Ceilings

Gypsum board ceilings sealed with epoxy paint are adequate for relatively dry areas of the facility, including rodent rooms, but are generally not suitable for high-moisture areas like cage sanitation. A

Figure 8.14 Given a large area, dogs and pigs may be held together. Outdoor pens such as the one shown here stimulate the animals to exercise and to engage in social interactions.

Figure 8.15 A corridor in an animal facility showing extruded solid aluminum bumper guardrails at two levels to protect the walls and the door. If only one guardrail is to be used, the lower one may provide the most protection from the widest variety of mobile equipment. Note that the rail extends further out from the wall in one location to protect wall-mounted equipment that protrudes further from the wall than the typical rail mounting of 3 in from the wall.

Figure 8.15 A corridor in an animal facility showing extruded solid aluminum bumper guardrails at two levels to protect the walls and the door. If only one guardrail is to be used, the lower one may provide the most protection from the widest variety of mobile equipment. Note that the rail extends further out from the wall in one location to protect wall-mounted equipment that protrudes further from the wall than the typical rail mounting of 3 in from the wall.

drop ceiling with lay-in panels is generally not recommended for animal housing rooms, because they impede sanitation and vermin control. However, in recent years, composite panels made of lightweight water-impervious materials and sealed to fiberglass "T" bars with gaskets and clamps have proved to be a satisfactory, virtually maintenance-free choice for ceilings. These are particularly cost-effective for

Figure 8.16 An individually ventilated microisolation cage rack with the cage exhaust filter and fan unit connected directly to the room exhaust at the ceiling, which minimizes odors in the room. The supply and exhaust fan and filter units are situated on the top of the rack. Note the extruded aluminum rail protecting the wall at the left side of the photo.

Figure 8.16 An individually ventilated microisolation cage rack with the cage exhaust filter and fan unit connected directly to the room exhaust at the ceiling, which minimizes odors in the room. The supply and exhaust fan and filter units are situated on the top of the rack. Note the extruded aluminum rail protecting the wall at the left side of the photo.

use in high-moisture areas such as cage sanitation and animal rooms with hose-down type animal housing systems. In all cases, the ceiling to wall junction should be sealed. The minimal recommended ceiling height is 2.7 m (9 ft) and may need to be higher in rodent and nonhuman primate rooms, depending on the height of rodent racks or nonhuman primate cages to be used.

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