Oh, dude, rough sawn timber is basically wood that's been cut straight from the log using a saw, but it's not been planed or smoothed out all nice and pretty like your grandma's dining table. It's like the lumberjack of the wood world - all rugged and raw, ready to be transformed into something cool... or just left looking like a rustic charm in your backyard.
never
Rough sawn-not of final dimensions-milled.
A sawmill
C16 timber is sawn softwood structural timber which has been treated and strength graded
A joist, either floor or ceiling are the boards that go across the building and tie the walls together. A timber joist would be a rough sawn beam. Basically a tree that has been squared up.
It is a piece of wood made from trees
Re sawn lumber is achieved by re-processing smooth standard milled lumber to achieve a roughened surface, normally for aesthetics. The lumber is passed along a saw blade to achieve the desired effect. The finished size is smaller than nominal call-out dimension. Rough sawn lumber is the board, plank or timber prior to milling for final sizing. Rough sawn lumber is larger in dimensions to the nominal call out. Rough sawn lumber is sometimes referred as rough milled lumber when certain exact sizes are desired.
Long pieces of sawn timber refer to lumber that has been cut from logs into extended lengths and standardized dimensions, typically used in construction and woodworking. These pieces can include boards, beams, and planks, and are often used for framing, flooring, and furniture-making. The dimension and length of the timber can vary based on its intended use. Sawn timber is preferred for its strength, durability, and versatility in various applications.
rough
Timber is milled by cutting logs into rough dimensions using a sawmill. The logs are first debarked and then sawn into boards or beams of desired sizes and shapes. These milled timber products are then dried and prepared for use in construction or furniture making.
Wood (timber) comes from trees that are felled and sawn into planks or thick beams.
P.A.R. or PAR means Planed All Round when used in reference to timber. In other words, the timber has been prepared. The alternative is rough or sawn or unprepared timber. This has been cut to size but not finished in any way. Timber that is PAR is planed but there is no guarantee that the corners will be square!