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| High Workload (e.g., rooms in hospitals and in radiology and orthopedic offices) |
Moderate Workload (e.g., rooms in medical and chiropractic offices) |
Low Workload (e.g., rooms in podiatry and veterinary offices) |
||||
| Up to 1000 mA-min/week | Up to 250 mA-min/week | Up to 15 mA-min/week | ||||
| Lead (inches) |
Concrete (inches) |
Lead (inches) |
Concrete (inches) |
Lead (inches) |
Concrete (inches) |
|
| Operator Shields | 1/16 | 5 | 1/16 | 5 | 1/16 | 5 |
| Primary Beams | ||||||
| Walls and Floors | 3/32 - 1/8 | 6 - 8 | 1/16 - 1/8 | 4 - 6 | 1/16 | 4 |
| Secondary Radiation | ||||||
| Walls | 1/16 | 3 - 4 | 1/32 - 1/16 | 3 | 0 - 1/32 | 1 |
| Doors | 1/16 | ------- | 1/32 - 1/16 | ------- | 0 - 1/32 | ------- |
| Floors and Ceilings | 1/32 - 1/16 | 2.5 - 3.5 | 1/32 | 2.5 | 0 - 1/32 | 1 |
Updated: September 11, 2017
The above concrete thicknesses are based on the use of standard-density concrete with a density of 147 pounds per cubic foot.
Additional shielding design guidance