What is “Constructability”? The extent to which a design of a facility provides for ease of construction yet meets the overall requirements of that facility
Brehm’s Definition of “Constructability” “Doing for fifty cents what any damn fool can do for a dollar”
CHALLENGE Getting the designers and constructors from diverse cultural backgrounds and different goals to work together effectively
ALL ABOUT ATTITUDE! It is an attitude that must prevail through: • Conceptual planning • Design and procurement • Field operations
Direct Benefits • Construction planning is made easier • Both design and construction costs can be reduced • The construction schedule may be shortened • Better quality can be required and expected • Earlier owner occupation
Indirect Benefits • Building a collaborative team committed to project goals • Cross discipline training • Transfer of expertise from other projects • Constructors better understand design intent, and vice versa • Increased innovation in both design and construction • Competitive advantage
General Constructability Checklist • Provide work areas when practical • Verify utility locations • Assure utility construction coordination with other Agencies • Are pay items in the bid tabulation covered by the specs? • Is all of the required work covered by pay items?
General Constructability Checklist • Provide access to work areas • Consider access for routine maintenance in design • Consider construction methods that “drive” the design • Is weather a factor? • Are materials available?
General Constructability Checklist • Keep design simple and flexible • Standardize design elements • Do specifications allow work efficiency? • Are specifications clear, and conform with current practices? • Check local Agency requirements for environmental issues.
General Constructability Checklist • Which material is more economical? • Consider material type available during staged construction. • Can access be constructed to remote locations? • Minimize restricted areas that eliminate normal equipment use • Minimize low production or hand work areas
General Constructability Checklist • Do Special Provisions fit the job? • Strive for simplicity in design • Minimize architectural details • Consider working areas needs around structures • Check for overhead utility conflicts
General Constructability Checklist • Consider access to structure site • Can traffic conflicts be reduced? • Are work zones large enough for equipment access? • Can emergency vehicles travel thru without delays?