Masonry NC II key terms

The required gear worn to reduce injury risk on site, such as hard hat, safety boots, gloves, eye protection, and dust mask. It is the last line of defense after hazards are controlled.

The process of spotting conditions or acts that could cause harm before work starts, then reporting and controlling them. On masonry sites it covers falls, falling objects, sharp edges, and electrical risks.

A short briefing held before work begins where the crew reviews today's tasks, hazards, controls, and assignments. It records attendance and gives workers a chance to raise concerns.

A written breakdown of a task into steps, with the hazards of each step and the control measures required. It is prepared before work and reviewed with the crew.

Keeping the work area clean and orderly by clearing debris, stacking materials safely, and keeping walkways open. Good housekeeping prevents slips, trips, and material damage.

Separating construction waste into correct streams such as masonry rubble, timber, metal, and general refuse. It supports recycling and keeps disposal legal and orderly.

Measures that limit exposure to respirable crystalline silica when cutting, grinding, or drilling masonry, such as wet cutting, dust extraction, and respirators. Silica dust can cause serious lung disease.

Systems and practices that prevent workers from falling from heights, including guardrails, scaffolds, harnesses, and safe work platforms. It is required when working above specified height limits.

A temporary elevated platform that gives masons safe access to work at height. It must be erected, inspected, and tagged by competent persons before use.

A document supplied with a chemical product that lists its hazards, safe handling, first aid, and storage requirements. Workers must be able to access it for products such as cement and admixtures.

A power tool with an abrasive or diamond blade used to cut brick, block, and stone to size. It requires water or dust extraction and guarding for safe operation.

The mason's main hand tool, a flat steel blade with a handle used to pick up, place, and spread mortar and to tap units into line. Blade shape and handle balance affect control.

A flat board on which mortar is placed for the mason to pick up with the trowel. It keeps mortar contained and within reach on the scaffold.

A tool with vials that shows whether a surface is horizontal or vertical. Masons use it to check courses, plumb, and level as work proceeds.

A straight edge fitted with a level vial or used with a plumb line to check that a wall face is truly vertical. It is held against the work to detect lean.

A shaped metal or plastic tool used to finish and compact mortar joints to the required profile. Proper jointing improves weather resistance and appearance.

A manufactured or natural building block such as brick, concrete hollow block, or stone, laid with mortar to form walls. Units are specified by type, size, and strength.

A hollow-core concrete masonry unit widely used for walls. Its voids may be grouted and reinforced, and its nominal size is usually stated in millimeters.

An organized pile of materials stored safely and correctly. Cement is kept off the ground and dry, and masonry units are stacked to avoid damage and collapse.

A detailed drawing that gives the dimensions, materials, and construction information needed to build a specific part of the work. It guides layout and setting out on site.

The ratio between a drawing measurement and the real dimension it represents, such as 1:50. Reading the scale correctly is essential before measuring from a plan.

A line on a drawing that shows the extent and value of a measurement, usually with arrowheads and a number. It tells the mason the exact size to build.

The written requirements for materials, workmanship, and testing on a project. It complements the drawings and states what quality is acceptable.

A list of the quantities and types of materials needed for the work, used for ordering and estimating. It helps ensure the right units and mortar components are on site.

The process of measuring from drawings to calculate quantities of units, mortar, and reinforcement required. Accurate take-off reduces waste and shortages.

Marking the building's position, lines, and levels on the ground before construction begins. It establishes reference lines that control all later masonry work.

Wooden frames set outside the building corners with strings stretched between them to mark wall lines and levels. They allow the setting-out lines to be recovered after excavation.

A fixed reference line or level from which heights and positions are measured throughout the project. It must be clearly marked and protected from disturbance.

A setting-out technique that uses a triangle with sides in the ratio 3:4:5 to establish a right angle. It ensures walls meet square at corners.

A continuous horizontal layer of masonry units laid in mortar. Courses are kept level and to a consistent height to control the wall's overall dimensions.

A mixture of cement, sand, and water, sometimes with lime or admixture, used to bed and bond masonry units. It must be workable when placed and harden to hold the units together.

The stated proportion of cement to sand, such as 1:3 or 1:4, that determines mortar strength and workability. It is specified for each application and must be followed.

How easily mortar can be spread, placed, and adjusted with the trowel while staying cohesive. It depends on water content, sand grading, and mix proportions.

The horizontal layer of mortar on which a masonry unit is laid. Its thickness and uniformity affect level, strength, and the finished appearance.

The vertical mortar joint between the ends of adjacent masonry units in the same course. It must be filled fully for strength and weather tightness.

The layer of hardened mortar between masonry units, either horizontal or vertical. Joint thickness and profile influence structural performance and water resistance.

The arrangement of masonry units so that vertical joints in one course do not align with those in the course above. Good bond distributes load and prevents continuous cracks.

A bond in which each course consists of stretchers, with vertical joints offset by half a unit from the course below. It is common in single-leaf walls.

Steel bars or mesh placed in mortar or grout to strengthen masonry and control cracking. It must be positioned as shown on drawings with adequate cover.

A fluid cementitious mixture poured into block cores or cavities to fill them and encase reinforcement. It must be placed and consolidated without voids.

The means by which masonry, reinforcement, or fixtures are fixed securely to the structure. It includes embedded bars, ties, bolts, and approved fasteners.

Filling and finishing the exposed face of mortar joints after the wall is built. It improves appearance and weather resistance when done with the correct mortar and profile.

Keeping newly placed mortar or concrete moist and protected for a period so it gains strength and durability. It prevents premature drying and surface cracking.

Planned checks and tests that confirm materials and workmanship meet the specification, such as verifying mix ratios, dimensions, plumb, and level. Results are recorded for acceptance.

The condition of being exactly vertical. Masons check plumb frequently so walls do not lean and so doors, frames, and finishes fit correctly.

A white powdery deposit on masonry caused by soluble salts migrating to the surface and crystallizing as moisture evaporates. It is usually removed by dry brushing and controlled by good detailing.

Removing deteriorated mortar from joints to a set depth and refilling with new mortar. It restores weather resistance and appearance to an aging wall.

Recording the width, length, and movement of cracks over time to judge whether a defect is active or stable. It informs whether repair or structural investigation is needed.