Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial › Section 51-11C-20213 - Section C202.13-M

Current through Register Vol. 24-14, July 15, 2024
MANUAL.
Capable of being operated by personal
				intervention (see "Automatic").
MASS TRANSFER DECK SLAB.
A concrete slab designed
				to transfer structural load from the building perimeter wall or column line
				above, laterally to an offset wall or column line below, and which has
				conditioned or semiheated space on the inside of the upper wall and exterior or
				unconditioned space on the outside of the upper wall. The area of the slab edge
				shall be defined as the thickness of the slab multiplied by the length of the
				edge condition. Examples of this condition include, but are not limited to, the
				transition from an above-grade structure to a below-grade structure or the
				transition from a tower to a podium. A cantilevered concrete balcony does not
				constitute a mass transfer deck slab.
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MECHANICAL COOLING.
Reducing the temperature of a
				gas or liquid by using vapor compression, absorption, desiccant
				dehumidification combined with evaporative cooling, or another energy-driven
				thermodynamic cycle. Indirect or direct evaporative cooling alone is not
				considered mechanical cooling.
MECHANICAL HEATING.
Raising the temperature of a
				gas or liquid by use of fossil fuel burners, electric resistance heaters, heat
				pumps, or other systems that require energy to operate.
MECHANICAL LOAD COEFFICIENT (MLC).
In a
data center
, the ratio of the cooling system's net use of
				energy to that of the
ITE
. The annual MLC is calculated using
				hourly weather data for the data center's location and equals the sum of all
				energy flowing into the cooling system to respond to that weather, minus any
				energy successfully recovered to avoid any new energy use, all divided by the
				energy flowing into the
ITE
during the same period.
MECHANICAL ROOM.
A room or space in which
				mechanical equipment and appliances are located that has sufficient room for
				access and maintenance of the equipment or appliances with room energy doors
				closed.
METAL BUILDING ROOF.
A roof that:
1. Is constructed with a metal, structural,
			 weathering surface;
2. Has no
			 ventilated cavity; and
3. Has the
			 insulation entirely below deck (i.e., does not include composite concrete and
			 metal deck construction nor a roof framing system that is separated from the
			 superstructure by a wood substrate) and whose structure consists of one or more
			 of the following configurations:
a. Metal
			 roofing in direct contact with the steel framing members;
b. Metal roofing separated from the steel
			 framing members by insulation;
c.
			 Insulated metal roofing panels installed as described in a or b.
METAL BUILDING WALL.
A
wall
whose
				structure consists of metal spanning members supported by steel structural
				members (i.e., does not include spandrel glass or metal panels in curtain
wall systems
.
METER.
A device that measures the flow of
				energy.
MICROCELL.
A wireless communication facility
				consisting of an antenna that is either:
(a) Four (4) feet in height and with an area
			 of not more than 580 square inches; or
(b) if a tubular antenna, no more than four
			 (4) inches in diameter and no more than six (6) feet in length; and the
			 associated equipment cabinet that is six (6) feet or less in height and no more
			 than 48 square feet in floor area.