- Awning valance
- The hanging fabric or metal flap along an awning's front edge. It counts as part of the awning when clearance above a sidewalk is measured, so the lowest point, valance included, is what gets compared with the minimum height the code requires over a public walkway. Installers therefore check this lowest edge, not the top of the frame, before committing to a mounting height.
- Sidewalk projection limit
- A cap on how far a low awning may reach out over a public walk, set as a share of the sidewalk's width measured from the building. Supporting columns must also stay back from the curb line, so planning starts with measuring the walk. The limit applies to awnings under a stated height above the walk, so a higher awning is judged by a different test.
- Awning fabric flame test
- One of the accepted fire tests an awning covering must pass, such as a vertical flame propagation test, a low flame-spread rating, or a room-corner burn. A canvas or vinyl fabric needs documentation showing it met one of them. Paperwork from the fabric maker, not appearance or thickness, shows which test was passed, so the installer keeps it with the job file.
- Powered door leaf
- A single door panel that opens by motor. Accessibility rules count the panels at an entrance, and a set proportion being powered lets the remaining manual panels avoid the lowest opening-force requirement, so counting leaves matters. A retail entrance with several exterior leafs is the typical setting for this counting problem, and fractions of eight count as a full group.
- Push plate pair
- Two activation buttons installed at different heights on each side of a powered door, so the control can be reached from a wheelchair and by someone standing. Sensing devices or bars can serve instead, but both sides need a control. Heights are specified to the centerline of each plate, so measure to the middle of the plate rather than to its edge.
- Backup cycling
- A rule that a powered entrance in a busy building must keep working through a power failure, using a battery or generator able to open and close the door a minimum number of times. It applies above a set occupant load. Each powered door also needs an entrance sign mounted on it or next to it, so signage belongs on the same checklist.
- Vehicular gate listing
- Automatic gate openers must be tested and listed to a recognized safety standard, and the gate itself built to a separate standard for automated gates. California's code names these standards but prints no dimensions, so the numbers live in the standards. A candidate should know which standard covers the gate's construction and which covers the opener, even though the code gives no figures.
- Wheelchair accessible compartment
- A toilet stall sized so a wheelchair user can enter, turn, and transfer. Its required width and depth change depending on whether the water closet hangs on the wall or sits on the floor, and the door position and swing are set to keep the clear floor space. Plan the layout outward from the water closet centerline, because grab bars, dispensers, and door clearances are all measured from it.
- Ambulatory compartment
- A narrower stall with grab bars on both side walls, provided for people who walk with braces or a cane. It is installed in addition to the wheelchair stall in larger restrooms, and its width falls in a tight range. Both side walls carry grab bars, which is the quickest way to tell it apart from the wheelchair stall on a drawing.
- Side-wall grab bar
- The horizontal bar mounted beside a toilet, specified by minimum length, its distance from the rear wall, and how far it extends past the front of the fixture. A partition installer must confirm that the wall can take the load. Rear-wall bars are specified separately, with their own length and position relative to the water closet centerline.
- Pool system head
- The total resistance a pool pump must overcome, measured in feet of water. It is found by squaring the flow rate and multiplying by a coefficient that depends on pool volume, and it helps decide whether a replacement pump suits the piping. Head is figured for the flow the pump will actually deliver, and a larger pool uses a smaller coefficient than a small one.
- Dedicated-purpose pool pump
- A pump built specifically for pools and spas. When one is replaced, it must appear in the state's directory of certified equipment, and its filtration flow must stay under the limit the energy code sets for that pool. Replacement motors on these pumps follow the same listing idea, so the installer checks the directory before ordering.
- Sweep elbow
- A long-radius fitting that turns pool piping gradually rather than sharply, cutting turbulence and friction. The energy code expects these on pump piping, along with a straight run ahead of the pump and a cap on water velocity. Velocity caps differ for the return and suction lines, so check both whenever pipe is sized.
- Backwash valve
- The valve that reverses flow through a pool filter to flush trapped debris. The energy code sets a minimum size for it, tied to the return pipe diameter, so a small valve cannot choke the system. The rule's wording means comparing two sizes and taking the larger, a small trap in what looks like a simple number.
- Scaffold duty class
- A rating of light, medium, heavy, or special duty, each tied to the working load per square foot of platform it must carry. Choosing the class from the real work, such as masonry versus painting, sets the plank span and the design load. The higher the class, the shorter the plank may span, which is why a heavier duty class means more supports under the deck.
- Four-times design load
- The safety factor for scaffolds: each one must carry its own weight plus four times the heaviest working load intended for it. Candidates calculate the intended load from the duty class, then multiply, to see what the structure must resist. It is a design rule rather than a field test, so the arithmetic is done on paper before any platform goes up.
- Plank overhang
- The length of a scaffold plank that extends past its support. Too much can tip the plank under a worker's weight, so overhang is capped unless a guardrail blocks access to it or the other end is anchored. A loaded plank also may not sag past a small fraction of its span, so overhang and deflection are checked together.
- Felling notch and hinge
- The wedge cut in a tree trunk that points the fall, together with the strip of uncut wood left between notch and back cut. The hinge steers the tree as it falls, and the notch depth is limited so the hinge stays strong. The two cuts forming the notch must not cross, and the back cut stops short of the hinge area.
- Line-clearance tree trimmer
- A worker trained and permitted to prune near high-voltage energized conductors. Others must stay a prescribed distance away, and the closest approach is set by line voltage, so a service drop and a distribution line are treated differently. Tree workers who are not line-clearance trimmers still have a distance limit to respect around low-voltage lines.
- Climbing line
- A synthetic rope used with a tree worker's saddle that must meet a minimum rated strength and diameter and limit how far it stretches under load. Workers aloft need at least two ways of being secured, so the line is paired with a work-positioning lanyard.
