What term describes a warp across the width of the face of wood, with edges higher or lower than the centre?

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Study for the Diploma Programme Design Technology Exam. Engage with flashcards and multiple-choice questions, each offering hints and detailed explanations. Be well-prepared for your test!

Multiple Choice

What term describes a warp across the width of the face of wood, with edges higher or lower than the centre?

Explanation:
Cupping is a warp across the width of a wood face where the edges are higher or lower than the center. It happens when moisture movement or uneven drying causes one face or edge to shrink or swell differently from the opposite side, curling the surface across the width. This is distinct from warps that run along the length, and from terms like creep (deformation under sustained load), density (mass per unit volume), or design for assembly (a design consideration, not a wood warp).

Cupping is a warp across the width of a wood face where the edges are higher or lower than the center. It happens when moisture movement or uneven drying causes one face or edge to shrink or swell differently from the opposite side, curling the surface across the width. This is distinct from warps that run along the length, and from terms like creep (deformation under sustained load), density (mass per unit volume), or design for assembly (a design consideration, not a wood warp).

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