Notes on Sustainable Urban Design and Development: Technologies for Sustainable Building

Economic Role:
- Contribution: Construction accounts for 13% of the world's GDP.
- Spending: Accounts for $1.6 trillion.
- Productivity Growth: The sector's annual productivity growth has increased by only 1% over the last 20 years.
- Infrastructure Need: Higher productivity could potentially create an additional value of $1 trillion, meeting half of the world's infrastructure need.
Performance across Sectors:
- Construction is divided into specialized trades which adversely affects overall productivity.
- Various subsectors and their productivity indexed with reference to the total sector (index = 100, 2013):
  - Total Construction: 100
  - Building: 119
  - Civil: 124
  - Industrial: 104
  - Specialized: 79

Fragmentation and Specialisation:
- Specialised roles can lead to inefficiencies due to coordination issues.

Analysis of construction’s contribution to GDP growth in major Australian cities during 2017-18:
- Sydney: Construction among top three industries contributing alongside financial and insurance services.
- Melbourne: Different sectors dominate GDP growth, e.g., healthcare and social assistance.
- Brisbane: Notable contributions from construction and professional services.
- Smaller cities like Adelaide and Canberra show varied contributions across different sectors.

Increased Productivity:
- Enhancements in asset utilization and innovation in products and services.
- Results in cost savings and improved output.
- Intangible Benefits: Increase in efficiency, reduced risk, improved compliance, and enhanced resilience of the workforce.
Growth Across the Australian Economy:
- Improved asset lifecycle impacts productivity gains beyond construction alone, supporting wider economic growth.
- Categories driving improvement include household consumption, investment, and net exports leading to wage increases.
Wider Social Value:
- The use of information management enhances construction and operations, yielding private benefits such as quality, sustainability, and reduced construction blight.
- Environmental benefits include lowered air pollution and enhanced visual amenity.

Current Digitalisation in Construction:
- Submission of different digital formats for project management analytics (e.g., 3D CAD files, BIM, PDF conversions) shows a trend towards increasing digital capability.

Overview of perceptions on adoption of future construction technologies, including usage prospects of:
- BIM: Integrated tools for construction management.
- 3D Printing: Potential impact on construction efficiencies.
- Drones and Robotics: Expected to automate design, enhance project tracking, and reduce labor costs.

Definition: BIM involves an information modeling technology combined with a set of processes to generate and communicate an integrated project data set.
Benefits of BIM:
- Enhances collaboration, reduces errors and project delays.
- Automation trends lead to improved speed and accuracy.
Statistical Impact on Project Duration:
- Projects utilizing BIM have shown to be 27% shorter in duration compared to traditional methods in 2009, with improvements to 37% shorter in 2012.
- Results in a 40% reduction in unbudgeted changes during construction, leading to significant cost savings (10% value savings).

BIM's use spans all project life cycle phases:
- Initial design, construction, and ongoing operations and maintenance.

Discussion about the adoption of GPS technology and its potential impact on operational efficiency and safety in construction.

Emerging Technologies:
- 3D laser scanning is revolutionizing project tracking through precise measurements and real-time assessments.

Adoption of devices like Google Glass and smartwatches on construction sites to monitor worker conditions and facilitate communications.

Prefabrication techniques promote eco-friendly practices by minimizing onsite waste and reducing pollution.
Case Study Example: Miami Valley Hospital’s Heart and Orthopedic Center successfully implemented prefabrication for enhanced project efficiency and reduced onsite labor.
Prefabrication advantages observed:
- Increased speed (up to three times faster) than conventional methods.
- Improved installation rates (e.g., plumbers achieving 600 feet of pipe installed per day, a 300% increase in productivity).

Technologies predicted to shape the future construction sector include:
- Drones: Expected to evolve to reduce the need for human intervention in tasks.
- Robotics: From simple assembly tasks to managing complex inspections and repairs.
- Living Concrete that Heals Itself: Introduces biological components to enhance durability and sustainability in concrete applications.