2013 CIB Tokyo IDDS&BIM Oneday Seminar (11/1)

Study on application BIM technologies
for building certification on technicalstandards conformity-Introduction of research of the BIM technology
in the Building Research Institute

Masaki MUTO, Dr. Eng.
Senior Research Engineer
Dept. of Production Engineering, BRI
1

Summary• To introduce electronic submission for building certificate
procedure including BIM technology are expected for
streamlining on confirmation of building technicalstandards. And some countries already started electronic
submission with BIM technology now, e.g. Singapore.
• Building Research Institute executes the R&D projectwhich is aimed to clarify bottlenecks in conventionalbuilding certificate procedure, subjects of introduction
electronic submission and application possibilities of BIM
on the procedure from FY2012 to FY2014. This topic
gives a progress report of our R&D.
2BRI ‘s R&D Activities
The Building Research Institute (BRI) has been conducting various research anddevelopment from the fair and neutral perspective of a public-sector research institute.
4 Targets of R&D shown by the MLIT
Realization of Sustainable Housing,1) Buildings and Urban Communities byGreen Innovations
Realization of Secure and Safe2) Housing, Buildings and Urban
Communities
Maintenance and Revitalization ofExisting Housing, Buildings and Urban
3)
Communities Coping with theDeclining and Aging Population
International Contributions by Building4) and City Planning Technology andResponse to Informatization
3Typical Procedure of building certification
ApplicantConfirmationbody

Application drawings and its contents
高さ、道路幅員・・・

配置図
各階平面図

各室の用途、床面積・・・

断面図

居室の天井高さ・・・

CAD

仕上表

Architect(Substitution)○○××㊞

令129条規定部分・・・

Architect’s seal is needed.
The mismatchingsometimes arises
between documents.

Application form
確認申請書

confirmation by paper based
documents

設計概要、設計者・・・○○××㊞

Client’s seal is needed.

Client(Representation)archive application
documents

Certificate of building
conformity

4

Backgrounds 1/2
By the legal revision in 2007, a duty of preservationof the application documents on building
confirmation for 15 years was imposed upon theconfirmation body.
Since the application is made on the basis of paper
medium, confirmation body is regarding as
problems the preservation place and its cost, ordocuments lost.
Since CAD is generally used, issubmitting digitized application
documents and confirming possible?

5Backgrounds 2/2
After the incident which camouflaged earthquake
resistance (called “Aneha” incident), the procedureof the building confirmation tightened and changeof the contents in the procedure became difficult.
Therefore, the preliminary consultation before a“formal reception” is prolonging the confirmation
period so that there may be no inconsistency in thecontents of application documents.
Is the BIM technology which can unify
building properties inapplicable?
6

The aim of this research
To develop the technology of the electronic
application of the building confirmation for achieving
the following aims;(1) Digitize the document for application preservedby the confirmation body.
(2) Improve the compatibility of the descriptive
content of documents for mitigating a labor
required for confirming work.
7Perspective of development
Confirmationbody

Application documents and its contents
高さ、道路幅員・・・

配置図
各階平面図

各室の用途、床面積・・・

断面図

居室の天井高さ・・・

仕上表

CAD

○○××㊞

令129条規定部分・・・

confirmation by paper based
documents

XML etc.

e-documents
3D Building model

definition of Property
sets and model viewelectronic
signaturereplacedwith sealing

BIM model data
IFC XML etc.
(unified)confirmation by
e-documents w/
contents data

Viewerconfirmation by
BIM model data

Step 3BIM

contents data

confirmation by
Scanned image

Step 2PDF
DXF etc

document formats / workflow

Photo scanned image
method of compatibility reservation

Step 1PDF

CAD

Conventional

Applicant8Perspective of development
Confirmationbody

Application documents and its contents
高さ、道路幅員・・・

配置図

Conventional

Applicant

各室の用途、床面積・・・
各階平面図
Development of the data structureof a building
Development of the information use
design 断面図
居室の天井高さ・・・ process in building confirmation
Product Model = IFC, IFD
Processconfirmation
Model = by
IDM,MVD
仕上表paper based
令129条規定部分・・・
○○××㊞
CAD
documents

XML etc.

e-documents
3D Building model

definition of Property
sets and model viewelectronic
signature
replacedwith sealing

BIM model data
IFC XML etc.
(unified)confirmation by
e-documents w/
contents data

Viewerconfirmation by
BIM model data

Step 3BIM

contents data

Step 2PDF
DXF etc

confirmation by
Scanned image

Step 1

Photo Scanned image
method of compatibility reservation

document formats / workflow

CADPDF

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Detail of development steps
Step1

2

Target ofdevelopment
step

confirmation by
Scanned image

confirmation by
e-documents w/contents data

confirmation by
BIM model data
3

Core technology needed•electronic signature (= long term signature and multiplesignature) corresponding to image file format•workflow diagrams or document formats corresponding
to electronic submission(Add to Step 1.)•electronic signature (= long term signature and multiplesignature) corresponding to data file format•method of compatibility reservation between edocument and contents data
(Add to Step 1.)•electronic signature (= long term signature and multiplesignature) corresponding to BIM model file format•Definition the data structure of a building design (=IFC,IFD)•Development of the information use process in building
confirmation(=IDM, MVD and Viewer Application)

contribution to problem
solving(2)(1)
Improve theDigitize thecompatibility
documentof thefor
descriptive
application
content ofdocuments
Good

n/a

Excellent

Good

Excellent

Excellent10Research procedure / targets of development
FY2012

Fix the development stepsand select the target ofbuilding classification
Targets: general buildings

FY2013

FY2014A design and trial productionof an electronic submission
prototype system

Trial of a prototype system,and decision of technicalspecification for electronicsubmission

Targets: ONLY small wooden houses

Categorize IV* at Building Standards Act*Number of stories ≦ 2;
Total floor area ≦ 500m＾2;
Building height ≦ 13m;
Eave height ≦ 9m

11Why we chose small wooden houses?
Reason 1: Compared with the building of other categories, structural
checking is simple and suitable for modeling the whole procedure of theapplication.

(Source: “Introduction to the Building Standard Law” / The Building Center of Japan <www.bcj.or.jp>)12Why we chose small wooden houses?
Reason 2: There are many rates of the confirmation number of Cat. IV (itaccounts for 70%) and the use of the technology developed is huge.
100%

45000042590040000040800935000039772539050990%39728080%36607570%

30000060%

250000Cat. IV
200000150000100000Cat. I, II and III

50%
40%

Cat. I, II and III
Cat. IV

30%
18163816542414159315202115225015772750000

20%
10%0%0FY2007 FY2008 FY2009 FY2010 FY2011 FY2012

Situations of the latest building confirmation (FY2007-FY2012)(Source: MILT < http://www.mlit.go.jp/jutakukentiku/build/jutakukentiku_house_fr_000032.html >)13

Study on the product model
The aims of this study are as follows:
1. Exploring the storing method of required
information by getting to know the creation
procedure of the actual confirming application
documents using BIM authoring software.
2. Exploring about the compatibility of a building
model which made for wooden house.

14

Exploring the storing method• Some guidelines of the drawing manner for
paper based applicant documents printing areprepared.
• These guidelines are made for the purpose ofobtaining the form output which is sufficient for
the requirements for application, making full use
of a function peculiar to software.

15

Exploring the storing method
Store data relating inbuilding project and export
to application form using
BIM authoring software(Source: Graphisoft Japan<http://www.graphisoft.co.jp/ >)16

Exploring the storing method
Edit of the dimension line
by 2D drawing function, anda drawer line label, and theoutput to a plan view

(Source: Graphisoft Japan<http://www.graphisoft.co.jp/ >)17

Exploring the storing method
The output to the front road and regulationline which were linked to 3D building
model, and a sectional view

(Source: Graphisoft Japan <http://www.graphisoft.co.jp/ >)18

Exploring about the compatibility
The model of the 2-story wooden house having thedata for confirming application was created using
two kinds of BIM authoring software, and it wasverified whether the compatibility of information
would be maintained by the IFC data format.
case1: ArchiCAD to Revit via ifc
case2: ArchiCAD to ArchiCAD via ifc
case3: Revit to ArchiCAD via ifc

19

Exploring about the compatibility（ArchiCAD→Revit）

ifc

・ArchiCAD・Revit20

Exploring about the compatibility（ArchiCAD→Revit）

21

Exploring about the compatibility（ArchiCAD→ifc→ArchiCAD）

ifc

・ArchiCAD

・ArchiCAD

22

Exploring about the compatibility（ArchiCAD→Revit）

23

Exploring about the compatibility（Revit→ArchiCAD）

ifc

・Revit・ArchiCAD
24

Exploring about the compatibility（Revit→ArchiCAD）

25

Conclusion of this study•By BIM authoring software, the information
describe in confirming application documents isstored as project information, is managed by 2D
drawing function, or is linked with 3D building
model object.
•However, there is no guarantee by which thesepieces of information is standardized such as IFC,
because these information stored by software
native format.
26

Conclusion of this study•Since this has the insufficient function in whichsoftware outputs and inputs the information on abuilding model in an IFC format, the present stageof the compatibility of the model through IFC isinsufficient.
•In order to deal with a BIM model by building
confirmation, it is important to define IFC requiredfor confirming application independent of thefunction of BIM authoring software, and to appeal
for software vendors to output the information
satisfactorily from the software.
27

Study on the process model•The processing method of the electronic signatureor BIM model data in building confirmation areresearched using reference from domestic andforeign advanced cases.
•The research consortium which involved in an
academic sector, architect office, the house maker,
the general contractor, the software vendor, and theconfirmation body is under organization.

28

Now status of our research•As an overseas advanced case, a research on theelectronic application (e-submission) of theSingapore government was conducted.
•Gathering and analyzing of information about thefunction and composition of the prototype system todevelop was started.

29

Research on the SG e-submission•Date：2013/9/13•Venue：Building and Construction Authority (BCA)
MND buildingResearch on the SG e-submission•Unlike our country, thesupervisory authority of urban
or building regulation is dividedin Singapore.
‐URA: Urban regulation‐BCA: Building regulation•E-Submission guideline forarchitectural discipline ispublished from BCA.
31

Research on the SG e-submission• In SG e-submission, the data formats which eachgovernment office required are different.
URA→Native Format of BIM authoring Software （e.g. Revit,ArchiCAD）
BCA, and the others→ 2D drawing format includes 3D model which wasoutputted from BIM authoring software （DWG, PDF）
※building confirmation is based on 2D view.
32Research on the SG e-submission• After confirmation, the image of 2D drawing is exported toa microfilm, and archived eternally.
The point of SG e-submission
・Even if the application documents are received as data,
they are not archived as data.
・The 3D model submitted is only used as reference.
→SG e-submission is positioned in the middle of Steps 2
and 3 with our perspective of development.
33

Research on the SG e-submission
Concerns of compatibility
URA

Applicant (QP)
BIM Native

Compatibility isOK?

BIM Native
2D output

BCA

Compatibility isOK?
Combined
DWG/PDF
3D output

Moreover, step-by-step building confirmation is accepted in SG.
How does compatibility secure between each confirmation stage?

34Viewpoint for Prototype system development• At present, it is difficult to perform building confirmation
by perusing a BIM model directly.
• How to treat 3D model based on 2D view of SG esubmission is realistic solution.
• At Prototype system of BRI, some technologies
insufficient in SG case is implemented aiming at
improvement compatibility and electronic archive.
• The definition of the BIM model for building confirmationis considered supposing development of the viewer which
can make checking view from BIM model directly.
35

Image of Prototype System
IFC, XVL, 3D-PDF+XML…
CAD

Definition of BIM Model forbuilding confirmation
配置図
各階平面図
断面図
仕上表
○○××㊞

BIM
Contents: Plan, Specification, Performance-based requirements,incl. addendum, amendment, annotation in checking process
CAD/BIM supplement
software for applicant-making application
data+Tables+2D drawings+3D model-Self Checking
function

ASP services system

Confirmation tools-Electrical Signatureattempt for+XML+PDF-Workflow design-Communications
support-History Archive-Checking function-Applicant docs. Viewer+tables+2D drawing required
regally+3D model forreference 2D Drawing-Editing annotations/comments

36Difficulty of Confirmation Checking by Model View
Expression which
Authoring or Viewing
software interpretsand displays from amodel

BIM MODELAs development of the 1st phase, the unifying-to model-view of 2D drawing regally requiredis developed instead of development of an advanced viewer.

37Difficulty of Confirmation Checking by Model View
application data
CAD

Compatibility
is OK?
BIM

Extraction

application data

Compatibility
is OK!

BIM

BIM Authoring Workflow using one BIM Model38

The method of the compatibility maintenanceduring a file of views
Example of indication
CAD

Used software：ABC-BIMpro.v17
Filename of Model：teishutu-1
Created：20YY.MM.DD
Corrected final：20yy.mm.dd
TRIP-CODE：◆WBRXcNtpf.

BIM
2D View (required regally)○○邸 新築工事
1階 平面詳細図作成ソフトウェア：ABC-BIMpro.v17
モデルデータファイル名：teishutu-1
作成日時：20YY.MM.DD
最終修正日時：20yy.mm.dd
TRIP-CODE：◆WBRXcNtpf.

The display which shows generated“AT ONCE” from the “ONE”, “Unified”
BIM file
39

Digital Achievement with Long-term e-signature
SG e-submission

microfilms

Digital Achievement

Application Data（IFC, XVL,3D-PDF+XML…）PDF Long term e-signature（PAdES)

The validity of the signature for at least 15 years is secured byintegrating application books data as an attached file (Trailer)of PDF (ISO-32000s), and attaching a long-term signature tothe file.

40

An Idea of definition of BIM Model for building
confirmation (under discussing on WG)

Contents of Data

Data Format

3D ModelIFC（2x4 or 2x3）

2D Drawing

Unified to 3D Model by IFC 2D objects

Scanned Documents

PDF (unified IFC if possible)

Traceability DataXML41

Thank you for your attention!

© Building Research Institutemuto@kenken.go.jp
http://www.kenken.go.jp/
42