Architectural and Engineering Glossary

M

Mud Room

A small entry area in a house where muddy footwear and wet outer clothing may be removed and stored temporarily.

Mud Slab

A layer of concrete,2 in. (5 cm) to 6 in.(15 cm) thick,below a structural concrete floor or footing over soft,wet soil.

Mud Wall

A wall usually constructed of a mixture of clay and a binder such as chopped straw;often,gravel is added.

Mud-and-sticks Chimney

Same as clay and sticks chimney.

Mud-capping

The blasting of a boulder by placing a quantity of explosives against it with out confining the explosives in a drill hole.

Mud-jacking

A process of raising a concrete slab on ground where it has settled or been depressed;a hole is drilled through the slab,then a mixture of mud and cement is pumped beneath the slab under pressure,thereby raising it.

Mudejar Architecture

A Spanish style created by Moors under Christian domination in the 13th and 14th cent.but retaining Islamic elements such as the horseshoe arch.

Muff Glass

Window glass,made by a now obsolete technique.A glass cylinder was blown;but before it cooled,it was sliced lengthwise and unrolled into a flat piece from which the panes were cut.

Muffle

1.A material used to build up the core of a large plaster molding.2.To deaden sound.

Muffler

See sound attenuator.

Mughal Architecture

See Mogul architecture.

Mulch

Material such as leaves,hay,straw,or the like,spread over the surface of the ground to protect the roots of newly planted shrubs or trees,of tender plants,etc.from the sun or from the cold.

Mullion

A vertical member separating (and often supporting) windows,doors,or panels set in series.Also see door mullion.

Mullion Cover

A loose piece of metal trim which screws or snaps in place on the interior side of the mullion of a window.

MULT

On drawings,abbr.for “multiple.”

Multi-blade Damper

A damper,through which the quantity of airflow is controlled by means of a number of blades linked together mechanically.

Multi-element Prestressing

Prestressing of reinforced concrete which is accomplished by stressing an assembly of several individual structural elements to produce one integrated structural member.

Multi-outlet Assembly

A metallic or non metallic assembly used in electric wiring;a type of surface mounted or flush raceway designed to hold conductors and attachment plug receptacles;assembled in the field or at the factory.

Multibag Packer

See carousel packer and linear packer.

Multicentered Arch

An arch having a shape composed of a series of circular arcs with different radii,giving an approximation to an ellipse.These arcs are symmetrically disposed about a vertical axis and occur in odd numbers.

Multicolor Finish

A speckled paint finish containing small individual colored particles.

Multicolored Brick

See rustic brick.

Multiconductor Cable

An assemblage of several electrical conductors having a common outer jacket.

Multicurved Gable

A gable having an outline containing two or more curves on each side of a central ridge;for example,see Flemish gable.

Multicurved Parapet

At the edge of a roof,a freestanding wall whose outline contains several curves on its upper surface,as in a mission parapet.

Multifamily Dwelling

A residential building containing more than two dwelling units.

Multifoil

Having more than five foils,lobes,or arcuate divisions.

Multifolding Door

A door composed of large panels hung on a ceiling track;when the door is open,the panels stack against each other and are housed in a relatively small space.

Multifuel Burner

A burner which can be fed by more than one type of fuel,used either separately or simultaneously.

Multimedia Filter

In a water supply system,a bed type filter containing several different filtration media (e.g.,coal,sand,and garnet).

Multiple Dwelling

A building for residential use which houses several separate family units,usually three or more.

Multiple Echo

See flutter echo.

Multiple Folding Rule

A folding rule up to 8 ft long used where precision accuracy is not required. 

Multiple Frame

A framework of beams and columns extending over more than one bay in a horizontal direction.
 

Multiple Glazing

Glazing comprised of more two or more sheets of glass with space between them,e.g.,see double glazing.

Multiple Hoistway

A hoistway for more than a single elevator or dumbwaiter.

Multiple-family

Said of a building in which more than two families or households live independently of each other and do cooking within their own living quarters.
 

Multivallate

A fort on a hill that is protected by three or more concentric ditches and embankments.

Multizone System

An air-conditioning system which is capable of handling several individually controlled zones simultaneously.