| see Roof Hatch.
|
| A hinged or removable cover in a floor or roof which permits ventilation or the passage of persons or objects.
|
| A multi-purpose short handled hand tool with a head suitable for alternative use as a hammer or axe; the convex head configuration to properly dimple the nail and the hatchet blade used to cleave and adjust framing and wallboard edges to fit, or as a jacking wedge.
|
| An opening giving access usually by ladder to a lower space like a cellar.
|
| The distance measured along the most direct practical route between the center of the mass of excavation and the center of mass of the fill as finally placed; the distance material is moved.
|
| station Yards of Haul.
|
| A metal square with a wooden handle at the center, used by a plasterer or tilesetter, to temporarily hold mortar or plaster; commonly, a rubber pad fits over the handle and covers that portion of the metal hawk that would come in contact with the hand.
|
| A material or substance characterized by a propensity to be unhealthy, toxic, or dangerous.
|
| All wiring except that which conforms with all applicable laws in effect at the time of installation and which has been maintained in good condition and is being used in a safe manner.
|
| Hose Bibb.
|
| The exterior flashing installed at the head of a door, window, or other opening.
|
| Head required to overcome friction of the interior surface of a conductor and between fluid particles in motion.
|
| see Butt Joint, 4.
|
| Pressure-operated control which opens electrical circuit if high-side pressure becomes too high.
|
| Pressure in the condensing side of a refrigerating system.
|
| Height of fluid equivalent to its velocity pressure in a flowing fluid.
|
| see Pop-Up Head.
|
| see Service Head.
|
| see Static Head.
|
| see Total Static Head.
|
| 1. The operative part of a tool. 2. The flattened part of a nail. 3. The upper horizontal part of a door, window, or other opening. 4. The pressure produced by a difference in elevation of two points in a body of fluid. 5. The top part of a column or pillar.
|
| A brick bond that will show only headers on the face or surface of a wall; each header would be divided evenly over the header underneath it.
|
| A brick bond in which a course made up of headers only.
|
| The height up to the top of the brick course that is directly under a header course.
|
| A joist perpendicular to and supporting ceiling joists.
|
| 1. Length of pipe or vessel to which two or more pipe lines are joined carries fluid from a common source to various points of use; a manifold. 2. The pipe that runs across the top or bottom of an absorber plate, gathering or distributing the heat transfer fluid from or to the grid of pipes that runs across the absorber surface. 3. A lintel. 4. A structural support over an opening. 5. A joist that supports other joists; a short joist into which the common joists are framed around or over an opening. 6. A brick that is laid on its flat surface across a wall and will show only its end on the surface or face of the wall. 7. A masonry unit which overlaps two or more adjacent wythes of masonry to tie them together; also called a Bonder.
|
| The minimum distance, measured at 90 degrees to the eave along the face of a shingle or felt as applied to a roof, from the upper edge of the shingle or felt, to the nearest exposed surface.
|
| The clear space between the floor line and ceiling, as in a stairway.
|
| The act or process of demolition and removal of a headwall.
|
| A wall, usually constructed of concrete or masonry, that is placed at the inlet side of a drain or culvert to protect fill from scouring, undermining, or to divert flow.
|