According to the World Health Organization, mercury produces a suite of ill effects, including harm to the nervous, digestive and immune systems, and even death. WHO lists children and developing fetuses as especially vulnerable to damage from mercury. Mercury bioaccumulates in the environment, eventually reaching concentrations thousands of times more intense than ambient levels. https://healthymaterialslab.org/tool-guides/hml-resources

Rock formed by the action of pressure and/or heat on sedimentary soil or rock.

- A manufactured structural wood beam. It is constructed of pressure and adhesive bonded wood strands of wood. They have a higher strength rating than solid sawn lumber. Normally comes in l ½" thickness' and 9 ½", 11 ½" and 14" widths

A formal description of the boundary lines of a parcel of real property in terms of the length and direction of those lines.

A device measuring and recording the amount of electricity passing through it in kilowatt-hours.

A white crystalline made from calcium cyanamide.

The temperature at which a material turns from a solid to a liquid.

A continuous, unbroken roof covering.

Metric units shown as equivalents in this Handbook are from the International System of Units in use throughout the world, as established by the General Conference of Weights and Measures in 1960. Their use here complies with the Metric Conversion Act of 1975, which committed the United States to a coordinated voluntary conversion to the metric system of measurement. Refer to the Appendix for metric units and conversion factors applicable to subjects covered in this Handbook. For additional information, refer to ASTM E380-76, Standard for Metric Practice.

Sheets of metal that are slit to form openings within the lath. Used as a plaster base for walls and ceilings and as reinforcing over other forms of plaster base. Perforated sheets of thin metal secured to studs that serve as the base for a finished plaster wall.

Joint formed by two pieces of material cut to meet at an angle.

Generally all building materials made of finished wood and manufactured in millwork plants. Includes all doors, window and door frames, blinds, mantels, panel work, stairway components (balusters, rail, etc.), moldings, and interior trim. Does not include flooring, ceiling, or siding. Wood interior finish items manufactured in a factory, such as doors, windows, and cabinets.

(1) In architecture, a selected unit of measure used as a basis for building layout; (2) In industrialized housing, a three-dimensional section of a building, factory-built, shipped as a unit and interconnected with other modules to form the complete building. Single-family units factory-built in two halves are usually referred to as "sectionals."

A roofing membrane composed of a polyester or fiberglass mat saturated with a polymer-modified asphalt.

Steel containing less than 0.3 percent carbon.

A dimension that conforms to a given module, such as the 48-inch width of plywood panels.

Building code, written and published by a building-official association, available to states, counties and municipalities for adoption (for a fee) in lieu of their own, e.g., Uniform Building Code, Standard Building Code, National Building Code.

The joint of two pieces at an angle that bisects the joining angle. For example, the miter joint at the side and head casing at a door opening is made at a 45° angle.

An agent that helps prevent the growth of mold and mildew on painted surfaces.

- Plastic, transparent copies of a blueprint.