The Professional Constructor
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Fall 2019 | Volume 44 | Number 02 The Professional Constructor Journal of the American Institute of Constuctors IN THIS ISSUE: Accuracy of Drone Based Surveys to Measure Stockpile Volume Effects of Organizational Trust and Project Delivery Variables on BIM User Confidence Building Information Model-Based Quantity Takeoff - Leadership Support and Training Attraction and Retention of Minority Managerial Employees at Electrical Contractors Commercial Construction Schedule Collaborators and Current Scheduling Practices Fall 2019 | Volume 44 | Number 02 The Professional Constructor Journal of the American Institute of Constuctors ABOUT THE AIC OUR MISSION Founded in 1971, the American Institute of Constructors • To promote individual professionalism and excellence throughout the related mission is to promote individual professionalism and fields of construction. excellence throughout the related fields of construction. AIC supports the individual Constructor throughout their • A qualifying body to serve the individual in careers by helping to develop the skills, knowledge, construction, the Constructor, who has achieved a recognized level of professional competence; professionalism and ethics that further the standing of the construction industry. AIC Members participate • Opportunities for the individual constructor to in developing, and commit to, the highest standards participate in the process of developing quality of practice in managing the projects and relationships standards of practice and to exchange ideas; that contribute to the successful competition of the • Leadership in establishing and maintaining construction process. In addition to membership, high ethical standards; the AIC certifies individuals through the Constructor • Support for construction education and research; Certification Commission. The Associate Constructor (AC) and Certified Professional Constructor (CPC) • Encouragement of equitable and professional relationships between the professional are internationally recognized certifications in the constructor and other entities in the construction industry. These two certifications give construction process; and formal recognition of the education and experience that defines a Professional Constructor. For more • An environment to enhance the overall standing of the construction profession. information about the AIC please visit their website at www.professionalconstructor.org. Approximately 10-15 articles are published annually in The American Professional Constructor. To maintain our high standards of publication, AIC requires the support of competent and committed reviewers. We would like to express our deep gratitude to the following reviewers of the articles published in the Journal’s Spring and Fall 2019 Issues: Andy Wasiniak, Endong Wang, Mike Holland, Dave Fleming, Lana Coble, Eric Vechan, George Morcous, Matthew Rasmussen, Aiyin Jiang, Easy Foster, Bernard Ashyk, Joseph Burgett, Mark Ferdele, Mike Golden, Wayne Jensen, Gary Smithey, Ihab Saad, Saeed Rokoeei, Hoyt Lowder, Tariq Abdelhamid, Curtis Bradford, James Williams, Matt Syal, Heber Arch, Kenneth Tiss, Brian Sheehan, Zhigang Shen, Edward Medley, Akpan Nsikak, Mohammed Choum, Todd Morrison, and Richard Ryan The American Institute of Constructors | 19 Mantua Road | Mount Royal, NJ 08061 | Tel: 703.683.4999 | www.professionalconstructor.org — Page 2 — Fall 2019 | Volume 44 | Number 02 The Professional Constructor Journal of the American Institute of Constuctors President Vice President Brian Holley, CPC Brad Monson, CPC VScenario Colorado Dept. of Public Health & Environment Secretary Past-President Scott Cuthbertson Greg Carender, CPC PwC EdgeConneX Treasurer Mark Hall, CPC Hall Construction AIC BOARD OF DIRECTORS 2019 National Elected Directors Non-Voting Past-President Directors Joe Burgett (Elected) (2016-2019) Greg Carender (Immediate Past President) Bradley Monson (Elected) (2017-2020) Joe Rietman, (Past-President) Lana Coble (Elected (2017-2020) Paul Mattingly (Past-President) Thad Nicholson (Elected) (2017-2020) David Fleming (Past-President) Robert Aniol (Elected)(2017-2020) Tanya C. Matthews (Past-President) Scott Cuthbertson (Elected) (2017-2020) Andrew Wasiniak (Past-President) Eric Vechan (Elected) (2018-2021) Mark Giorgi (Past-President) Jason McAnarney (Elected) (2018-2021) David Mattson (Past-President) Murray Papendorf (Elected) (2018-2021) Steve DeSalvo (Past-President) James Hogan (Elected) (2018-2021) Jim Redlinger (Past-President) Greg Bradshaw (Chair, Constructor Certification Commission) Jason Lucas (Chair, Publications Committee) Eric Vechan (Chair, Programs & Education Committee) Austin Beaver (Chair, Corporate Sponsors Program) Jim Nissen and Murray Papendorf (Chair and Vice-Chair, Membership Committee) Bailey Buffalo (Chair, Marketing & Social Media Committee) The American Institute of Constructors | 19 Mantua Road | Mount Royal, NJ 08061 | Tel: 703.683.4999 | www.professionalconstructor.org — Page 3 — Fall 2019 | Volume 44 | Number 02 The Professional Constructor Journal of the American Institute of Constuctors AIC PAST PRESIDENTS 1971-74 Walter Nashert, Sr., FAIC 2009-11 Mark E. Giorgi, FAIC 1975 Francis R. Dugan, FAIC 2011-12 Andrew Wasiniak, FAIC, CPC 1976 William Lathrop, FAIC 2012-13 Tanya Matthews, FAIC, DBIA 1977 James A. Jackson, FAIC 2013-14 David Fleming, CPC, DBIA 1978 William M. Kuhne, FAIC 2014-15 Paul Mattingly, CPC 1979 E. Grant Hesser, FAIC 2015-16 Joe Rietman, CPC 1980 Clarke E. Redlinger, FAIC 2016-18 Greg Carender, CPC 1981 Robert D. Nabholz, FAIC 1982 Bruce C. Gilbert, FAIC 1983 Ralph. J. Hubert, FAIC 1984 Herbert L. McCaskill Jr., FAIC 1985 Albert L Culberson, FAIC 1986 Richard H. Frantz, FAIC 1987 L.A. (Jack) Kinnaman, FAIC 1988 Robert W. Dorsey, FAIC 1989 T.R. Benning Jr., FAIC 1990 O.L. Pfaffmann, FAIC 1991 David Wahl, FAIC 1992 Richard Kafonek, FAIC 1993 Roger Baldwin, FAIC 1994 Roger Liska, FAIC 1995 Allen Crowley, FAIC 1996 Martin R. Griek, AIC 1997 C.J. Tiesen, AIC 1998-99 Gary Thurston, AIC 2000 William R. Edwards, AIC 2001-02 James C. Redlinger, FAIC 2003-04 Stephen DeSalvo, FAIC 2005-06 David R. Mattson, FAIC 2007-09 Stephen P. Byrne, FAIC, CPC The American Institute of Constructors | 19 Mantua Road | Mount Royal, NJ 08061 | Tel: 703.683.4999 | www.professionalconstructor.org — Page 4 — Fall 2019 | Volume 44 | Number 02 The Professional Constructor Journal of the American Institute of Constuctors EDITOR Jason D. Lucas, Ph.D. Assistant Professor, Clemson University ARTICLES IN THIS ISSUE PAGE 6 Accuracy of Drone Based Surveys to Measure Stockpile Volume Joseph M. Burgett, Scott Shaffer, and Eric Stuckey PAGE 15 Effects of Organizational Trust and Project Delivery Variables on BIM User Confidence Jason D. Lucas and Saw Sri Neeharika Vijayarao PAGE 30 Building Information Model-Based Quantity Takeoff - Leadership Support and Training Morgan Tagg, James P. Smith, Jay P. Christofferson, and Kevin R. Miller PAGE 41 Attraction and Retention of Minority Managerial Employees at Electrical Contractors Ben F. Bigelow, Anthony J. Perrenoud, and Anusree Saseendran PAGE 52 Commercial Construction Schedule Collaborators and Current Scheduling Practices Evan D. Bingham, Jay P. Christofferson, and Mark Hutchings The Professional Constructor (ISSN 0146-7557) is the official publication of theAmerican Institute of Constructors (AIC), 19 Mantua Road, Mount Royal, NJ 08061. Telephone 703.683.4999, Fax 703.683.5480, www.professionalconstructor.org. This publication or any part thereof may not be reproduced in any form without written permission from AIC. AIC assumes no responsibility for statements or opinions advanced by the contributors to its publications. Views expressed by them or the editor do not represent the official position of the The American Professional Constructor, its staff, or the AIC. The Professional Constructor is a refereed journal. All papers must be written and submitted in accordance with AIC journal guidelines available from AIC. All papers are reviewed by at least three experts in the field. The American Institute of Constructors | 19 Mantua Road | Mount Royal, NJ 08061 | Tel: 703.683.4999 | www.professionalconstructor.org — Page 5 — Fall 2019 | Volume 44 | Number 02 Accuracy of Drone Based Surveys to Measure Stockpile Volume Accuracy of Drone Based Surveys to Measure Stockpile Volume Joseph M. Burgett, Clemson University | [email protected] Scott Shaffer, South Carolina Department of Transportation | [email protected] Eric Stuckey, South Carolina Department of Transportation | [email protected] ABSTRACT This paper outlines a two phase experiment evaluating the accuracy of volumetric calculations using a commercially available drone and structure-from-motion (SfM) software. In the first phase, a large cardboard pyramid with a known volume was used to simulate a stockpile. Using georeferenced images collected by a Phantom 4 Pro drone and the SfM software ContextCapture, the computed volumes ranged between 1.5% and 3.3% of the actual volume. In the second phase of the experiment, a photometric survey was created of a large SCDOT borrow pit. The volumetric calculations were computed using conventional survey practices and with drone collected images. There was a 9.8% difference between the two methods with the drone base model providing significantly higher model resolution and number of data points. Keywords: Drone, Survey, Stockpile, Volume Joe Burgett, PhD is an endowed associate professor at Clemson University’s Nieri Family Department of Construction Science and Management.