Presentation on theme: "ICT in Prefabrication & Precast Housing An SE CAD Case Study 7 th Industrialized Building System (IBS) Roundtable Workshop LIEW YONG SEONG B.Eng. (Hons.),"— Presentation transcript:
ICT in Prefabrication & Precast Housing An SE CAD Case Study 7 th Industrialized Building System (IBS) Roundtable Workshop LIEW YONG SEONG B.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…
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 population live in HDB flats, and most of them are precast. The HDB structural system is prebuilt in SE CAD precast component database.
It’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
Conventional RC design and detailing Conventional RC design and detailing The designers and checkers night mare! Hundreds of drawing to be drawn, checked and archived
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 through standardization & serialization Structural Steel Better standardization Steel Database Universal Naming Convention Efficient Reference, Design, Checking, and Logistics
BEAM CAGE CODE J/U/P 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 1 st 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 SERIES P 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!