75x200mm 4.2m Sawn & Treated C24 Graded Reg'd/KD Softwood

About

This 75x200mm 4.2m green-treated C24 softwood is listed as regularised construction timber for UK building and carpentry projects. The specified planed faces and rounded or eased edges make it practical for setting out structural carcassing.

Typical applications include heavier floor framing, roof supports, doubled trimmers and other specified structural timber members. A suitably designed connection is just as important as the C24 grade and nominal member size. These are examples of uses to consider, not a guarantee of suitability for every load or exposure condition.

The nominal section is 75x200mm; the current catalogue lists an approximate finished section of 73mm x 195mm. Nominal sizes and actual machined dimensions are not always the same. Different mills can have different tolerances, so check the confirmed supplied size before ordering close-fitting joist hangers, brackets or matched timber. Regularised timber offers a more consistent section than rough-sawn stock, but natural grain, knots and some movement are normal timber characteristics.

Can 75mm nominal timber be fitted into a matching joist hanger? The correct hanger must match the confirmed finished width and its manufacturer’s load and fixing specification, not just the nominal dimension in the product title. Use the correct fixings and bearing details.

What does green-treated mean? It identifies the listed preservative treatment or appearance, not a guaranteed Use Class. An exposed external application, particularly ground contact or exterior structural support, can require Use Class 4 treatment. Confirm the treatment specification for your intended exposure. Protect freshly cut ends, notches and large drilled holes with a suitable end-grain preservative, and select fixings compatible with treated timber and the environment.

For quantity planning, divide the total running metres needed by 4.2m per piece, round up to whole lengths and allow for cutting waste. Store pieces off the ground on level supports, with suitable weather protection. Ask Simply Timber about availability and delivery across England if your project requires a particular mill specification.