Certified high-strength material intended for load-bearing structures.

Visual quality assessment: Sound knots are allowed, with minimal cracks; stable, relatively smooth surface.

Application: One of the most commonly used grades in construction. Suitable for heavier loads and more demanding projects such as roof structures, floor joists, and other critical timber frame elements where high load-bearing capacity and reliability are required.

Certified high-strength material for auxiliary structures.

Visual quality assessment : Lower mechanical strength than C24. Larger knots, possible cracks, slightly uneven wood pattern.

Application : For buildings with lower loads, auxiliary rooms, internal walls. More economical, so it is often chosen in projects where budget is important, but reliable and durable wood is required.

Visual quality assessment : Many, variously sized branches, cracks, visual defects, possible fiber deviations, there may be irregularities.

Application : Suitable for greenhouses, fences, auxiliary structures, walkways where guaranteed load-bearing capacity is not required. Not classified by strength - not suitable for load-bearing structures, not tested according to EN 338 or equivalent standard.