Architectural and Engineering Glossary

M

Masking Tape

An adhesive backed paper tape used in masking, 

Mason

A person who is skilled in the craft of building with units of natural or artificial mineral products,such as bricks, stones,and cinderblocks,that are usually bonded or cemented with mortar to similar units.

Mason’s Ax

See axhammer.

Mason’s Hammer

A hammer with a heavy steel head,one face of which is shaped like a chisel for trimming brick or stone.

Mason’s Joint

Same as mason’s V-joint pointing.

Mason’s Lead

See lead, 1.

Mason’s Level

A level similar to a carpenter’s level but longer.

Mason’s Lime

See building lime.

Mason’s Mark

See banker mark.

Mason’s Measure

A measure of the quantity of masonry units required for a job;corners are counted twice,and no allowance is made for small openings.

Mason’s Miter, Mason’s Mitre

A masonry joint having the appearance of a miter joint but actually shaped from a single solid stone.

Mason’s Putty

A lime putty to which portland cement and stone dust have been added;esp.used in ashlar work.

Mason’s Scaffold

A totally self-supporting scaffold,having two rows of standards,capable of carrying unusually heavy loads.

Mason’s Stop

Same as mason’s miter.

Mason’s V-joint Pointing

Pointing in which the mortar is given a profile similar to a flattened V;may also have a flat fillet at top and bottom.

Masonite

A proprietary name for a widely used commercial hardboard.

Masonry

1.The art of shaping,arranging,and uniting stone,brick,building blocks,etc.,to form walls and other parts of a building. 2.Construction using masonry units of such materials as clay,shale,glass,gypsum,or stone,set in mortar; this term includes concrete masonry units but excludes reinforced concrete.

Masonry Panel

See prefabricated masonry panel.

Masonry Anchor

The metal piece inside the throat of a hollow metal doorframe which secures the frame to a masonry wall.

Masonry Block

Same as masonry unit.

Masonry Bond

See bond.

Masonry Cement Hydraulic Cement

for use in mortars for masonry construction where greater plasticity and water retention are desired than are obtainable by the use of portland cement alone;such a cement always contains one or more of the following materials:portland cement,portland-pozzolan cement,natural cement,slag cement,and hydraulic lime,and usually contains one or more of the following:hydrated lime,pulverized limestone,chalk,talc,pozzolan,clay,and gypsum;many masonry cements also include entrained air and a water repellent.
 

Masonry Course

A layer of masonry units running (essentially) horizontally in a wall.

Masonry Cramp

A U-shaped metal fastener used to hold adjacent units of masonry together.

Masonry Drill

Same as star drill.

Masonry Filler Unit

A masonry unit which is used to fill the space between joists or beams,providing a platform for a cast in place concrete slab.

Masonry Grout

Any cementitious mixture used to fill voids in masonry.

Masonry Guard

A plaster guard.

Masonry Joint

Any joint between masonry units bonded with mortar.See colonial joint,concave joint, excess joint, extruded joint, flat joint,flush cut joint, hick joint,hungry joint, keyed joint, raked joint,rodded joint, rough cut joint, ruled joint, scored joint,scribed joint,skintled joint, spalled joint,struck joint, tooled joint,troweled joint, V-joint,weather joint,weather struck joint.Also see pointing.

Masonry Mortar

See masonry cement and mortar.
 

Masonry Nail

A hardened steel nail with a knurled or fluted shank;esp.used for fastening to masonry.

Masonry Paint

A durable paint expressly designed to coat exterior masonry surfaces.Also see cement paint.

Masonry Reinforcement

See reinforcement. 

Masonry Tie

1.See wall tie.2.See tie, 1. 

Masonry Veneer

A masonry facing laid against a wall and not structurally bonded to the wall.

Masonry-bonded Hollow Wall

A wall built of masonry units so arranged as to provide an air space within the wall,and in which the facing and backing of the wall are bonded together with masonry units.

Masonwork

Same as masonry.

Mass Bell

Same as sanctus bell.

Mass Burning Rate

The loss of mass per unit by materials burning under specified conditions.

Mass Center

Same as center of gravity.

Mass Color

When viewed by reflected light,the color of a pigment vehicle mixture which is thick enough to completely obscure the back- ground.

Mass Concrete

Any volume of cast in place concrete intended to resist applied loads by virtue of its mass;generally cast as a monolithic structure;usually incorporates a high proportion of large coarse aggregate and a low cement content.

Mass Curing

The adiabatic curing of concrete in sealed containers.

Mass Diagram

A calculation employing a graph portraying the cumulative quantities of cut and fill along the center line (cutis shown as a positive quantity and fillis shown as a negative quantity);used to determine the haul.

Mass Retaining Wall

A gravity wall.

Massicot

A yellow amorphous powder,the crystalline form of which is litharge;used as a pigment.

Masstone

The undiluted color of a pigment or pigmented paint film.

Mast

1.A tower which carries one or more load lines.2.The load-bearing component of a derrick,or the like.

Mast Arm

A bracket attachment to a lamppost or pole from which a luminaire is suspended.

Mastaba

A freestanding tomb used in ancient Egypt,consisting of a rectangular superstructure with inclined sides,from which a shaft leads to underground burial and offering chambers.