Subfloor damper and spill container

A device attachable to a suspended floor member (i) for collecting materials which fall through grid openings in the floor member and (ii) for controlling the rate of air-flow through the grid openings in an adjustable manner, said device comprising:

• 1.1 a spill container approximately dimensioned to be positioned under the grid openings of the floor member with a collecting area of sufficient breadth and configuration to collect and retain all liquids and particulate materials passing through the grid openings into the volume of the container;
• 1.2 support means for positioning the spill container in a coordinated position with respect to the grid openings under the floor member, said coordinated position providing (i) a venting path for permitting air flow past the spill container from above the floor member, and (ii) means for collecting and retaining all liquid and particulate matter falling through the grid openings;
• and
• 1.3 adjustable control means coupled to the spill container for regulating the rate of air flow passing through the venting path to thereby control the rate of air flow through the floor member.