Fface Isarc15 3063655
Fface Isarc15 3063655
Fface Isarc15 3063655
ABSTRACT
1 Introduction
Nowadays, many leading construction companies
are still using 2D drawings, Microsoft Excel or other
spreadsheet programs to prepare tenders regarding The National Building Information Model Standard
MEP trades. 2D drawings are scanned and the (NBIMS) defines BIM as “a digital representation of
quantities of commodities are extracted and physical and functional characteristics of a facility” [1].
imported into spreadsheet programs. This method is In other words, BIM can be defined as the model of a
not accurate and transparent. In addition, too much facility which stores specific or generic information
time and effort is required to keep these files up to about its components as well as its whole lifecycle.
date. On the other hand, the variety of other Such information can be stored in Industry Foundation
solutions are developed to help estimators for a more Classes (IFC) formats. IFC lets BIM models be
accurate and transparent cord calculation. Building transferred easily from one software solution to another
Information Modelling (BIM) is one of the solving one without any problem regarding their format
methods. Nowadays, BIM is applied for many of the limitations.
construction projects, and its usage is growing up The benefits of using BIM and Virtual Design and
worldwide. Truly BIM has been used for Construction (VDC) technologies are listed out in many
Visualization, Clash detection, building design and research works which are done within last decade. As
very more other tasks in building industry; however, example S.Azhar [2] indicates the benefits of BIM as:
its acceptance for quantity take off (QTO) and
following, tender estimation is limited. Currently, - Faster and more effective processes,
not too many quantity surveyors (QS) are using BIM - Better design,
as normally a detailed building model is not - Controlled whole-life costs and environmental
available in the very early stage of a construction data,
project. This research work is done to develop a new - Better production quality,
workflow to use BIM for QTO regardless the
availability of a detailed Building model. It’s tried to In addition, A. Khanzode [3] did apply BIM/VDC
create some logics which simulate the required technologies for the coordination of MEP systems on a
quantities of the commodities. These logics can be $96.9 Million healthcare project in Northern California,
based on defined norms and standards or be created USA. The result of this implementation is:
according to the reached experience of QS.
Subsequently, they will be implemented in RIB - Labor saving ranging from 20% to 30% for all
iTWO to create the variable wizards. These wizards the MEP subcontractors.
create a better user interface to be used by QS for - 100% pre-fabrication for the plumbing
QTO. contractor.
- Only one recorded injury throughout the
Keywords installation of MEP systems over a 23,000
square meters project area.
MEP; RIB iTWO; QTO; Building Model; logics - Less than 0.2% rework for the whole project
for the mechanical subcontractor.
- Zero conflicts in the field installation of the
systems.
- 6 months saving on the schedule. MEP 13%
- About $9 Million saving in cost for the overall
project. Structural 42%
36,2%
Construction Sequencing MEP 22%
Program/massing Studies 31,9%
18,6%
0% 5% 10% 15% 20% 25%
Environmental Analysis