Gost 8486 57 -

The highest quality, primarily for export or high-end joinery.

is the primary interstate standard for sawn softwood (coniferous) lumber, such as pine, spruce, larch, cedar, and fir. While you asked about the 1957 version ( GOST 8486-57 ), it has been superseded by subsequent revisions, most notably GOST 8486-86 , which remains the current standard for technical requirements in many CIS countries. Key Classifications and Grades

Decreasing quality levels based on the presence and size of defects. Grade 1 is typical for structural work, while Grade 4 is used for low-load tasks like crates or temporary structures. Technical Requirements gost 8486 57

Parallel faces are sawn, but edges may remain unsawn or partially sawn.

The standard divides lumber into categories based on processing and quality: The highest quality, primarily for export or high-end

Load-bearing structural elements, high-quality flooring, and carpentry. General construction, floor joists, and roof rafters. Grade 3 Wall sheathing, sub-flooring, and heavy packaging. Grade 4 Low-grade packaging, pallets, and temporary scaffolding. Quality Control and Marking

All four sides are sawn, and the width of the wane (bark remnants) does not exceed permitted limits. The standard divides lumber into categories based on

Sawn timber of softwoods. Specification. Technical ... - LiS Ltd.