2. LASER Facts:  Light Amplification by Stimulated Emission of Radiation  Introduced to construction in 1968. The first model cost between $7,000 and $8,000!  Don’t look into the beam! ○ Can burn your retina

3. TODAY  Split into four groups and rotate through stations.  This will be hands on. Expect to move around and participate.  We will be using the following 4 lasers today:

4. Pipe Laser  “Set pipe” with Travis  Location: Hallway outside surveying lab.

5. Pipe Laser  Common uses: ○ Providing control for grade, elevation and line ○ Installation of gravity flow pipes ○ Tunnel boring  Range: 650ft  Problems: Beam can deflect due to temperature differences. ○ Solution? Use fan to equalize air temp in pipe

6. Electronic Level and Lenker Rod  “Find elevations” with Andrew  Location: The classroom

7. Electronic Level  Common uses: Checking elevations, setting forms, slope on grades  Operating range: 500m or 1600ft  Accuracy: +/- 1/16” at 100ft

8. Utility Laser  “Install drop ceiling” with Craig  Location: Soils lab

9. Utility Laser  Multifunctional  Self-leveling  Can be mounted for horizontal and vertical applications  Accuracy: ○ Horizontal 1.2mm @ 30m ○ Vertical 2.2mm @ 30m  Operating range: 200m

10. Plumb pointer  “Check for plumb” with Jacob  Location: South Stairwell

11. Plumb Pointer  Common uses: ○ Horizontal and vertical alignment ○ Wall layout ○ Plumb bob  Easy to use  One of the first lasers used in construction

12. The End!  Make sure to ask any questions and try them out for yourselves!  Speak up about the ways you have seen lasers used on job sites.  Questions?