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Title: Section 2501  •  Size: 6036

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2501.1 General. The installation of lath, plaster and gypsum board shall be done in a manner and with materials as specified in this chapter and, when required for fire-resistive construction, also shall conform with the provisions of Chapter 7.

Other approved wall or ceiling coverings may be installed in accordance with the recommendations of the manufacturer and the conditions of approval.

2501.2 Inspection. No lath or gypsum board or their attachments shall be covered or finished until it has been inspected and approved by the building official in accordance with Section 108.5.

2501.3 Tests. The building official may require tests to be made in accordance with approved standards to determine compliance with the provisions of this chapter, provided the permit holder has been notified 24 hours in advance of the time of making such tests.

2501.4 Definitions. For purposes of this chapter, certain terms are defined as follows:

CEMENT PLASTER is a mixture of portland cement, portland cement and lime, masonry cement, or plastic cement and aggregate and other approved materials as specified in the code.

CORNER BEAD is a rigid formed unit or shape used at projecting or external angles to define and reinforce the corners of interior surfaces.

CORNERITE is a shaped reinforcing unit of expanded metal or wire fabric used for angle reinforcing and having minimum outstanding legs of not less than 2 inches (51 mm).

CORROSION-RESISTANT MATERIALS are materials that are inherently rust resistant or materials to which an approved rust-resistive coating has been applied either before or after forming or fabrication.

EXTERIOR SURFACES are weather-exposed surfaces as defined in Section 224.

EXTERNAL CORNER REINFORCEMENT is a shaped reinforcing unit for external corner reinforcement or cement plaster formed to ensure mechanical bond and a solid plaster corner.

INTERIOR SURFACES are surfaces other than weather-exposed surfaces.

MOIST CURING is any method employed to retain sufficient moisture for hydration of portland cement plaster.

PORTLAND CEMENT PLASTER is a mixture of portland cement or portland cement and lime and aggregate and other approved materials as specified in this code.

STEEL STUDS, LOAD-BEARING AND NONLOAD-BEARING, are prefabricated channel shapes, welded wire or combination wire and steel angle types, galvanized or coated with rust-resistive material.

STRIPPING is flat reinforcing units of expanded metal or wire fabric or other materials not less than 3 inches (76.2 mm) wide to be installed as required over joints of gypsum lath.

TIE WIRE is wire for securing together metal framing or supports, for tying metal and wire fabric lath and gypsum lath and wallboard together and for securing accessories.

WIRE BACKING is horizontal strands of tautened wire attached to surfaces of vertical wood supports which, when covered with building paper, provide a backing of cement plaster.

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