Y

Yankee barn A steeply pitched, timber-framed, side-gabled wood barn of post-and-lintel construction, often with a gambrel roof; usually having no forebay; typically built against a hillside with animals housed at ground level on the lower side adjacent to the barn; similar to a bank barn.

Yankee gutter Same as arris gutter.

yard That part of a building plot not occupied by the building, open to the sky.

yardage 1. The number of cubic yards excavated or filled. 2. An area or surface, expressed in square yards.

yard drain A surface drain; used to clear an open area of surface water.

yard line That section of a consumer’s gas piping and fittings that extends from the point of service, 3 (i.e., point of delivery) to the house piping.

yard lumber Lumber up to 5 in. (12.5 cm) thick intended for general building construction.

yarn count See carpet face weight.

Y-branch, wye branch In a plumbing system, a branch in the shape of the letter Y.

Y-connection See wye (Y) connection.

yd Abbr. for “yard.”

year ring Same as annual ring.

yellow fir See Douglas fir.

yellowing The development of a yellow color or cast in white or clear coatings after aging.

yellow metal Same as Muntz metal.

yellow ocher, yellow ochre A form of earth used as a yellow pigment; limonite.

yellow pine A hard resinous wood of the longleaf pine tree, having dark bands of summerwood alternating with lighter-colored springwood; used as flooring and in general construction.

yellow poplar, poplar A moderately low-density, even-textured hardwood of the central and southern US; color varies from white to yellow, tan, or greenish brown; used for veneer, plywood, and lumber core for cabinetwork.

yellow poplar Same as tulipwood, 1.

yelm A bundle of reeds or combed straw used as thatching material for a roof.

yett A term for a massive gate, such as a portcullis, chiefly used in Scotland.

Y-fitting, wye fitting A pipe fitting, 1, one end of which subdivides, forming two openings at an angle, usually 45° to the run of pipe.

yield 1. The volume of freshly mixed concrete produced from a known quantity of ingredients; volume yield. 2. The number of product units, such as blocks, produced per bag of cement or per batch of concrete.

yield point The lowest stress in a material (less than the maximum attainable stress) at which the material begins to exhibit plastic properties; beyond this point an increase in strain occurs without an increase in stress.

yield strain The level of strain at which steel starts to show substantial plastic deformation.

yield strength The stress at which a material exhibits a specified limiting deviation from the proportionality of stress to strain.

Y-level Same as wye level.

yoke 1. A horizontal framework around the formwork for a column. 2. The horizontal piece forming the head of a window or door frame. 3. In plumbing, a two-way coupling for pipes, in the shape of the letter Y. 4. A yoke vent.

yoke relief vent, yoke vent See yoke vent, 2. 1. A pipe connecting upward from a soil stack or waste stack to a vent stack for the purpose of preventing pressure changes in the stack. 2. A vertical or 45° relief vent of the continuous-waste-and-vent type formed by the extension of an upright wye branch or 45° wye branch inlet of the horizontal branch to the stack; becomes a dual yoke vent when two horizontal branches are thus vented by the same relief vent. 3. A vent connected to a soil or waste stack that continues upward to the connection with the vent stack for the purpose of reducing pressure changes in the stack.

Yorkshire bond Same as monk bond.

Yorkshire light A window having one or more fixed sashes and a movable sash which slides horizontally.

Young’s modulus In an elastic material which has been subject to strain below its elastic limit, the ratio of the tensile stress to the corresponding tensile strain.

YP On drawings, abbr. for yield point.

YR On drawings, abbr. for “year.”

YS On drawings, abbr. for yield strength.

Y-tracery A type of tracery in which the mullions split in the shape of the letter Y.

yurt A circular tent-like dwelling used in northern Asia; can be readily dismantled, moved, and reassembled at another site; primarily constructed of a felt-like material and/or skins that are stretched over a wood framework.