{"product_id":"c24-treated-carcassing-timber-kd-sawn-47mm-x-225mm-6m","title":"Treated Sawn Timber C24 Sawn 47mm x 225mm 6.0m","description":"\u003cp\u003eTreated C24 sawn timber 47mm x 225mm x 6.0m is a kiln dried, pressure treated structural softwood graded to BS 4978 for use in demanding load-bearing applications. Its generous depth makes it particularly well suited to floor joists, rafters and structural frames where longer spans or heavier loads are specified.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStructural softwood (spruce\/pine\/fir)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreatment\u003c\/td\u003e\n\u003ctd\u003ePressure treated, kiln dried to 20% MC or below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrade\u003c\/td\u003e\n\u003ctd\u003eC24 to BS 4978\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eSawn\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e47mm x 225mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e6.0m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat it's used for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFloor joists in new-build and renovation projects where wider spans require a deeper section\u003c\/li\u003e\n\u003cli\u003eRoof rafters and ridge construction on domestic and commercial buildings\u003c\/li\u003e\n\u003cli\u003eStructural wall frames, stud work and load-bearing partitions\u003c\/li\u003e\n\u003cli\u003eEngineered structural carcassing where C24 is specified by a structural engineer or building control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitting and handling\u003c\/h2\u003e\u003cp\u003eAllow the timber to acclimatise on site for at least 24 to 48 hours before fixing, keeping it off the ground and covered to maintain its moisture content. Use joist hangers, structural screws or galvanised nails suitable for treated timber, as standard bright-steel fixings can corrode when in contact with the preservative salts. Store flat and supported at regular centres to prevent bowing before installation.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between C16 and C24 treated timber?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eC24 has a higher bending strength and stiffness than C16, meaning it can carry greater loads or span longer distances for the same section size. Where a structural engineer or building regulations require C24, substituting C16 is not acceptable without recalculating the design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this timber suitable for ground contact?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePressure treatment provides good protection against rot and fungal attack in exposed or high-humidity environments, but this product is not rated for direct, prolonged ground contact. For posts or sleepers set into soil, choose a timber with a Use Class 4 treatment rating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I cut the treated timber on site without reapplying preservative?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes, site cutting is normal practice. Apply an approved end-grain preservative or treatment solution to any freshly cut surfaces, particularly at joints and notches, to maintain protection at those points.\u003c\/p\u003e\u003cp\u003eBrowse the full range of \u003ca href=\"\/collections\/c24-graded-timber\"\u003eC24 graded timber\u003c\/a\u003e at Nottage Timber Merchants. We supply trade and retail customers across South Wales, with next-day delivery available to the Bridgend area and competitive rates on larger structural orders.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the difference between C16 and C24 treated timber?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C24 has a higher bending strength and stiffness than C16, meaning it can carry greater loads or span longer distances for the same section size. Where a structural engineer or building regulations require C24, substituting C16 is not acceptable without recalculating the design.\"}},{\"@type\":\"Question\",\"name\":\"Is this timber suitable for ground contact?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Pressure treatment provides good protection against rot and fungal attack in exposed or high-humidity environments, but this product is not rated for direct, prolonged ground contact. For posts or sleepers set into soil, choose a timber with a Use Class 4 treatment rating.\"}},{\"@type\":\"Question\",\"name\":\"Can I cut the treated timber on site without reapplying preservative?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, site cutting is normal practice. Apply an approved end-grain preservative or treatment solution to any freshly cut surfaces, particularly at joints and notches, to maintain protection at those points.\"}}]}\u003c\/script\u003e","brand":"Nottage Timber Merchants","offers":[{"title":"Default Title","offer_id":52923079459153,"sku":null,"price":41.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/1467\/1697\/files\/treated9x2.webp?v=1769604771","url":"https:\/\/www.timberonline.co.uk\/products\/c24-treated-carcassing-timber-kd-sawn-47mm-x-225mm-6m","provider":"Nottage Timber Merchants","version":"1.0","type":"link"}