Which statements about Cornerite are true?

Which statements about Cornerite are true?

• A. It must be installed to keep its position during plastering at all internal corners
• B. It may be omitted when plaster is not continuous from one plane to an adjacent plane
• C. It is a shaped reinforcing unit of expanded metal or wire fabric used to reinforce angles
• D. All of the above

Answer: (D)

Cornerite is a shaped reinforcing piece placed at interior corners, usually made from expanded metal or wire fabric, that anchors and strengthens the angle where plaster meets itself. It must be installed so it stays in place during plastering because the corner is the critical edge that guides the plaster and resists movement; without it, the corner can shift and cracks can develop as plaster is applied and troweled. It can be omitted when plaster does not continue from one plane to the adjacent plane, since there’s no continuous corner to reinforce and no need to hold a corner edge in place. And by definition, Cornerite is a reinforcing unit designed to reinforce angles in plastering, using shaped metal mesh to provide mechanical grip and stability in the corner. Taken together, these points explain why all of the statements describe true aspects of Cornerite.

Cornerite is a shaped reinforcing piece placed at interior corners, usually made from expanded metal or wire fabric, that anchors and strengthens the angle where plaster meets itself. It must be installed so it stays in place during plastering because the corner is the critical edge that guides the plaster and resists movement; without it, the corner can shift and cracks can develop as plaster is applied and troweled. It can be omitted when plaster does not continue from one plane to the adjacent plane, since there’s no continuous corner to reinforce and no need to hold a corner edge in place. And by definition, Cornerite is a reinforcing unit designed to reinforce angles in plastering, using shaped metal mesh to provide mechanical grip and stability in the corner. Taken together, these points explain why all of the statements describe true aspects of Cornerite.