefabricated reinforcements and

precast structural and façade components

Precast planks : worth to be considered for site works efficiency

Reference projects are just a stone throw away

On going projects

Queenstown New development

More than 80% of Singapore populationlive in HDB flats, and most of them are precast.The HDB structural systemis prebuilt in SE CADprecast componentdatabase.

The SE CAD storyIt’s been a long way

streamline construction processes to meet the challenges ahead with the use of advanced technologies

In-situ RC construction

Dependent of foreign labours Slow and weather dependent Wastages of materials Difficult quality control Environmental issue Non-systematic and non-standardized

>> Solution : prefabrication/precast technology

Use of conventional software and structural system hinder the use of prefab and precast technology

No standardization Erroneous Difficult to check and archive information

The road-blocks

Conventional RC design and detailing The designers and checkers night mare!

Hundreds of drawing to be drawn, checked and archived

The industry needs a new solution (both software and structural system) that promotes and facilitates the use of prefabrication and precast technologies for housing needs!

Criteria For Residential structure Does NOT rely on proprietary system / components Centralize database:

Eg. Joint details○ Centre reference for tested joint details for beam-wall, beam-

column, etc. Built in proven and tested precast components database of

beam, column etc Serialize name of structural members for easy reference, order

placing, production and site control, which is also third-party database friendly

Extendabie – energy saving study, virsualization etc

Super user friendly – for average user to be productive and expert in doing precast/prefab design.

centralized, reusable knowledge-base and an advanced engineering IT solution that streamlines construction processes!

Goal : A TOTAL Prefab/Precast Solution for Housing!

Prefab Structural System Development

HDB Prefab Structural System

To maximize repetition throughstandardization & serialization

Structural Steel Better standardization Steel Database Universal Naming Convention Efficient Reference, Design, Checking, and Logistics

BEAM CAGE CODE

J/U/P 23 6 1 V

Cage series

Width of Beam

Depth of Beam

Ref. No. or Ref. No. with alphabet indicating type of stirrups

Ref. No. indicating type of main reinf.

Suffix

CAGE SERIES J Series

- Light cage where cage reinforcement are used only for beams with clear span >1.5m.

- J Series is fully shop fabricated with main bars. U Series

- Standard cage where cage reinforcement are generally used for uniformly distributed loading condition.

- Also applicable to light point load condition as specified in the details.

P Series

- Standard cage where cage reinforcement are generally used for point load condition.

- Also applicable to uniformly distrbuted loading condition as specified in the details.

SUFFIXES S – For one span beam (Discontinuous at both

ends), or for beam with depth difference from adjacent beams. Eg. J3612S / U3612S / P3612S

V – For tapered beam and for U & P Series only. Eg. U3621V / P3621V (300X600 – 900)

T – For 1st storey beam tying column / wall (column / wall at one end or both ends). Eg. U3621T / P3612T

B – For beam with non-standard width. Eg. J3612B / U3612B / P3612B

D – For beam with non-standard depth. Eg. J3612D / U3612D / P3612D

H – For beam using H bar stirrup cage. Eg. U4649H

BEAM CAGE – J SERIES

J SERIES – Main Reinforcement & Stirrup

BEAM CAGE – U SERIES

(1 or 2 layers bottom reinforcement)

( 3 layers bottom reinforcement)

U SERIES – Main Reinforcement & Stirrup

BEAM CAGE – P SERIESP SERIES – Main Reinforcement & Stirrup

(1 or 2 layers bottom reinforcement)

( 3 layers bottom reinforcement)

BEAM CAGE – “0” CAGE for U & P Series(ONLY STIRRUP CAGE)

(Main reinforcement are shown in connection details)

BEAM CAGE – T13 BAR MARKED h FOR U OR P SERIES INCLUDNG “0” CAGE

TYPICAL U OR P SERIES CAGE

BEAM LAYOUT PLAN

A handy tool for design engineers

• Efficient knowledge transfer• Know prefab, use prefab, love prefab!

SE CAD

Thank you!

LIEW Yong SeongEmail [email protected] +65.9276.0058