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Concrete Quiz 3
Common Masonry Terms
22
Other
Undergraduate 2
04/07/2008

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Term
Lintel
Definition
Horizontal structural unit (beam) over an opening; support member over a door or window opening
Term
Wythe
Definition
Vertical wall or tier of masonry units one-unit thick
Term
Flashing
Definition
Sheet metal or plastic used at breaks in a building where water might leak in. Is run under the building material to create a barrier.
Term
Weep Holes
Definition
Openings in masonry joints left out atthe base of a masonry wall so moisture may run out.
Term
Cavity Wall
Definition
A two wythe wall; they are seperated by an air space and connected with joints. 2" air space where insulation could be placed.
Term
Course
Definition
A layer of brick
Term
Header
Definition
unit laid flat on its bed surface with end facing out.
Term
Bed joint
Definition
Horizontal mortar bed on which masonry unit is laid
Term
Head joint
Definition
vertical mortar joint
Term
Soldier Course
Definition
unit is laid vertically with header in the morter
Term
Efflorescence
Definition
Powder or stain that forms on mortar or concrete, caused by moisture leaching out salts from the material in the masonry
Term
Ties
Definition
metal fastener that is laid in the joint of the two wythes.
Term
Ties
Definition
metal fastener that is laid in the joint of the two wythes.
Term
Modular Brick
Definition
four inch module size or a multiple of four inches
Term
ladder and truss reinforcing
Definition
metal rods welded together in the appropriate pattern and laid in the mortar joint between wythes
Term
Trig
Definition
device used for supporting a line at the center of a wall
Term
Lead
Definition
Built up masonry corner used as a guide in laying a wall
Term
Story pole
Definition
pole marked with key masonry heights that is used as a guide when laying corners
Term
Corbel
Definition
Shelf or ledge built out from the face of a masonry wall
Term
Row Lock
Definition
Masonry units laid on edge with end facing out
Term
Keystone
Definition
Center brick or stone in an arch
Term
Absorbtion
Definition
amount of water a mosonry unit will absor b when completely submerged in either cold or boiling water
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