❞ كتاب مخططات اتوكاد لمبنى المحكمة التجارية ❝

مخططات اتوكاد لمبنى المحكمة التجارية

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Table of Contents
InfoComm BIM Taskforce
Members:
David McNell,
CTS-D, LEED AP, RTKL (Chair)
Harry Allison,
CTS-D, Waveguide
Walter Black,
Ph.D., VidCAD Documentation
Programs
Michael Cukrow,
Middle Atlantic Products
Kevin Harrison,
Stardraw.com
Todd Hutchins,
CTS-D, Verrex Corporation
Casey Sherred,
Acoustic Dimensions
Max Shirley,
CTS-D, RCDD, Newcomb & Boyd
Roneel Singh,
CTS, WSP Lincolne Scott
David Wilts,
LEED AP BD+C, Crestron Electronics
Foreword
2
Introduction to BIM in AV
3
Benefits of BIM
7
Considerations and Limitations of BIM
11
Changes to the Delivery Process
13
Key Steps to Successful BIM Implementation
15
Business Implications of BIM
17
The Future
19
Conclusion
21
Glossary 22
Appendices
24
Appendix I – Industry Association Publications
24
Appendix II – Relevant Blogs/Newsletters
24
Appendix III – Websites/Resources
24
Appendix IV – Software
25


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Introduction to BIM in AV
Recently, a quiet revolution has been taking place which will fundamentally change the very fabric of the audiovisual
design and integration business. This revolution is the increased utilization of Building Information Modeling (BIM).
BIM is described as:
... a digital representation of physical and functional characteristics of a facility. As such it
serves as a shared knowledge resource for information about a facility forming a reliable
basis for decisions during its life-cycle from inception onward.
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To under stand the reason BIM is ascending in importance for the AV professional, we need to consider several
facts.
1.
Buildings consume huge proportions of our scarce resources. Resource allocation and reduction are major
drivers toward BIM implementation, whether it be using renewable or recycled materials or reducing energy
consumption. Stakeholders hope that BIM will be key in reducing construction resource consumption.
2.
In 2004 the Construction Industry Institute estimated that
57% of money spent on construction is non-
value-added—which is WASTE.
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With the U.S. construction market estimated at US$1.288
trillion for 2008, at 57% waste, over $600 billion per year is being wasted.
Figure 1: A large portion of the money spent in the construction industry is wasted,
especially when compared to the manufacturing industry.
This is a stark condemnation of the construction industry, which we need to examine.
a.
The bid process and resultant change orders have become the bane of many construction projects.
More disputes arise and more adversarial positions are staked out because of actual or
perceived changes in a construction project than for any other reason. Aggressive
contractors will threaten slow-downs and work stoppages if they don’t get paid.
Overbearing owners will insist that unknown conditions, extra features, and an expanded
project are covered by the original bid price.
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The major culprit here is probably the design-bid-build paradigm, in which each bidder should complete a rough
design in order to provide accurate bids. However, since this is not paid, and even if a company wins 1 out of
10 bids, the engineering time for all 10 bids will be aggregated into its winning job. Plus, if you gave accurate
bids, you would probably not be the low bidder. The bid is then written in such a way that any deviations result
in change orders, normally paid by the owner. This leads to cost overruns, delays, antipathy and errors.
Some owners prefer the design-build paradigm, which favors one contractor and one AV integrator. If the
project is specified correctly, this reduces the bidding costs, but there is no communications vehicle between all
of the contractors, causing change orders because a wall or ductwork appears where the AV system was to be
installed. Thus, traditional design-build may reduce certain costs, but not eliminate errors and change orders
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من الهندسة المدنية - مكتبة كتب الهندسة والتكنولوجيا.