Quartersawn, flat-sawn, and rift-sawn lumber: what the cut means for furniture

Walk into any lumber yard and you will see boards described as "flat sawn," "quarter sawn," or occasionally "rift sawn." These terms describe the orientation of the annual growth rings relative to the face of the board — which determines not just how the wood looks, but how it moves, how it wears, and how it should be used in furniture.

How the cuts are defined

The growth rings of a tree are concentric circles (when viewed in cross-section). The relationship between those rings and the face of a sawn board defines the cut.

Flat-sawn (also called plain-sawn): the face of the board is cut tangent to the growth rings. Looking at the end grain of a flat-sawn board, the rings run roughly parallel to the face — some angle of the rings to the face, but generally shallow. The face grain shows the characteristic parabolic or cathedral grain pattern.

Quarter-sawn: the face of the board is cut perpendicular to the growth rings — or within about 15 degrees of perpendicular. Looking at the end grain, the rings are roughly vertical, running from face to face of the board. This orientation reveals the medullary rays (radial cells that run from the pith of the tree outward) on the face, producing the distinctive ray fleck pattern visible in quartersawn white oak and other ray-prominent species.

Rift-sawn: the face of the board is cut at approximately 30–60 degrees to the growth rings — between flat and quartersawn. The end grain shows rings at a diagonal. The face grain is straight and even, with none of the parabola of flat-sawn and none of the ray fleck of quartersawn. Rift-sawn lumber is the most stable of the three cuts.

Visual character of each

Flat-sawn shows the widest growth rings and the most varied visual pattern — the parabolic cathedral grain on the face, with figure that can range from plain and even (in slow-grown dense species) to dramatic and energetic (in fast-grown or figured stock). Most dimensional lumber purchased at a home center or lumber yard is flat-sawn; it is the most efficient cut because it produces the widest boards from a given log diameter.

Quartersawn shows a consistent, straight grain pattern on the face and, in ray-prominent species, the distinctive ray fleck. Quartersawn white oak has visible silver or gold flecks running across the grain; quartersawn sycamore has an almost lacework figure; quartersawn walnut and cherry are visually similar to flat-sawn of the same species but with a more consistent grain direction. The visual character reads as restrained and formal — appropriate for furniture where grain pattern should support rather than dominate the design.

Rift-sawn has the most consistent and "quiet" face grain of the three cuts. It looks very similar to quartersawn on the face but without the ray fleck. It is common in chair legs and table legs where consistent straight grain in all four visible faces is required — because quartersawn produces ray fleck on the flat face but a cathedral figure on the edges, and flat-sawn produces cathedral figure on the wide face but inconsistent edges.

Stability differences

This is where the practical difference between cuts matters most for furniture design.

Wood movement is primarily tangential (parallel to the growth rings) and secondarily radial (perpendicular to the growth rings). Tangential movement is roughly twice radial movement in most species. The orientation of the growth rings in the board determines which type of movement occurs across the board's width.

Flat-sawn boards move primarily tangentially — their width-wise movement is the largest of the three cuts. They also tend to cup (the wide face of flat-sawn lumber cups toward the bark side as it dries) because tangential shrinkage is greater than radial.

Quartersawn boards move primarily radially — their width-wise movement is approximately half the tangential movement of flat-sawn boards of the same species. They do not cup because both faces have the same growth ring orientation. They are significantly more stable in width.

Rift-sawn boards are the most dimensionally stable of the three because neither face is predominantly tangential or radial — the movement is distributed at an angle that reduces the tendency for any single directional change to dominate. They are the correct choice for leg stock and any application where consistent behavior in all four faces is required.

When to specify each cut

Flat-sawn: when cost and availability are primary considerations and the movement can be accommodated in the design. Most furniture is flat-sawn because it is more available and less expensive. A well-designed flat-sawn tabletop with proper movement allowances in the attachment will outlast a poorly designed quartersawn top with insufficient allowances.

For heavily figured species where the visual drama of the grain is the point (burl, crotch, figured maple with strong figure), flat-sawn is often the correct choice because the figure is most visible on the tangential face.

Quartersawn: when stability and the distinctive visual character are both required — Arts and Crafts furniture in white oak, for example, where the ray fleck is the defining visual element and the furniture is expected to age without significant movement. Also correct for wide panels in humid environments (kitchens, bathrooms, high-seasonal-variation climates) where minimizing movement is the priority.

Quartersawn lumber is more expensive (more waste in the cutting process — the log must be rotated to maintain perpendicular ring orientation on each board) and less available than flat-sawn. Expect to pay a 30–60% premium for quartersawn in most species; availability outside of specialty dealers varies.

Rift-sawn: for table legs, chair legs, and any component where four-sided grain consistency matters. The standard practice in period and reproduction furniture shops is to use rift-sawn stock for all leg components — the straight, consistent grain on all four faces produces legs that look correct from any viewing angle and that move consistently in all directions.

Rift-sawn is the most expensive cut per board-foot because it produces the most waste relative to flat-sawn, and specialty mills cut it intentionally rather than as a byproduct of the milling process.

Identifying cuts at the lumber yard

The quick identification: look at the end grain. Rings roughly parallel to the face = flat-sawn. Rings roughly perpendicular = quartersawn. Rings at 30–60 degrees = rift-sawn. On the face grain: parabolic cathedral = flat-sawn. Consistent straight grain = quartersawn or rift; look for ray fleck to distinguish (ray fleck = quartersawn, no ray fleck = rift).

In mixed-orientation boards (lumber from near the edge of the log often shows intermediate ring angles), the cut type describes the dominant orientation. A board with rings at 75 degrees to the face is quartersawn for practical purposes, even if it is not perfectly 90 degrees.

The mixed approach

Most furniture is not made from one cut throughout. A typical dining table might use quartersawn lumber for the top (for stability and visual character), flat-sawn for the aprons (where the inside face is not visible and movement is accommodated by the table clips), and rift-sawn for the legs (for four-sided grain consistency). This mixed approach uses each cut where it performs best, which is both technically correct and economically rational.

The furniture maker who can identify grain orientation at the yard, calculate the movement it will produce, and design the attachment accordingly is the maker whose pieces survive in the same condition they were delivered in.