(See Bond Beam Block under CONCRETE MASONRY UNIT.)ĬELL (Core) - The molded open space in a concrete masonry unit.ĬHASE - A continuous recess built into a wall to receive pipes, ducts, etc.ĬLEANOUT - An opening at the bottom of a grout space of sufficient size and spacing to allow the removal of debris.ĬMACN - Concrete Masonry Association of California and Nevada.ĬOLLAR JOINT - The vertical longitudinal joint between wythes of masonry.ĬOMPOSITE MASONRY - Multiwythe masonry members acting together as a single member in resisting loads.ĬOMPRESSIVE STRENGTH - The maximum load required to fracture the masonry unit by applying a compressive force to the upper and lower surface of the unit. Also called plumb joint bond, straight stack, jack bond, jack on jack, and checker board bond.īOND BEAM - One or more courses of masonry units poured solid and reinforced with longitudinal reinforcing bars. All head joints form a continuous vertical line. Stack Bond - A bonding pattern where no unit overlaps either the one above or below. Placing vertical mortar joints centered over the unit below is called center bond, or half bond, while lapping 1/3 or 1/4 is called third or quarter bond.
Running Bond - Lapping of units in successive courses so that the vertical head joints lap. Includes quarter bond, third bond and half or common bond.
Mechanical Bond - Units laid so that they lap over each other in successive courses. Net area is the actual surface area of a cross-section of masonry.Īdhesion Bond - The adhesion between masonry units and mortar or grout.
Net Area - The gross cross-sectional area at any plane minus the area of ungrouted cores, notches, cells, unbedded areas, etc. Gross Area - The total cross-sectional area of any plane encompassed by the outer periphery of any specified section.
ADMIXTURES - Materials added to cement, aggregate and water such as water repellents, air-entraining or plasticizing aids, pigments, or aids to retard or speed up setting.ĪGGREGATES - Inert particles such as sand, gravel, and rock, which when bound together with cement and water, form concrete.ĪNCHOR TIES - Any type of fastener used to secure masonry veneer to a support backing, such as another wall, usually for tension value.ĪSTM - American Society for Testing and Materials.īedded Area - The area of the surface of a masonry unit which is in contact with mortar in the plane of the joint.
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