This topic covers information related to wood, plastic, and composite fasteners that are used in construction. Fasteners can be a hardware device that mechanically joins materials or a liquid mixture that bonds materials together. Fasteners include nails, screws, bolts, metal connectors and adhesives.
This topic covers information related to the treatment or preservation of wood materials used in construction. Wood treatment increases durability and resistance, protecting wood from fire, moisture deterioration and insect infestation. Several types of preservatives and process exist to treat wood.
This topic covers information related to the treatment of wood with preservatives used in construction. Preservatives can be added to wood to prevent the growth of mold and deter insects. Methods of preservation include vacuum or pressure treatment with chemicals such as arsenic, copper, chromium, or borate, in addition to others.
Fire-retardant wood treatment (FRT) is the process by which pressure impregnates wood with fire-retardant chemicals. It is a protective treatment that reduces the combustible nature of wood, minimizes the effects of fire, and is suitable for interior and exterior wood, dimensional lumber, engineered lumber (excluding wood wafer products), and finish materials. Two types of FRT exist today: one involves a blend of a nitrogen-phosphorus organic compound and boric acid, and the other involves the use of ammonium polyphosphates with additives (boric acid, borax, moldicides, and others). Formulation compositions used to treat wood are proprietary and differ between manufacturers.
