板材（いたざい）とは、平らで細長い長方形の木材（英語版）で、厚さよりも幅広く長い平行する面を持つ。主に大工仕事で使用され、板材は船、住宅、橋、および多くの他の建築物の構築に欠かすことができない[1]。板材はまた棚やテーブル作りで支持部材にもなる。
古くは、榑（くれ）と呼ばれ、延暦10年（791年）にある『太政官符』や鎌倉時代の『吾妻鏡』に規格が決められていたことが書かれている[2]。
板材は鋸で切った木材から作られ、厚さは通常1+1⁄2インチ (38 mm)以上で、幅は一般に2+1⁄2インチ (64 mm)以上である。アメリカ合衆国では、板材の長さは自由で、厚さ2インチ (51 mm)幅8インチ (200 mm)以上であるが、厚さ2インチ (51 mm)幅10インチ (250 mm)、厚さ2インチ (51 mm)幅12インチ (300 mm)が木材店のより一般的な品揃えである。高架足場の作業床に使うことも多く、作業時に折れない強度と十分な幅が必要とされる。アメリカ合衆国では、幅2+1⁄2インチ (64 mm)以下で厚さ1+1⁄2インチ (38 mm)以下の木材をboardと呼ぶ。
建築で水平支持部品として使用し、基礎、壁、または梁の間を渡して床や天井を支える板材を根太（英語版）という。
板材は海運の基礎であった：木材が水に浮き、豊かな森林から丸太を容易に伐採処理できたことにより、板材は造船の主材料となった。しかしながら、20世紀以降、造船で木材の大部分は鉄や鋼に置き換えられ、費用が削減され強度が改善した[3]。
Sartène / Sartè Entidad subnacional Place de la Liberation Escudo Sartène / SartèLocalización de Sartène / Sartè en Córcega Coordenadas 41°37′15″N 8°58′25″E / 41.620833333333, 8.9736111111111Entidad Comuna de Francia • País Francia • Región Córcega • Departamento Córcega del Sur • Distrito Distrito de Sartène (subprefectura) • Cantón Cantón de Sartène (cabecera)Alcalde Pierre Gori (UMP y aliados)Superficie &…
يفتقر محتوى هذه المقالة إلى الاستشهاد بمصادر. فضلاً، ساهم في تطوير هذه المقالة من خلال إضافة مصادر موثوق بها. أي معلومات غير موثقة يمكن التشكيك بها وإزالتها. (فبراير 2016) أرىمعلومات عامةالنوع مجلة أسبوعيةالتأسيس 2011الثمن 10 دراهم إماراتيّةشخصيات هامةالمدير التنفيذي ظاعن شاهي
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This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Altamira Software – news · newspapers · books · scholar · JSTOR (June 2007) (Learn how and when to remove this template message)This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this …
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