Red Seal CCW key terms

A documented process of identifying site hazards, judging how likely and how severe each harm could be, and recording the controls chosen before work starts. It is reviewed whenever conditions change.

The ranked order for reducing risk: eliminate the hazard, substitute something safer, engineer a fix, apply administrative rules, then use personal protective equipment as the last layer. Higher-ranked controls are preferred because they protect everyone without relying on behaviour.

A procedure that isolates energy sources such as electricity, hydraulics, or stored pressure, applies a personal lock and tag, and proves the equipment is de-energized before anyone works on it. Only the person who applied a lock removes it.

Entering an enclosed or partially enclosed space with restricted access that is not built for continuous occupancy and may hold hazardous atmosphere. It requires a hazard assessment, atmospheric testing, a written entry plan, a standby attendant, and rescue arrangements.

Wearable gear such as hard hat, safety boots, eye protection, gloves, hearing protection, and fall arrest harness that shields the worker from a specific remaining hazard. It is selected to fit the task and inspected before each use.

A system of guardrails, covers, travel restraint, or fall arrest equipment that prevents a worker from falling or stops a fall safely. It is required at heights set by the local regulation and must include rescue planning.

A stocked container of absorbents, booms, gloves, bags, and disposal labels kept near fueling or chemical storage areas so a small release can be contained and cleaned quickly. Contents are checked and replenished regularly.

A site document listing sensitive features, regulated work limits, and the measures used to prevent pollution of soil, water, and air. It assigns responsibilities and describes monitoring, reporting, and cleanup steps.

A temporary barrier of geotextile fabric stretched on posts and buried at the base, placed along the downslope edge of disturbed ground to slow runoff and trap sediment before it leaves the site.

A manufactured mat of straw, wood fibre, or synthetic mesh rolled out and anchored over bare slopes or seeded areas to hold soil in place and protect new growth until vegetation establishes.

A fixed point of known elevation or coordinates, often a brass pin or stable structure, used as the reference for levelling and layout. It is protected from disturbance and checked before use.

A stable point of assumed or transferred elevation set up near the work area so instruments can be re-set during the day. It is marked clearly and tied back to the permanent bench mark.

A survey method that finds the height difference between points by taking backsight and foresight readings on a level instrument and adding or subtracting them from a known elevation.

A line set a measured distance away from and parallel to a building line or property line so stakes and string remain clear of excavation and traffic while still locating the true line.

A horizontal board fixed to stakes outside an excavation, with the building line and grade marked on it, so string lines can be stretched to guide digging and formwork placement.

The process of judging excavated ground by strength and stability, such as hard clay, compact sand, or running silt, to choose a safe side slope or shoring system. It is done by a competent person.

A temporary support system of posts, walers, and sheeting that holds the walls of an excavation or trench in place to protect workers from collapse and falling material.

A prefabricated steel or aluminium shield with two side walls and spreaders that workers stand inside while a trench is open. It is lowered by a hoist and does not replace sloping above the box.

The required distance that excavated material, tools, and equipment are kept back from the edge of an excavation so the added load and vibration do not trigger a wall collapse.

The temporary mould of panels, plywood, and framing that holds fresh concrete at the required shape and position until it hardens enough to carry its own weight.

The temporary structural support of posts, beams, and bracing that carries formwork and fresh concrete loads down to firm ground until the concrete can support itself.

A coating applied to the inside face of formwork so hardened concrete separates cleanly without damaging the surface or the panel. It is applied thinly and kept off reinforcing steel.

The point at which formwork or falsework may be safely removed, based on concrete strength gain, cure records, and the engineer's direction rather than a fixed number of days alone.

A taut cord stretched between two fixed points to give a straight reference for laying brick, setting forms, or aligning walls. It is checked for level and plumb as work proceeds.

One horizontal layer of masonry units in a wall. Courses are kept level and of even height so the wall stays true and the bond pattern is maintained.

The layer of mortar between masonry units that bonds them together and accommodates small differences in size. Its thickness and tooling affect both strength and water resistance.

A thin water-resistant material, often metal or flexible membrane, installed at joints, sills, and roof intersections to direct water out of the wall assembly instead of into it.

A small open gap left in a mortar joint just above flashing so water that collects inside a cavity wall can drain to the outside.

A wall that carries weight from floors or roof above down to the foundation. Removing or altering it without engineered temporary support can cause structural collapse.

A horizontal structural member placed over an opening in a wall to carry the load above and transfer it to the sides of the opening.

Posts, beams, or shoring installed to carry structural loads while a wall, floor, or frame is altered or removed, kept in place until permanent support is complete.

A flexible lifting assembly of chain, wire rope, or synthetic webbing that connects a load to a hook. Its capacity depends on configuration and is reduced by sharp edges and choke angles.

The angle between a sling leg and the horizontal, which controls how much tension the leg carries. As the angle flattens, tension rises sharply and can exceed the sling's rated capacity.

The manufacturer's table or graph giving the safe capacity of a crane or hoist for a given radius, boom length, and configuration. It is consulted before every lift and never estimated from memory.

A light rope tied to a load so a worker standing clear can control rotation and swing during a hoist without touching the load itself.

A check of a tool or piece of equipment for damage, missing guards, or defects performed before each use, with faulty items tagged out of service and reported.

A physical cover or barrier fitted over a moving part such as a blade, belt, or gear to prevent contact with the body. It is never removed while the equipment is running.

A pre-demolition or renovation investigation that identifies hazardous materials present in a building, such as asbestos, lead, or silica-containing products, so they can be removed or controlled before disturbance.

The controlled removal, enclosure, or encapsulation of a hazardous material by trained workers using regulated procedures, containment, and waste handling before renovation or demolition proceeds.

A written sequence describing how a structure will be taken down, including the order of removal, temporary support, exclusion zones, utility disconnection, and waste routing.

A written direction from the owner's representative or consultant to the contractor about a change, defect, or site condition. It is logged and answered promptly because it can affect cost and schedule.

A formal written question sent to the designer when drawings or specifications are unclear, missing, or conflicting, so the answer is recorded and issued to everyone affected.

A marked-up record drawing showing the dimensions, locations, and changes actually built, including buried services and deviations, handed over at completion for future maintenance and reference.

A dated site record of weather, labour and equipment on site, work completed, deliveries, visitors, incidents, and verbal instructions, kept as contemporaneous evidence if disputes arise.

A person who, by training, experience, and knowledge of the work and its hazards, is authorized to inspect conditions and order corrective action, such as for excavations, scaffolds, or rigging.

A check of a scaffold's foundation, plumb, bracing, ties, decks, guardrails, and access before first use and at required intervals, with results recorded and tagged on the structure.