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Multiplek
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Definition
Plywood — sheets of wood veneers glued and pressed together with alternating grain direction for strength. Multiplek is the standard formwork (bekisting) material for concrete slabs and vertical surfaces in Indonesian construction. Quality grades range from exterior-grade (water-resistant) to interior-grade, with thickness from 6 mm to 25 mm depending on span and loading.
Example
Indonesian concrete floor slab formwork is typically 18 mm exterior-grade multiplek supported on a grid of steel props or timber joists — the plywood providing the smooth underside soffit finish that becomes visible after stripping.