Deflection Limitation
Maximum allowable deflection is dictated by the bending limit of the finish material under the required design load (e.g., usually 5 psf for interior partitions).
Degree Days
The number of degrees that the mean temperature for any day at a particular locatoin is below 65 degrees Fahrenheit.
Dedicated circuit
An electrical circuit that serves only one appliance (i.e., dishwasher) or a series of electric heaters or smoke detectors.
Deformation
Change in shape of a body brought about by the application of a force internal or external. Internal forces may result from temperature, humidity or chemical changes. External forces from applied loads can also cause deformation.
Default
Breach of a mortgage contract (not making the required payments).
Decoupling
Separation of elements to reduce or eliminate the transfer of sound, heat or physical loads from one element to the other.
Deck, decked
To install the plywood or wafer board sheeting on the floor joists, rafters, or trusses.
Deflection
Displacement that occurs when a load is applied to a member or assembly. The dead load of the member or assembly itself causes some deflection as may occur in roofs or floors at mid-span. Under applied wind loads maximum deflection occurs at mid-height in partitions and walls.
Dehumidification
The removal of water vapor from the air.
Deed
A written instrument that is used to transfer real property from one party to another.
Delamination
The separation of the plies in a laminate or plies from a base material.
Density
(1) With regards to materials, a measurement that compares the amount of matter an object has relative to its volume.(2) In city or site planning, a measure of the number of people, families, etc. that occupy a specified area.
Delaminating
Separation of the plies in a panel due to failure of the adhesive. Usually caused by excessive moisture.
Dehydration
The removal of water vapor from any substance.
Dehumidifier
A cooling, absorption, or adsorption device used for removing moisture from the air.
Dew Point
The temperature at which air becomes saturated (100 percent relative humidity) with moisture and below which condensation occurs.
Design Load
Combination of weight (dead load) and other applied forces (live loads) for which a building or part of a building is designed. Based on the worst possible combination of loads.
Desiccation
The process of evaporating or removing water vapor from a material.
Desiccant
Any absorbent, adsorbent, liquid, or solid that removes water or water vapor from a material.
Dermal Absorption
A route of exposure by which substances enter the body through the skin. https://healthymaterialslab.org/tool-guides/hml-resources