Classification System for Student Access Shops Revised September 18, 2015 Device Class 1 2 3 4 5 Power Low power hand / small bench tools Medium power tools Powerful portable and small Light industrial tools Large industrial tools (2 ‐ 4 amp @ 120 VAC, 18V or less (¼ to ½ hp) (< 10 amp @ 120 VAC, benchtop tools (typically benchtop, > ½ hp, (manual and CNC‐controlled) cordless) >18V and up to 24V cordless); (> ½ hp) (10‐15 amps @ 120 V AC, pneumatics, hydraulics) (some of these tools may be off‐limits to any specialized enclosed CNC‐computer 24V‐36V portable, pneumatics, student use) Highest hazard tools in bold tools hydraulics) Common Examples  Dremel tool  Jig saw  Circular saw  Small bandsaw  Full sized milling machine  Cordless drills 18V or less  3/8" hand drill  Belt sander  Small drill press  Full sized metal lathe  Palm sanders  Corded devices < 1/3 hp  Framing nailer  Small/benchtop milling machines  Radial arm saw  Soldering irons and guns  Cordless drills greater than 18V  ½ hp geared drill  Small/benchtop metal lathes  Large drill press  Heat guns and up to 24V  Reciprocating saw  Woodturning lathes  Large band saw  Hot melt glue guns  Benchtop and self‐standing  > 24V cordless tools  Belt/disc sander  Surface grinder  Sewing machines manual tools  Chop / miter saws  Horizontal saw  Large jointer/planer  Manual hand tools  Routers  Scroll saw  Shaper/moulder  Laser cutters / engravers  Mini‐lathe  Planer, jointer  Power shear  3d printers  Thermal foam cutters  Angle grinders  Panel saw  Printing presses (Vandercook)  Surface grinder  Bench grinder  Iron worker  SawStop‐style tablesaw only  Powered Platen Style Printing Presses Shop Access Control By permission of Shop Supervisor By permission of Shop Supervisor All student shops – ID Card All student shops – ID Card All student shops – ID Card and/or Monitor and/or Monitor

Tool Use Restrictions  Performed in shops or designated  Undergrads ‐ buddy system  Undergrads – monitored i  Undergrads – monitored i  Undergrads – only under and Oversight approved locations, i.e. theater  Grads – buddy system  Grads – buddy system professional supervisionii after extensive training  Grads – buddy system  Emergency self‐alert devices for low occupancy shops / times User Training  Introduction to shop safety and  Introduction to shop safety and  Basic shop safety orientation by  Basic shop safety orientation by  Basic shop safety orientation by individual tools by shop supervisor individual tools by shop shop supervisor / manager shop supervisor / manager shop supervisor / manager / manager supervisor / manager  Individual tool instruction  Individual tool instruction  Individual tool instruction  Directions in manual or on wall  Signed agreement regarding code  Demonstrate proficiency by  Hands‐on use training/ experience  Extended hands‐on training/ postings of conduct and list of tools performing certain operations to  Demonstrate proficiency by experience  Required to read operator manual approved for use specified accuracy performing certain operations to  Demonstrate proficiency by 1

Device Class 1 2 3 4 5 Power Low power hand / small bench tools Medium power tools Powerful portable and small Light industrial tools Large industrial tools (2 ‐ 4 amp @ 120 VAC, 18V or less (¼ to ½ hp) (< 10 amp @ 120 VAC, benchtop tools (typically benchtop, > ½ hp, (manual and CNC‐controlled) cordless) >18V and up to 24V cordless); (> ½ hp) (10‐15 amps @ 120 V AC, pneumatics, hydraulics) (some of these tools may be off‐limits to any specialized enclosed CNC‐computer 24V‐36V portable, pneumatics, student use) Highest hazard tools in bold tools hydraulics)  Signed agreement regarding code specified accuracy performing certain operations to of conduct and list of tools  Signed agreement regarding code specified accuracy approved for use of conduct and list of tools  Signed agreement regarding code of approved for use conduct and list of tools approved for use Monitor / Supervisor  Tool experience  Tool experience  Tool experience  Extensive tool experience‐  Professional‐level experience‐ Training  Yale EHS shop safety training class documented documented for monitors and supervisors  Yale EHS shop safety training class  Yale EHS shop safety training class  First aid for monitors and supervisors for monitors and supervisors  First aid  First aid Emergency Shut‐Offs Room‐level emergency shut‐offs for electrical power to Class 5 tools Tool Access Controls Locked cabinet Locked cabinet Locked cabinet Tool power lockout (for tiered access Tool power lockout (for tiered access (Tool key / code lockout for 3d (Tool key / code lockout for laser shops) shops) printers) or thermal foam cutters) Remote Monitoring As desired As desired (Cameras in shop) (Cameras in shop) (Cameras in shop) (Future Enhancement)

i “Monitors” are experienced graduate students or higher with full authority over shop use and control who have been recommended by the Shop Supervisor and completed required safety training. ii “Supervisors” are staff or faculty with professional‐level training and experience in applicable tool set‐up, use, and maintenance

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